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Registered:
November 2002
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 1JZ-GTE
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Wed, 28 January 2004 01:52
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Here is the scenario:
1992 Toyota Supra JZA70 with a manual gearbox and 1JZ-GTE
K&N Air Filter
Greddy Profec B Spec Boost Controller
Greddy Boost Cut Defender
Blitz Blow off Valve
Stock ECU
HKS Speed Limiter Defencer
HKS Catback Exhaust System
Ok Boost was set a 13 PSi at low and 17 Psi on the electronic boost controller. At certain times we noticed that the car began pinging,so we backed up the boost to 15 psi. On a serious run against an Evolution the boost was then increased (out of Anxiety) both cars zoomed down the road, suddenly on return the car started sputtering and smoking. The engine miss fired and There was a knock (a terible one at that) we have began disassembling the engine and noticed that there is some oil in the pipe carrying compressed air from the intake to the turbo,nothing much just a film. We didn't notice any damage done to cylinder head. The block there were two fried pistons.No serious damage to the bore.
What do you think should be done?
Replace the engine at the cost of $1500 not including customs duty?
OR
Buy replacement parts for 1JZ-GTE $1397.00?
Anyway what can we do to avoid this problem from occuring again since we intend to run at high boost after the engine is rebuilt.
Anyone who is running boost of above 14.5 Psi on a 1JZ-GTE please let us know.
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Location:
nz
Registered:
July 2003
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Re: 1JZ-GTE
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Wed, 28 January 2004 02:11
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hi there sum friends of mine hav jst had a similar thing happen running 16psi sim mods but fmic and full length exhaust and steel turbines severe damage 2 all pistons damage to all big ends very bad on 3 and 5 in this case it seemed to be fuel pump failier as they hav been drag racing 4 2 seasons with no probs.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZ-GTE
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Wed, 28 January 2004 02:34
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was your a gen1 or gen2 1jz-gte?
also if you're going to run that much boost, it's usually a good idea to get a good fmic to help the life of the car
I must say I'm suprised you fried the internals - the 1j is famous for being a pretty tough beastie - I run mine on 15psi all day every day, and some of the newcastle boys run theirs on 17psi every day
re the replacement parts - are you guys going to do the install yourself? if so I'd probably do that - at least you know the engine is pretty much new, and all is good. Does "No serious damage" mean you dont plan to do anything to it, or will you need to bore it out and put oversize pistons in?
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Registered:
March 2003
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Registered:
November 2002
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Re: 1JZ-GTE
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Wed, 28 January 2004 05:15
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Keep them coming I am taking serious notes on your suggestions,thinking about ECU though,
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Location:
Brisbane
Registered:
May 2002
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Re: 1JZ-GTE
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Wed, 28 January 2004 05:49
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Um, isn't the 1JZ MAP sensor only good for 1 bar (14.7psi), meaning it leans out above that point? In any case your description of "fried pistons" definitely sounds like a lean out...
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Location:
UK
Registered:
May 2002
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 1JZ-GTE
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Wed, 28 January 2004 13:38
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lean out - ping - cooked pistons - flung a big end bearing also perhaps?
naughty naughty 
id be rebuilding it, and making the most of the oportunity to get a few things done right. and if this is how you drive, i dare say its about time 
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Registered:
November 2002
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Re: 1JZ-GTE
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Thu, 29 January 2004 04:02
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Ok Contacted HKS for a Metal Head gasket,
is a 2mm thick stopper headgasket ideal,or should it be replaced wit a stock gasket.
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Registered:
June 2002
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Re: 1JZ-GTE
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Thu, 29 January 2004 20:38
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| Quote: |
I must say I'm suprised you fried the internals - the 1j is famous for being a pretty tough beastie - I run mine on 15psi all day every day, and some of the newcastle boys run theirs on 17psi every day
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I'm also quite surprised!!!
What fuel were you running in it??
Here in NZ I run 96 or 98 octane.
One thing that is a common prob here in NZ, not with 1JZ's that I know of, but Subaru STI's etc... that come from japan with "chipped ECU's" is they run too much ignition advance and usually detonate them selves to pieces because of the lower octane fuel, I think they have 100 or 105 in Japan.
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Location:
UK
Registered:
May 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 00:07
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the stock engine is fine at 15 psi (as long as you get round the fuel cut that is)
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Location:
Sydney
Registered:
July 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 04:03
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my series 2 1JZGTE 370cc injectors maxed at 14psi.
I now have Jap Spec 2JZGTE 440cc injectors and run 17psi with no problems. R33 GTR Fuel Pump also fitted at the same time.
