Creeping like crazy...

[firebirdvert305]

Well guys...im on stock 14b...i got a turbo xs manual boost controller set to 15psi..i got a walbro 190...but i stock daily drive it on 15psi....race it usually 19psi...depends on if im on pump or 110...Well anywayz heres my story...bout a week ago i had my muffler removed (had a restricted muffler on it) It held boost fine when i had the muffler on. Since then i got the muffler removed and just put a straight pipe on, from there on its been creeping. My exhaust setup is a punishment racing 02 housing 2.5", to a mandrel 2.5 burshur downpipe to 3" after the flex piece w/o cat. What it does now is ....it will spike 19psi...come back to 15psi...but as i get up in the rpms..it will eventually go upto 19-20psi if im WOT. Do you think its my wastegate flapper is two small considering the amount of boost im running? I plan on going to an evo 3 16g in the near future...should i look into the 34mm WG flapper? Lemme know what you guys think? I find it odd soon as i removed the muffler..it started to creep badly...but before when i had the muffler on, it didnt creep at all

 

[CanadianTSi]

The less restriction in the exhaust the more likely you are to creep...

If you want to run high boost 20+ then the bigger flapper isn't always a good idea.

Port the area leading to the wastegate to allow the exhaust gases to flow out the wastegate easier.

 

[firebirdvert305]

Canadiantsi...do u have aim or aol...i c u on alot of the forums that im suscribed too. Seem to be very knowledgeable...post a s/n or whatnot...talk to you soon.