greddy wasgate help! Whats the most psi and least psi i could run
10-10-2005, 10:41 AM
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greddy wasgate help! Whats the most psi and least psi i could run
I have a full greddy turbo kit and next month will be puttin it on i was just wondering what psi the wasgate was ajustable to? whats the most i could turn it up to on the wasgate and whats the least?
10-10-2005, 05:14 PM
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Re: greddy wasgate help! Whats the most psi and least psi i could run (lshatch1.8)
If it is the 18g kit, the boost is set at 7.8 psi. You cannot go any lower than that. To raise the boost, buy a boost controller.
The amount of boost you can increase it to depends on how built the motor is and how much fuel you have for the extra air. I wouldn't go any higher than 8.5 psi with the 310cc injectors supplied. If you upgrade to 440cc injectors, you could run around 10-12 psi depending on fuel management, tuning, and age of the engine. Much past 16 psi with built internals and larger fuel injectors, the small Greddy turbo will just be blowing hot air instead of creating more power.
The amount of boost you can increase it to depends on how built the motor is and how much fuel you have for the extra air. I wouldn't go any higher than 8.5 psi with the 310cc injectors supplied. If you upgrade to 440cc injectors, you could run around 10-12 psi depending on fuel management, tuning, and age of the engine. Much past 16 psi with built internals and larger fuel injectors, the small Greddy turbo will just be blowing hot air instead of creating more power.
10-10-2005, 05:24 PM
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Re: greddy wasgate help! Whats the most psi and least psi i could run (Das Schmoo)
Even with a Hallman MBC and the stiff spring, the Greddy wastegate actuator will spool to 15+ then fall back off to 12 lbs or so. Get a Forge wastegate actuator or add a small spring between the flapper arm and the actuator bracket to increase spring pressure.
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10-10-2005, 07:27 PM
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Re: greddy wasgate help! Whats the most psi and least psi i could run (nfn15037)
thanks for all the replys but i know its ajustable from the wasgate and was wondering if anyone knew how high it could go up.. if anyone knows let me know if not i guess i will find out soon 
10-10-2005, 09:05 PM
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Re: greddy wasgate help! Whats the most psi and least psi i could run (lshatch1.8)
You can tighten the actuator arm, yes. All this does is make it so the wastegate will not open all the way, making the boost creep higher. The spring pressure will always be the same no matter what you do. You can run it tight and let it creep up to your desired boost level, but you will be missing a lot of midrange power. Just go with the extra spring trick or a decent actuator (like a Forge motorsports one). I have run as high as 21 psi on mine, but it cant even hold 15 psi even with a good MBC, it simply needs a stronger spring to hold the WG shut.
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