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Location:
Melbourne
Registered:
February 2005
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4AGTE Conversion
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Fri, 04 March 2005 06:33
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Heya people
I have a early model 4AGZE that I am looking to turn into a 4AGTE. One problem that I have is that the wiring harness for the engine has been chopped in half.
I am looking at running a motec EMS and was wondering if I should look at getting the wiring harness put back together or just make up a new one for the Motec system?
Any Ideas?
The turbo that I have to bung on is a T28 from a GTR.
The car this is going into is a Lotus Seven replica so RWD and will need a fully custom exhaust.
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I supported Toymods
Location:
melbourne
Registered:
June 2002
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Re: 4AGTE Conversion
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Fri, 04 March 2005 07:15
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welcome to the forum, and all that jazz.
i would suggest not putting the loom together as it serves no purpose, just use the ends of the connectors to hook up to the motec.
T28 should be a good turbo, if you arent the type of person who thinks they want "instant response with no lag at all"
also, do a bit of a search in the forum, as there is a lot of info on 4AGTEs around the place.
any car running a 4AGTE will need a full custom exhaust!
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Location:
sydney
Registered:
November 2003
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Re: 4AGTE Conversion
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Fri, 04 March 2005 13:47
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Dont bother with the old harness. You'll find that the new harness that will come with the new computer will have everything you need. Just use the plugs off the old one.
And you'll find that the new harness probably wont need some of the old stuff anyway.
A t28 is pretty good for a 4agte. You dont get much lag.
From my experience i would get a 2.5 inch exhaust for your 4agte. 3inch is a little on the big side.
Good luck with it.
Oh by the way, how will you get it enginered with a 4agte in it? my mate makes these cars and he told me that its hard to get it passed with a 20 valve let alone a gze/gte......
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: 4AGTE Conversion
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Fri, 04 March 2005 14:10
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The GTR T28 has a 0.48 turbine housing and so will spool up very quick while still being able to make reasonable power
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Registered:
February 2005
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Re: 4AGTE Conversion
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Sat, 05 March 2005 01:30
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to small
if your going to run a T28, get one of a GTi-R pulsar.
im running a rx7 turbo in a GTSt exhaust housing and its got little lag.. thats on a low compression bigport ze
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: 4AGTE Conversion
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Sat, 05 March 2005 02:54
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too small? ive seen the GTR turbo on a 4agte make 170 rwkw's
and with minimal lag!
either way.. ive got a T28 off a jap spec S15. wonder hwo that will go on a 20V turbo.. .
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 4AGTE Conversion
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Sat, 05 March 2005 11:23
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on my internally stock smallport (late model) 4age i have an RB25det T28.
10psi comes in around 3000-3500 rpm (thats what boost i run), with a cracked exhaust manifold. cant remember the exhaust housing a/r though....
I think the T28 is a good turbo for the 4agte.
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Location:
Adelaide
Registered:
May 2003
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Re: 4AGTE Conversion
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Sat, 05 March 2005 11:40
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Slightly off topic, has that Seven been registered already? Because if it hasnt the GZE wont comply with the new Euro emissiosn specs which were just (i think March1st) introduced.
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Location:
Adelaide
Registered:
May 2002
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Re: 4AGTE Conversion
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Sat, 05 March 2005 14:31
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Ahhh, a topic somewhat close to Rex's heart.
Lets just say the Euro standard of emissions has not been a blanket rollout policy.
Purchase a wiring loom and sensor kit from MoTeC, then rape the rooted loom for the Injector, CAS and coil plugs.
As for turbo, Your requirements will dictate what you want. For example The car weighs 500kg, do you want 200kw? Rex doubts it.
A single GTR turbo at 10psi will put you in an area of acceleration strictly reserved for the greatest of supercars. Even still you could just boost the 4AGZE. Nothing would beat the instant boost response and pulling power for hillclimbs and motorkhanas.
For a Clubman, that would be Rex's choice, wink, wink.
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Location:
Sydney
Registered:
February 2003
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Re: 4AGTE Conversion
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Sat, 05 March 2005 15:12
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| THE WITZL wrote on Sat, 05 March 2005 22:23 |
on my internally stock smallport (late model) 4age i have an RB25det T28.
