I have a 7 pounds spring and it is causing me to boost 12psi with my new greddy boost electronic controller on the lowest settings, im wanting to stay in the 10 to 11 range I was told i needed a smaller spring, any have any experiance with this. thanks

Brandon

 

This is interesting... I have the Tail 38mm 10lbs spring with Greddy Profec B - Spec 2 Electronic Boost Control. My boost control is set at 10psi and I spike to 12psi... So I would like to know the anwer to your question also...

Are you spiking or creeping?

Boost Creep:
Boost creep is rising boost due to not enough exhaust bypassing the housing. For example, you're set for 13 psi, and when you floor it, you get a quick rise to 13 or 14 psi. But then as rpm's climb, the boost creeps higher and higher: 14, 15, 16, 17, etc. Enlargening the wastegate hole is one way to cure it...


Boost spike:

Spiking is when your wastegate hole is large enough, but your actuator can is taking too long to fill with compressed air, so you *temporarily* overshoot your boost level. Example: you're set for 13 psi, and when you floor it it quickly rises to 16 psi, but then gradually drops downward towards 13 psi again.

I have one of my friends coming by this weekend to help me adjust my controller. I'm not to familar with the unit, being that I bought the car with the turbo and everything in it.. But I think the Greddy boost controller can retard or knock the boost down and also you can set the the gain to control the way the turbo kicks in...

 

I have it all set to 0 on everything, I can floor it and it will go to now nothing quick just goes past the 10psi i have it set to and the warning light will not ever go off or flash red. I don't know what my problem is, I was told that a lower waste gate spring will work.

 

Now that i have done some reading i think i might be boost creeping. Still need to find out how to fix

 

I'm having the same issue. I have the warning set at 11psi. My boy is going to show me how to adjust the controller...I will keep u posted. I hope someone will help with this issue....

 

i found the problem had only one vacume line on wastegate. have to have 2

 

Now see i asked you if it was hooked up right lol. Im gad ya got it man.