Got 201 Rear Wheel Kw on first dyno run... (shootout mode)
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Location:
UK
Registered:
May 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 12:02
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aaagh there is no such thing as a series two. Its just a valve without a bend in it, and a tube.. hardly a major engine overhaul. All this ser1 and ser2 stuff just confuses newbies.
Anyway, 440's are fine with the stock map sensor, but it means you have no safety cutoff on the boost.
550's and a 2JZ map sensor is ideal.
Have you got any details on the R33 fuel pump mod? 
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Location:
Sydney
Registered:
July 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 13:38
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| HedgehogSandwich wrote on Fri, 30 January 2004 23:02 |
aaagh there is no such thing as a series two. Its just a valve without a bend in it, and a tube.. hardly a major engine overhaul. All this ser1 and ser2 stuff just confuses newbies.
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Dude, there are different models of 1JZ, one is twin turbo, then from 1997 onwards, it is single turbo.........
people need to know this......
Plus mine has traction control, and a few other things differnt from the earlier model......
Regarding the GTR fuel Pump, just take your original one out, and unclamp the hose, put the GTR one in, clamp the hose, and away you go... very easy.
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Location:
Sydney
Registered:
July 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 13:39
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Plus the later model is VVTi .....
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Location:
Sydney
Registered:
July 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 13:41
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| HedgehogSandwich wrote on Fri, 30 January 2004 23:02 |
Anyway, 440's are fine with the stock map sensor, but it means you have no safety cutoff on the boost.
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What are you talking about ?? I put 440cc injectors in, and still hit boost cut until I installed a Boost Cut defender (now run 17psi) not sure where you got your info from......
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 13:46
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no no
the vvt-i is another engine entirely
the standard 1jz-gte non-vvti has 2 distinct types, with a few minor difference in piping and a valve
traction control was also available on the non-vvti 1jzs
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Location:
Sydney
Registered:
July 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 13:48
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ok, but the single turbo VVTI later model is still called the 1JZGTE......
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 13:58
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oh, yeah of course
but it's totally different to what we're talking about
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Location:
Sydney
Registered:
July 2002
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Re: 1JZ-GTE
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Fri, 30 January 2004 14:07
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Got ya, sorry to throw us off on a differnt tangent... I just think it is wierd they still call the VVTi single tubo the 1JZ.... you would think they would name it differntly....
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Location:
UK
Registered:
May 2002
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Location:
nz
Registered:
July 2003
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 Re: 1JZ-GTE
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Sat, 31 January 2004 04:33
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Hey hedgehog that sounds real sim to lexus upgrade on 7ms? wen you say j spec i take that is jap spec wat kinda power could you make with the standard 1j ecu j spec rz map and 510-550cc injectors im very interested b cause they seem to get alot more outa the 7ms like that. and wen you say map goes to 18psi is the 1j ecumapped that far or does it jst move the whole scale back? on that thought does anyone hav the part no. 4 a j spec map sensor?
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Location:
UK
Registered:
May 2002
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Location:
Brisbane
Registered:
November 2002
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Re: 1JZ-GTE
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Sat, 31 January 2004 13:09
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Wohoo! I'm about to have even more people think I'm a wanker!
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was your a gen1 or gen2 1jz-gte?
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I am going to bitch-slap the next person that mentions anything about gen1 or gen2 because it's all a load of crap. I guarantee that if you went to Toyota and cross-referenced every single part number between your beloved gen2 and the horribly unreliable gen1 engine you will find that there are basically no differences whatsoever.
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aaagh there is no such thing as a series two. Its just a valve without a bend in it, and a tube.. hardly a major engine overhaul.
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I'll drink to that!
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Got ya, sorry to throw us off on a differnt tangent... I just think it is wierd they still call the VVTi single tubo the 1JZ.... you would think they would name it differntly....
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Agreed. Going by Toyota's general naming standards, the Single Turbo VVTi engine should probably have been dubbed the 3JZ... but that said the IS200 runs a 1G still... and I'd say that there's been a re-hash of the engine 20 years after the fact!
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id be rebuilding it, and making the most of the oportunity to get a few things done right. and if this is how you drive, i dare say its about time
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Personally, I feel that someone who pops their engine running a tune that they know will damage their engine should be shying away from owning a modified car. My opinion is that he should repair the engine in the cheapest way possible and then to sell the car and buy something standard.
The other option is to rebuild the engine (don't pay someone, it's a great learning experience!) and to read up on cars and terms like 'pinging' so that you know why your last one blew up.. and how to stop your new one blowing up too.