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just a correction here.... rb25's came with t3's.... only skyline engine that had t28's were rb26 gtr engines..... i use to be a nissan man.... i'm sorry, hehe.
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Registered:
February 2005
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Re: 4AGTE Conversion
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Sun, 06 March 2005 23:38
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i come to this conclusion from having turboed a few 4age's , and many hondas.
a t25 is way to small. will spool up fast as, and start running out of puff early.
a t28 has the same housings as a t25, unless off a gtr which i belive has a t3 exhaust side flange?? (correct me if im wrong)
id definatly go for some sorta t3 on a 4agze. running a ht18 rx7 turbo in a gtst exhaust housing milled out now, and that has stuff all lag and good pull to limimter!
im sure your turbo will be fine for what you want, but im aiming for 300+hp on my setup 
good luck!!
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Location:
Melbourne
Registered:
February 2005
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Re: 4AGTE Conversion
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Mon, 07 March 2005 02:29
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To Answer a few Questions.
Yes the car is already registered and has been since 1996 so hopefully the conversion and compliance shouldn't give me too many headaches. Anyway it helps having a DOT certifying engineer as a club member...
I'm in the process of building another car as a full ICV (fabricating custom space-frame chassis) to fit the complete drivetrain and engine from a Skyline GTR into a Lotus 11 body shape (500kg car, AWD and 300+kw but thats another story). So I'm not too worried about a small engine conversion.
I'm not wanting a huge amount of power out of the engine as in a 500kg RWD car it would become almost undrivable. I run a quaife LSD in the diff with a 7inch ford Escort crown wheel (4.444:1 ratio) all this is in a cast alloy IRS unit. With all of this i can still smoke both tires at will. Wider rears will be a must for the 4AGTE.
With the bog stock 86kw engine it already runs low 14sec 1/4 miles so i don't really need to be trying to get 200kw out of the engine to make it go fast. It would be interesting though...
The reason i cant use the supercharger is that as it hangs off the side of the engine it is smack in the way of the steering column. I could modify the steering system but a turbo engine may make it more driveable as the small(??) amount of lag with a T28 may allow for some traction as opposed to the instant torque from a supercharged engine.
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I supported Toymods
Location:
Adelaide
Registered:
July 2004
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Re: 4AGTE Conversion
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Mon, 07 March 2005 03:12
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| 1598cc wrote on Mon, 07 March 2005 10:08 |
i come to this conclusion from having turboed a few 4age's , and many hondas.
a t25 is way to small. will spool up fast as, and start running out of puff early.
a t28 has the same housings as a t25, unless off a gtr which i belive has a t3 exhaust side flange?? (correct me if im wrong)
id definatly go for some sorta t3 on a 4agze. running a ht18 rx7 turbo in a gtst exhaust housing milled out now, and that has stuff all lag and good pull to limimter!
im sure your turbo will be fine for what you want, but im aiming for 300+hp on my setup
good luck!!
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GTR's have a T25/28 exhaust flange which is the same as a T25 or T28 off an S13-S15 sivlia, not T3 flange, and the exhaust housing is tiny which would be perfect for the 4AGZE, as it would mean very quick response and the ability to still achieve around 150-170rwkw
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Location:
sydney
Registered:
November 2003
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Re: 4AGTE Conversion
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Mon, 07 March 2005 07:41
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You can make 170 kw with a t28
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Location:
Adelaide
Registered:
May 2002
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Re: 4AGTE Conversion
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Mon, 07 March 2005 14:51
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Could hang the S/C off the exhaust side, custom jobbie
Rex believes that the instant linear torque delivery of the S/C would be beneficial. The engine does what it does smoothly. Turbo on the other hand would have you with traction but unless you ease off the throttle when boost starts build wheels may start to spin big.
Or
Some aggressive cams, quad throttles, light weight internals and more compression. BOO YAA!
OR!!!
http://www.ozclubbies.com/phpBB2/viewtopic.php?t=2 240
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Banned user
Location:
ADELAIDE - The Drift City
Registered:
July 2002
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Re: 4AGTE Conversion
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Mon, 07 March 2005 14:56
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T28's come with two different sized exhaust housings. the 0.48 and the 0.64 size (i think)
the smaller is from GTR engines and the larger is from S14/S15 japspec cars
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