Greddy Profec Spec B II creep problem

[bigal07]

Ok, i just put a profec on my 95 gsx. When i go WOT the boost goes to 10 lbs then at 4000 rpm the boost starts to increase until 17 lbs and i hit fuel cut due to stock injectors. I've tried turning all the settings up and down all over the place, nothing seems to work. One hose is connected to the wastegate actuator and the other on a nipple that i put on the j-pipe. My mods are Evo 3 16g, xl greddy front mount, walbro 255, full 3 inch exhaust, intake, bov.

 

[1gDSM4g63]

Why do you have Walbro 255LPH while you're still using stock fuel injector? With a 16g you don't need 255LPH. If you do you got to have bigger fuel injector, fuel pressure regulator, and a Keydiver chip, SAFC, or DSMLink to eliminate the fuel cut. Furthermore you don't need an ACT 2900 clutch. With a 16g your car is never going to be capable of what a 2900 is made for. It will probably hurt your transmission. It will be better if you read the tech upgrade path rather than adding upgrades your don't need.

 

[CanadianTSi]

The Creep has nothing to do with the Boost Controller. You need to port the Turbo and o2 housing to get rid of the boost creep.

Do a search and you will find all the Info you need.

 

[erald01]

I have the same problem with my boost spike, i have the Greddy BC and its horrible. My boost spikes to 17 and holds at 10. I think its the GReedy prof specII that is not working properly.

 

[bigal07]

To answer 1g's question, i have the walbro in the car because i plan on getting dsmling and 780's but will still have the boost creep problem, and to canadian tsi, with the stock turbo it would hold at 12 lbs steady, no fluxuation at all, could it be the turbo or the manifold? I have a tubular manifold by the way

 

[diablos991]

One thing about the Profec B Spec 2 that is commonly over looked is the fact that you have to pull it out of "sleep mode" upon startup. I had to call Greddy tech support to find this out.

Once you start your car, the unit is defaulted at certain values. When you start your car, you must hit a button on the unit to wake it up. I generally switch between high and low real quick when I start my car.

I agree that your boost creep is not caused by your boost controller. This problem is inherent when trying to run an E3-16g at lower boost levels without proper porting.

 

[king_of_HTX]

Diablos911... I'm glad I just read your post . My car will have the specII on it when I get it back from being rebuilt and I probably wouldn't have known this if I hadn't read your post. Thanks

 

[bigal07]

So to port I have to take off the turbo and grind all the way around the hotside of the turbo. and on the o2 housing just on the big hole not the wastegate hole?

 

[dsmconvict]

...Port the wastegate hole. I just got done port matching my 7cm housing on my 14b, the mani, and the o2.

 

[bigal07]

Anything else that would work? or must the porting be done