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Location:
perth WA
Registered:
January 2003
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why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 10:16
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i have spent hours trying to get my 1jz to make power i have following mods
stock 1jzgte
el falcon throttle body
16" x 18 " bar and plate intercooler (not cut down truck)
haltech e6k with 2x haltech ignition modules
garret gt30 ball bearing turbo ( biggest one rated at 550hp )
turbo specs = .7 a/r comp with 63 mm wheel , .82 ex
turbosmart exterternal 45mm wastegate
550cc US 2jzgte injectors
bosch 044 efi pump feeding from a 2.5lt surge tank with a holley blue as a lifter pump ..
ive been to the dyno twice . first with 440cc inj , i made 281 rwhp at 15 psi and ign timing at 9deg .. ( that was suspose to be limit)
then back again today , 550cc inj and we cranked 19 psi at 15 deg ign timing , made 291rwhp ..
intake temps sitting at 40 deg didnt rise, removed air cleaner .. etc etc ... why arent the numbers jumping up ??
Manny u have any idea ??
here is a link to my car ..top left and top centre ..
http://www.lowerlevel.com.au/cruz2.html
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Location:
Brisbane
Registered:
June 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 10:22
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just a question, what size exhaust u using?
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 10:36
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.82 as is says in description
GT30
SB8006A
700177-0014
0.70
64
GT40
2.41/3.22
550
65
0.82
84
2.16/2.36
that the details from ray hall turbos
http://www.turbofast.com.au/GTseries.html
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Location:
Brisbane
Registered:
June 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 10:37
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im talking about the system
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Location:
Forrestfield, WA
Registered:
August 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 10:43
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i know of stock 1jizzas in jza70's that make 270+ rwhp (on hub dyno) with exhaust and podfilter and like 12psi
you should be over 300... but all said and done dyno readings dont really mean that much if you know the car is running right.
That said my mate put his cefiro on the dyno and rolled out a miserable 140rwhp.. less than stock figure and he has pod filter, zorst, fmic, 10psi .. turns out he had a boost leaks that he didnt even realise he had (only runs low boost normally like 5-6psi)
Take it down the drags and lay down some times.. if somethings broken you'll find out in a hurry.
My car feels slow and i thought it was running like a bucket of poo, but on crappiest tyres ever i got a 14 flat so i figure its running okish.... i get some decent tyres should be high 13's which would put the power at the wheels at about 270/280hp... and its just got filter, zorst and s-afc.
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Location:
Sydney
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 10:47
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why so little timing? was it knocking?
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Location:
nz
Registered:
June 2004
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 11:22
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My ct12a with steel exhaust wheels not cermanic made over 250kw on the dyno you should be a lot more than that.
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Location:
Brisbane
Registered:
October 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 11:34
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those intake temps are a bit harsh
what AFR was it at
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 12:21
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3 " exhaust from turbo , 3.5 " muffler 4 45deg bends .. no other restrictions .. intake temps arent harsh 40 is fine .. considering car didnt get turned off for 2 hrs of dyno runnning ..stayed the same the whole time ..
ing timing well we could pump in 18deg that was what i was pushing for but tuner was getting scared .. im not tuning it so i dont know .. but would the extra 3-4 deg ing timing make 100 hp differance ??
mate has r33 skyline , same ecu , exact same turbo , 550cc inj , gtr intercooler only he had custom inlet plenum and 80mm throttle body and 19psi got him 411 rwhp at 18deg ign ..outta a dam rb25 det
I SHOULD BE MAKING 400rwhp at 20 odd psi !!! what else could it be ..
ps i have a tubular 1" 1/4 exhaust manifold .. very close to tuned length
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 12:23
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40 deg in a dyno cell is fine, I would be concerned about the amount of total ign advance, seems to be fairly low, every degree is equal to many hp.
What are the losses of your driveline ? is it an auto ?
What base fuel pressure are you running, stock fuel pressure may not give an efficient spray pattern on your large injectors, high base fuel pressure will net Hp on a 1j.
Boost - a decent sized turbo - like yours - is not likely to be in its efficiency untill it starts to provide 17 psi plus.
A mates car at 15 psi and gt3540 equipped actually lost power over the previous (highly developed )stock turbo set up. THe jump to 19 - 20 psi added huge HP gains.
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 12:27
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5 psi and 5 more degrees adv. would make the 100 you seek.
