Hmm..... I never thought to look at it like that.

It wouldn't solve the problem, but it may work as a bandaid fix. If you restrict the amount of air coming in (smaller filter, pre MAF) it won't fix the creeping, but it MAY limit the amount of air the engine is pulling in, limiting your max load, and helping with the fuel cut issue.

The best fix is to port the waste gate to eliminate the creep.

Your air filter has nothing to do with boost creep. Boost creep is usually caused by the waste gate hole being to small and not letting enough exhaust flow threw when the waste gate is opened. Since its not letting enough flow threw your turbo keeps spooling. Try reading the link kod provided if that doesn't help read threw this thread.

http://www.dsmtuners.com/forums/new...-boost-creep-creeping-t25-14b-16g-merged.html

^ Yup. Wrong side of the turbo altogether.

If you arent able to port, you may be able to control it by putting a silencer in your muffler as a temporary fix.

You should port your waste gate hole. That really helps with increased air flow. If you can't do it yourself a machine shop can do it for short money.

One thing overlooked a lot is the o2 sensor housing. A ported /ss o2 housing such as the punishment racing one can help a lot with boost creep. The increased flow of the area the air has to travel on the waste gate side is improved and can reduce creep a lot.

I had an Evo III 16g turbo set to 10psi with a full 3 inch exhaust without any creep whatsoever with the punishment racing housing. With both porting and the housing I would imagine you would not have a problem anymore.

If you choose to restrict the air flow coming into the engine, and doing it by putting on a restrictive air filter you will have some serious turbo shaft play in the near future and a ruined thrust bearing. (Or ball bearings if you have those in your turbo.)
This is due to the fact that the compressor wheel is beginning to see resistance towards the inlet and will try to pull that way under boost since it cannot keep up with the exhaust turbine.
(Very simplified explanation.)

Pull out your vaccum cleaner and start it, then slap your hand over the muzzle inlet and listen to the motor and observe the hose flexing. Your hand will now represent a restrictive air filter.


The smartest and easiest way to prevent boost creep is by porting as many already said. Or restrict the flow at the exhaust side.

Thank you for all the responses. I was going to port first before I tried this but after reading your responses I will not even try it. Thank you for your help!!!!!!!

If your not used to porting anything, you might want to practice and watch some video's on youtube. Also, take your time make sure its so smooth you cant feel any resistance to your fingure. Have fun!