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Location:
Brisbane
Registered:
February 2003
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Re: New Member - Need Info on Mods for '92 GT4
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Tue, 12 August 2003 11:23
 
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Aussie Exhaust is THE place to go for GT4 exhausts.
See their online store at http://vs84208.server-store.com/store/products/cat egory1.inetstore
Talk to Russell there. He fit my exhaust and did a great job. Its not cheap, but the quality is excellent. And its Australian owned and made.
The pod filter is questionable. For this level of mods, you are probably better off going for a K&N style drop-in panel filter and fit some cold air ducting to the standard airbox.
The GT4 has REALLY high underbonnet temps, so a pod style filter will suck this hot air in and you will lose power.
With the boost controller, any manual one will do for around $85 or so. Remember to cap off the TurboVSV hose, or the ECU will sense something amiss and bleed off (via the VSV) a heap of your boost. Remember also that the VSV acts as a safety measure, limiting boost when the conditions are not perfect. So drive a little smarter (no full boost when cold etc) and there should be no problems. Keep the boost under around 12psi as this is where the factory ECU has fuel maps up to. If you want to hit 15psi you may have to install additional fuelling via a new ECU or piggyback addon. Remember fuel cut comes in at around 12psi as well, so you *may* need to disable that. Its an easy mod which costs around $1 to do. Search the web, the info is out there 
Whiteline should be the people to sort out your suspension for you. They sell a completely developed kit for the GT4, so you know its going to work well. Other suspension places with no GT4 experience probably will make things worse! 
Hope this helps.
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