What is it that scared your tuner ?
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 12:34
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1st time i went to dyno 9deg ign 15 psi = 281rwhp on 33 deg ambient day
today 22deg day 15deg ign 19psi = 291 rwho .. on same dyno .. ( but i did gain a heap .. boost came on sooner and lasted all the way to redline ..
next time i go 18 deg ing timing and 22-25 psi boost .. and i better get 400 ..
im running stock fuel rail and fuel pressures .. there has been NO FUEL problems what so ever ..
we had problems controlling boost with a haltech boost controller .. 19 psi i got is maxx the controller would bleed ..
we re configured it all and it made 30 psi .. no pinging !!
but didnt do a power run or nothin .. just made the boost and then backed off ..
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 12:48
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Do you have a fuel presure gauge ?
What size fuel lines do you run ?
If there is not enough flow - no amount of pressure is sufficient to stop a low pressure condition with large injectors.
Have you removed the little valve on the side of the 1j block ? (part of stock fuel system). It has an internal diameter of less than 1/8th of inch.
Get a gauge and FPR, necessary for serious tuning.
You should amke the 400rwhp, just gotta get the tuning (may require hardware) right.
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Location:
Perth
Registered:
October 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 13:37
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slylux: Check your PM mate, i have a few ideas.
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Location:
Sydney
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 03 June 2004 14:09
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My Power FC suggests I'm running up to 39 degrees at various points on my timing map...
Stock fpr and pulsation damper is fine for 400rwhp in my experience.
I'm running a 290lph intank pump and 650cc injectors at 70% duty cycle at 20psi without any flow or pressure issues to date.
Sard adjustable fpr and pulsation damper bypass line hasn't been required yet.
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Location:
Adelaide
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Fri, 04 June 2004 00:07
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From what you've said, everything is fine in terms of temps, fuel etc, and my money would also be on the ignition advance. On boost you should be able to run a heap more than that-I'd be guessing it should cope with 20 or so degrees on boost. As an example, I'm running 18 degrees in my 1FZ toyota donk with similar head design, 15 psi and 9.0 compression and there wasn't any pinging on a hot day (on chassis dyno). I think you will find that the extra 4 degrees+ ignition timing will be the difference. I wouldn't bother trying to screw more pressure into it, start winding up the timing instead and you'll be pleasantly surprised. As you advance the timing it'll lean out a little, but only requiring a small percentage increase to offset it.
Take it easy
Sean
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Location:
sydney
Registered:
June 2003
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Location:
Perth
Registered:
October 2003
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Re: why doesnt my 1jzgte make any power ???
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Fri, 04 June 2004 08:36
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| twinturbo86 wrote on Fri, 04 June 2004 10:42 |
i wouldn't get too aggressive with the timing, not all detonation is audible. i have the same turbo as u on my 1ggte at 15psi mine has 15degrees and at 20psi it has about 10. im making 290 rwhp on standard injectors(maxed) at 18psi, the boost mixtures are between 11.5 and 12:1
and i consider that to be a conservative tune.i could give it more timing but with standard internals it will more than likely become a hand grenade. no mater how hard i try i can't blow the motor.your tuner was right in being scared, too much timing kills engines.
another thing, double check no triple check your base timing at idle, lock the base timing and check where its firing, if its wrong all of ur figures will be out. i got caught like that.
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Another who has been caught! if your timing is 18 degrees on the computer, but base is 10 degrees retarded like mine was you may only have 8 degrees advance. Ill try and get over Monday to check your timing dude.
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Fri, 04 June 2004 12:15
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yes im starting to think its all to do with ign timing .. ive spoken to another brainy person they r pointing to timing too . he said it should be up at 18-20 deg .. ( he tuned a 7mgte with 26 deg on full boost but that is running a trd head gasket )
car is booked in on tuesday for a retune at a different workshop ( SST ) lets hope they have some luck .. if they fix it i can definatly say my prev tuner doesnt know what they r doing .. if they dont fix it ..
ill burn the car ..
only jokes .. ill start lookin into other areas ..
MANNY what ing timing u have at full boost ??
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Fri, 04 June 2004 12:27
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ohh as for audioable pinging , tuner used a hks knock thingy and hear muffs and my factory knock sensors , to listen for pinging .. so if it even slightly pinged he heard it way before it was truely audiable ..
