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Location:
Brisbane - Chapel Hill
Registered:
June 2002
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 1JZ-GTE musings
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Mon, 29 March 2004 14:35
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I recently had my first run-in with a 1JZ conversion ...
http://esteban.meridiantech.com.au/misc/toymods/10 0_1521.JPG
... '98 VVTi single turbo 1JZ-GTE into a VL (dont ask) ...
and I was surprised by the teensy size of the exhaust ports ! not to mention the exhaust manifold to the turbo. The stock exhause manifold even has welded in expansion joints (dont know if this is unusual) I assume the turbo is another CT26 incarnation? - non twin entry, but the manifold at least joins the 3 tp 6 cyls directly before the exhaust wheel. Sorry I didnt snap a pic, but the opportunity is still available for tomorrow-ish.
To me it seems this engine has heaps of potential, but is factory tailored for more sedate duties. Cant wait to unleash the beast in such a light car!
It's almost as if the std exhaust manifold is a factory restrictor (or perhaps it explains that meaty 380nm+something of low-down torque?) Hopefully we can get the bitch going in stock trim, im really keen to see how toyotas late model (well later than anything i usually play with) stock engines perform...
Any thoughts/experiences?
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Location:
Brisbane
Registered:
May 2002
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Re: 1JZ-GTE musings
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Mon, 29 March 2004 23:16
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Yes, all JZ engines have small exhaust ports and restrictive manifolds. The purpose of this is to keep exhaust gas velocity high, thus encouraging quick spool-up. That's the reason a 1JZ is amazingly torquey for a 2.5 litre engine.
And yes, there are plenty of gains to be had by opening up those ports and replacing the stock manifolding with something a bit bigger.
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Location:
Toowoomba
Registered:
May 2002
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Re: 1JZ-GTE musings
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Tue, 30 March 2004 11:26
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Hey Esteban
I fitted a 1JZGTE into a VL two years ago and have almost completed a 1JZGTE VVTi into a Lexus IS200. Come up to Toowoomba some day if you want to have a look.
The VL was an awesome performer in full flight. You will have fun with it.
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Location:
Canberra
Registered:
May 2002
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Re: 1JZ-GTE musings
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Tue, 30 March 2004 12:03
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Hi there Esteban, December last year finished fitting a VVTI 1JZ-GTE into an RA23 Celica. Initial dyno run without any modifications, and 10 psi boost saw, 170Kw@ wheels via W58 manual box.
Masses of FUN! FUN! FUN!
regards Chuck.
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