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I must say I'm suprised you fried the internals - the 1j is famous for being a pretty tough beastie
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ATTENTION PLEASE!!
A common misconception seems to be that people thing a mal-tuned engine blowing up means that an engine's power-handling capabilities should be questioned.
Why don't you understand?
This 1JZ did not fail because it was weak or unable to withstand 17psi. It failed because it was treated incorrectly. You can have a $20,000 bottom end and it will STILL fail if treated like this. If you don't believe me, try it - to your detriment.
The 1JZ is an incredibly strong engine, known to take 600hp (and possibly more, but most people go for the greater capacity of the 2JZ when chasing numbers this high) on a factory bottom end. However, you can blow up a completely standard 1JZ by having the timing set incorrectly or by leaning it out (eg fuel pump failure).
[Updated on: Sat, 31 January 2004 13:32]
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Location:
Brisbane
Registered:
May 2002
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Re: 1JZ-GTE
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Sat, 31 January 2004 15:33
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| 7M-Brisbane wrote on Sat, 31 January 2004 23:09 |
Agreed. Going by Toyota's general naming standards, the Single Turbo VVTi engine should probably have been dubbed the 3JZ... but that said the IS200 runs a 1G still... and I'd say that there's been a re-hash of the engine 20 years after the fact!
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Just to nit-pick, the 1JZ-GTE VVTi is in keeping with Toyota's naming standards. The first number refers to the engine's bore and stroke dimensions, and even if the engine changes radically the number will stay the same if the bore and stroke is the same There are one or two minor exceptions, but that's how it generally works.
A good example is the 4A engines; the first of the 4A's and the last of the 4A's have nothing in common, every single major component is different (including the block casting). However, the bore and stroke has always been 81x77 so it remains a 4A!
This concludes today's lesson.
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Location:
Gold Coast
Registered:
May 2002
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 1JZ-GTE
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Sat, 31 January 2004 22:49
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He did say one or two exceptions  I think it was to do with the fact the 6M was a stopgap between the 5M and the 7M, with the early 6M's using 5M style blocks.
As for the other one...don't look at me
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Location:
nz
Registered:
July 2003
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Re: 1JZ-GTE
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Sun, 01 February 2004 05:09
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Hmmm so runnin the jspec map with 550cc inj mutch the same as runnin 440cc inj on 1j map. ive tried that and found it wrked ok jst a bit ritch as ud exspect. sounds like a gd solution though mayb with a apexi super afc2 or emanage.
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Location:
UK
Registered:
May 2002
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Location:
nz
Registered:
July 2003
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Re: 1JZ-GTE
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Sun, 01 February 2004 23:20
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instead of buying export model 550s im jst going to get my injectors highflowed rz 440 can be highflowed up to 850cc or anywhere in between. 100$ NZ each less complicated than fittin resistor pack gunna get mine flowed to 550s should do 500hp comfortably. in be easy enough to tune not to big lol. so with 550s rz map 1jecu and 18psi limit wat kinda rwkws should b possible? with dif turbo/s fuel pump ect
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Registered:
March 2003
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Re: 1JZ-GTE
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Tue, 03 February 2004 09:12
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| robs wrote on Mon, 02 February 2004 10:20 |
instead of buying export model 550s im jst going to get my injectors highflowed rz 440 can be highflowed up to 850cc or anywhere in between.
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what do you guys advise when it comes to high-flowing injectors?
are there any adverse effects?
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE
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Tue, 03 February 2004 11:12
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hiflowing injectors, fitting bigger ones.. people have first gotta work out whether or not they even need it as the current fuel system may be able to provide enough fuel.
HIGH power application need such changes.
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Registered:
March 2003
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Location:
Brisbane
Registered:
November 2002
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Re: 1JZ-GTE
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Tue, 03 February 2004 13:52
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Anyone making up over about 350 flywheel horsepower should really be getting close to fitting new injectors to their 1JZ.
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Location:
nz
Registered:
July 2003
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Re: 1JZ-GTE
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Wed, 04 February 2004 04:38
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Re H/F injectors after talkn to venom performance about gettin injectors highflowed it seems to depend on the desighn and diferent types of injectors aparently there is no detrimental affects other than goin to very big injectors of the high impedence variety eg rz 440 to 880s can bcome more dificult to tune in some aplications as they do not open quickly enough aparently this depends alot on the type of engine managment used as well also roughly speaking on a 6 cylinder at approx 30-35psi base fuel pressure u will get the ccrating of a single injector eg 1j 380s as your max flywheel hp at 100% duty cycle usually most people run about 80-90% max duty 4 safety margin hence about 350 hp at/fw
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