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Location:
sydney
Registered:
June 2003
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Re: why doesnt my 1jzgte make any power ???
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Fri, 04 June 2004 12:52
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26 degrees at full boost is a lot of timing.how much is full boost
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: why doesnt my 1jzgte make any power ???
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Fri, 04 June 2004 14:32
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i would suggest running a rising rate fuel regulator, such as a malpassi unit.
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Location:
Sydney
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 05 June 2004 01:27
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| slylux wrote on Fri, 04 June 2004 22:15 |
MANNY what ing timing u have at full boost ??
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Depends on where full boost is set at the time, eg at peak power at 5500rpm-
10.2 psi 38 degrees
11.6 psi 35 degrees
13.1 psi 32 degrees
14.5 psi 30 degrees
16.0 psi 28 degrees
17.4 psi 26 degrees
18.9 psi 26 degrees
20.3 psi 26 degrees
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Sun, 06 June 2004 13:04
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thanks a heap manny ..
ill note that to the tuner that tunes it on tuesday ..
ps people keep suggesting fuel issues !! im not having any fuel problems .. so i dont know how that is goin to limit / make power .. .. there is no need for rising rate reg or 1/2 fuel lines .. but IF i have fuel problems at any more power .. this will be the first things i will look at ..
AS MANNY said .. he has 400rwhp with stock fuel rail . lines and regulator ..
thanks for advice guys .. ill let u know tuesday night what happens
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 10:18
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FIXED ... thanks for all the info guys went to different tuner today got 397 rwhp at 20 psi .. think it was only 17 deg ing timing , but still more to come as i need to do a couple of things .. eg clutch .. but im stoked !!!
was running too rich that is where all the power was lost .. plus that couple extra deg ..
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Location:
Perth
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 10:40
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On a side note, saw your car at SST today and heard it on the dyno. I gave it my once over.
Nice Hilux mate.
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 10:48
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thanks mate !! i had a crowd there at one stage .. some scratching there heads thinking what a nutter .. 400rwhp in a hilux ..
also 1700lbs of torq . what that in newton metres?
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 10:54
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also you are running same turbo as me ?? what hp u getting outta ya mr2 ??
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Location:
Perth
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 10:55
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Holy shit.......!
1700 foot pound is 2304.894 Newton Meters!! 
1700 inch pound is 192.0741 Newton Meters!!
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Location:
Perth
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 10:59
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| slylux wrote on Tue, 08 June 2004 18:54 |
also you are running same turbo as me ?? what hp u getting outta ya mr2 ??
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I have a real car, a sprintah!!
And the cars not running yet.......fuggit
And the GT30's effeciency zone starts at around 25psi, so wind it up!!
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 11:04
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i dunno .. the dyno graph just says lbs .. 1700
25 psi .. i had a few boost conrtolling issues .. ill sort them out .. also .. dunno if stock motor will handle it .. i might build a strong one . as i have a spare 1jzgte that ows me .. $0 so i throw some forges into that and fresh that rest and give it to her .. 450 rwhp ?? maybe
let me know if u know someone trustworthy to build the 1jz
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Location:
Perth
Registered:
October 2003
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 12:05
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Post up your dynograph if you can, from that i can tell you exactly how much peak torque it has at the wheels, or tell me how much power is being produced at your peak torque and what RPM that is at.
Good to see your getting there, I might go to SST too!. BTW if you need a good clutch I can tell you where to go.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 12:23
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Don't forget when working out that torque to cater for torque multiplication through the gearing.
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Location:
Sydney
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 13:48
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ppl run 10's on standard internals in jap!!! you dont need forgies for 450horses man!!! boost controling issues???? speak to celicamad!!! i might be going for that turbo as well soon if i dont sell the cressi off soon do they spool up quickly???
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Tue, 08 June 2004 14:58
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id lik to be able to paste pics on here but i cant ..
as for spooling fast .. id say yes .. its spools hard and fast .. but im yet to drive it hard yet as it was pissing down when i drove home , and im not game enough to do stupid stuff in the wet . ill wait for a dry day .
