I'm currently running the lovefab gt1 kit with the 7 psi spring in a tial 44mm wastegate. I dyno'ed my car and experienced massive boost creep from about 7-10.2 at redline. I swapped out the 7 pound spring with a 5 pound and am still boosting about 10 psi at redline. I am running a dump tube on my wg and would like to know if there are anyways to alleviate the boost creep.

 

im running inlinepro and have 7 pound spring and i see about 10.5

even w/ manual boost controller i still see about 9.

Looking for leaks at this point but still havent found any.

 

Do you have a manual boost controller? If not, try getting one, it should help control the boost a bit better.

 

Possible problems,

Manifold design
manifold design vs size of turbo
other turbo piping
bad spring in wastegate
bad boost controller
bad wastegate

I don't think I am missing much here.

When my car was done the first time at Full-Race it was a faulty tial Wastegate. Once that was done the car held 7psi with no problems.


-chris

 

I am running apex avcr electronic boost controller and still see 10 psi at redline. I checked all the vacuum hoses and everything. I even changed the spring to 5 psi and still see the exact same amount of boost. Is it possibly my wastegate then? Because other gt1 users have the same exact manifold design as me and they don't seem to have nearly as bad as a boost creep as me.

 

Remove the boost controller since you aren't using it anyways and then see if that helps.

 

I turned it off and also tried a low boost setting like around 5 psi or something. The psi is still the same independent of the boost controller...I am all out of ideas =\

 

off as in the vacuum lines are disconnected right?

 

Off as in turned the avcr off as in disconnecting the power wire. I would ultimately like to get the boost creep to a minimum with a smaller spring and boost it up later for racing etc..

 

in my opinino this is because you need an Electronic Boost controller. There are a few different kinds out there, there are some good expensive ones that will 'self learn' etc. You will need your tuner to set in (usually) 3 different boost settings, low/mid/high and because their electronic and work off your ecu it shouldn't fluxuate more than 0.1 psi

good luck.