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Location:
sunny coast, qld
Registered:
October 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 06:40
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just wondering if there have been any updates on the driveability with this turbo?
thanks
Chris
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 06:50
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DRIVABILITY ?? in the wet .. forget it ..
ive only done 200kms since the tune , it stalls at every set of lights so i have got it booked in to fix it .. but i dont drive it until it gets fixed ..
i drove it once in the dry .. 2nd gear .. no traction .. havent tramped it in 3rd yet ..but id say no traction too ..
it hits full boost at 4000 rpm . the the shift light comes on nearly straight away .. it just revs that quick when u have no traction ..
by the way im running 18x 265 brand new fallken tyres . so it not a tyre choose problem ..
i would hate to think how it drive with stock cheese cutter hilux rims and tyres .. would be very dangerous
retuned on monday , so i will keep posted on new figures ..
i will go 24-25 psi as well .. see how she holds up to that !!
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Location:
sunny coast, qld
Registered:
October 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 08:01
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I would definitely believe the lack of traction thing! Jag7799 said his was wheel spinning in third gear too so I think yours definitely would be with about 100rwkw more than him  Mine was wheel spinning into third with the auto also and stock twins
Sounds like it is time to whack on some 15's with some slicks and take it to the strip!!! 
With your setup, I think you have the potential to be one of the fastest 1jz's in OZ. If it is only 1350kg and has nearly 300rwkw that is a bloody good combination!
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 08:47
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my hilux used to weigh 1250 kgs dry ( well that is what rego papers say ) but i have tanken it onto a weigh bridge with the 1jz and its weighs 1440 kgs , but i had spare wheel, jack , towbar and rear step and tools and stuff cause i was on the way to drags .. so i would say it weighs about 1380-1400 kgs now . and with 400 rwhp i doubt its the fastest 1jz in aust , there is a fair few 1jz out there , and mine aint drag setup .. calulater says 11.7 with weight and hp .. but lows 12's is more realistic ..
yes drags very soon , just wanna finish some things off and buy some slicks , month or 2 .. then it will go down .. b4 hot weather comes back ..
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 10:46
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Hehe, you gotta beat 11.3 @ 122mph if you want the fastest 1j ute even!!
The JT Racing Navara ran last night, with great success.
Still a lot more to come.
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Location:
newcastle
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 11:32
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Yeah a little bird told me he missed 3rd gear too
oh yeah and well over $50 h.p @ wheels on stock internals
well done Jamie
slylux
your 1700 ft pounds is tractive effort so not a true torque figure there is a formula for converting .but i dont have it .your dyno guy SHOULD know
AS MANNY said .. he has 400rwhp with stock fuel rail . lines and regulator ..
no doubt it can be done on stock reg but there are distinct advantgaees in increasing fuel pressure to achieve better atomisation
if you would like some help with boost control issues im happy to help.just tell me what its doing . i have set up a few similar setups with no probs at all
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 13:27
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i belive that navara has the exact same turbo as mine .. but he is running methonal . ? also .. what booost is he running to get 450rwhp ??
also .. i dont think ill ever beat 11.3 . our track in WA is slowest in aust .. never prepped properly . but i didnt build this car for drags .. i built it to put my motox bikes on the back and go to and from racing .. im sure it can do that now .
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 14:03
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| slylux wrote on Thu, 24 June 2004 21:27 |
i belive that navara has the exact same turbo as mine .. but he is running methonal . ? also .. what booost is he running to get 450rwhp ??
also .. i dont think ill ever beat 11.3 . our track in WA is slowest in aust .. never prepped properly . but i didnt build this car for drags .. i built it to put my motox bikes on the back and go to and from racing .. im sure it can do that now .
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Since when?
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 14:56
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i just dont lik the plex . it seems that the track isnt maintained properly . sea breeze and sand probly doesnt help .. its lots of hard wok to maintain and they only prep track for big races .. ive only been down on wednesdays and slippery ..
maybe i should have a go at a proper prepped track and i might have different veiws ..
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Location:
Adelaide
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 21:28
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Nice work there mate. I reckon that your car should pull an 11, and with slicks on and and another few RWHP you'd have a shot at 11.2. What sort of ECU are you running?
Sean
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: why doesnt my 1jzgte make any power ???
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Thu, 24 June 2004 22:32
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The Navara made 460+ rwhp on pump fuel @ 20 psi.
It has since been road tuned and refined to produce noticably more HP under those conditions.
Wednesday night it was running avgas and 28 psi!!
Anyone want to guess at a HP figure ?
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Location:
Wollongong
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Fri, 25 June 2004 01:06
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| celicamad wrote on Thu, 24 June 2004 21:32 |
no doubt it can be done on stock reg but there are distinct advantgaees in increasing fuel pressure to achieve better atomisation.
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Can you please elaborate on this ?
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Location:
sunny coast, qld
Registered:
October 2002
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Re: why doesnt my 1jzgte make any power ???
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Fri, 25 June 2004 02:31
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| Soarer wrote on Fri, 25 June 2004 11:06 |
| celicamad wrote on Thu, 24 June 2004 21:32 |
no doubt it can be done on stock reg but there are distinct advantgaees in increasing fuel pressure to achieve better atomisation.
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Can you please elaborate on this ?
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I too would like to know about thise
You are using 550cc injectors right Slylux? increased fuel pressure or not? Sorry, if you have already answered this, but I have a shocking memory
And does the Navara Ute run a GT30 .82 rear like Slylux or not?
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Location:
I wanna go Hawaiiiiii.......
Registered:
November 2003
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Re: why doesnt my 1jzgte make any power ???
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Fri, 25 June 2004 22:44
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No the Navara runs a GT3540 with .82 rear and custom front housing / wheel.
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Location:
Brisbane
Registered:
July 2002
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Location:
newcastle
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 26 June 2004 05:46
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Increasing fuel rail presure can improve atomisation of fuel .
By increasing 1j fuel rail pressure .We found that particularly in high boost situations that a more complete burn was created . and the whole power curve was a little fatter . the biggest gain was we where able to run a little more boost without detonation . where previously detonation was present .
1j ignition system doesnt like too much boost the pressure is attempting to extinguish the spark . with a nice tight plug gap and a little more fuel pressure some small gains where made
The Navara runs some avgas but this is really only a prevention against detonation .The turbo will flow a fair bit more than your gt30 .its rated at around 600-620 h.p with 0.82 rear
and 700 with 1.06 .
i still think youll find your problem is timing .with around 18-20 psi you should make your 400 hp @ wheels.
TRACTION
you conststant hear comment like ive got no traction now etc .
it ALL about setup and ratios tyres etc . if you have big power then you cant use low profile tyres and expect traction .
the side wall size and stiffness is more important than the tyre
My cressida constantly chops more powerful cars because i run 225/55/16 yokahama avs v107 . once warm they stick like shit and with CORRECT pressures i can launch at 2800 rpm with no more than a light chirping sound of wheelspin .
with a 4.69 0-100 from around 200 kw @ wheels in a 1520 kg car(with my big arse as well)
the 8.58 1/8th mile run a dubbo was with a FULL boot of tools and all sorts of shit
ALTHOUGH obviously my boost controller helps with these times
if you want dropped on its guts low profile tyre look then you wont get good traction . im currently playing with spring rates now to improve traction even more .
the Navara is on its 3rd 9 inch diff and i think 3rd set of slicks .Is a development process . it WILL run 10's very soon
another well known newcastle 1j running mid 12's runs 25 kg of weight over each wheel . the traction difference is AMAZING .
and on lazy launches the weight difference make no differnce to times
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Location:
newcastle
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 26 June 2004 05:50
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oh yeah i think 450 h.p @ wheels was around 20 psi .
But its making a LOT more than 450 now !!!!!!!!!!!!!!!!!!!
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Location:
On your mum!
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 26 June 2004 08:26
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| Special Ed wrote on Fri, 25 June 2004 08:32 |
The Navara made 460+ rwhp on pump fuel @ 20 psi.
It has since been road tuned and refined to produce noticably more HP under those conditions.
Wednesday night it was running avgas and 28 psi!!
Anyone want to guess at a HP figure ?
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459?
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Location:
Brisbane
Registered:
July 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 26 June 2004 11:55
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| celicamad wrote on Sat, 26 June 2004 15:46 |
Increasing fuel rail presure can improve atomisation of fuel .
By increasing 1j fuel rail pressure .We found that particularly in high boost situations that a more complete burn was created . and the whole power curve was a little fatter . the biggest gain was we where able to run a little more boost without detonation . where previously detonation was present .
1j ignition system doesnt like too much boost the pressure is attempting to extinguish the spark . with a nice tight plug gap and a little more fuel pressure some small gains where made
The Navara runs some avgas but this is really only a prevention against detonation .The turbo will flow a fair bit more than your gt30 .its rated at around 600-620 h.p with 0.82 rear
and 700 with 1.06 .
i still think youll find your problem is timing .with around 18-20 psi you should make your 400 hp @ wheels.
TRACTION
you conststant hear comment like ive got no traction now etc .
it ALL about setup and ratios tyres etc . if you have big power then you cant use low profile tyres and expect traction .
the side wall size and stiffness is more important than the tyre
My cressida constantly chops more powerful cars because i run 225/55/16 yokahama avs v107 . once warm they stick like shit and with CORRECT pressures i can launch at 2800 rpm with no more than a light chirping sound of wheelspin .
with a 4.69 0-100 from around 200 kw @ wheels in a 1520 kg car(with my big arse as well)
the 8.58 1/8th mile run a dubbo was with a FULL boot of tools and all sorts of shit
ALTHOUGH obviously my boost controller helps with these times
if you want dropped on its guts low profile tyre look then you wont get good traction . im currently playing with spring rates now to improve traction even more .
the Navara is on its 3rd 9 inch diff and i think 3rd set of slicks .Is a development process . it WILL run 10's very soon
another well known newcastle 1j running mid 12's runs 25 kg of weight over each wheel . the traction difference is AMAZING .
and on lazy launches the weight difference make no differnce to times
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some people care a little about handling though and not all out drag prowess
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Location:
newcastle
Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 26 June 2004 12:55
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| Quote: |
some people care a little about handling though and not all out drag prowess
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Agreed i guess you need to find the balance that suits you .between how well you want to handle versus how much traction you have .
But and the end of the day without traction nothings going to handle well around a corner on full power.
im not knocking anyone elses setup im just saying if you want traction it IS available .
and the avs vs107 are used in circuit racing .they are designed so that they can be pumped up to 45 psi recommended pressure for circuit racing. at this pressure the side wall flex is actually less than the old a008s had with a 45 profile
in fact the tickford te50 club use them on thier track days
a v8 supercar weighs around 1200 kg with about 650 h.p . seem to handle ok too.
The navara ute is setup for circuit racing and handles AMAZINGLY well. still manages to almost lift the front wheels off the ground on launch too
ANYONE get vids??????????
yellorolla
heheee i thought at least 600h.p??????????????
you got that new turbo fitted yet???
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: why doesnt my 1jzgte make any power ???
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Sat, 26 June 2004 14:00
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V8 supercars weight more than 1200kgs... 1435kgs is the minimum required weight from memory?
but yes, they handle nicely - that's what you get for having super sticky slicks, best suspension money can buy, and a camber usually only seen on mirages with the springs removed 
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Location:
perth WA
Registered:
January 2003
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Re: why doesnt my 1jzgte make any power ???
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Sun, 27 June 2004 00:26
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i think i will upgrade to malpassi fuel reg , i can see too much harm , also i can get them new for $160 is this cheap ?? if anyone can do better please let me know ,
as for a few questions i saw about what setup im running .. all is explained in the first few posts .. just scroll to top of screen so i dont have to explain again ..
i have already got 397rwhp but next time i go for tuning ill put in some more boost 1.7bar ( 25 psi )
end of the day that navara is goin to flog me in times and horsepower .. but that is not my only goal ( hp )
and not only that its a f*^%king crossbreed ... yuk !!haha
JAG 7799 , have u put your car on a weigh bridge and checked 1250kgs ?? u might get a big surprise if u havent .. im not sure what soarers weight . but it costs 5 bux to check the weight and its good for calculations and stuff .
ANYWAY keep us posted on the navara !! i will be changing a few things on my car so nothin will happen for a few weeks ..
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Location:
Brisbane
Registered:
July 2002
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Re: why doesnt my 1jzgte make any power ???
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Sun, 27 June 2004 13:13
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my other one was weigh bridged at around 1170 before rims
with a 1g geu.. so add a bigger engine and rims and thats just a guess
but minus a few things too
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Registered:
June 2002
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Re: why doesnt my 1jzgte make any power ???
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Tue, 29 June 2004 06:40
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SLYLUX:
I would love to see your Dyno Graph.
Did you get the boost curve logged also??
If you can't post it up could you email it to me??
glen@bimmersport.co.nz
397rwhp must be a handfull, I know my 292rwhp took a bit of getting use to!!
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