i have a S4 turbo that im gonna put in a SP S4 engine and a friend of mine ported the exhaust side of the turbo and ported the wastegate as big as the flapper and im planning to put a 3"exhaust in my car with presilencer and my question is that if im gonna have boost creep or not been that the turbo is modified? thanks

 

So what are you going to do if everybody thinks that you are going to have boost creep? I'm not sure that I understand the point of this thread.

 

The s5 turbo is the one with the problem waste gate, the s4 will do 10 psi easy with out porting the wg. How much boost are you trying to run?

 

You're gonna have problems.

Check my mods in sig. I still have stock turbo, and I saw 14.2 psi near the end of second on a chilly night last night.

I need to do something about that fast.

 

ya its got to be ported, with a full exhaust ull be seeing on cold days easily about 10, i cracked a rear side seal cause of it.

 

nobody will know till you try.....

you will have some. (anything over 5psi is boost creep) but it might not be enough to cause problems. (under 10psi or so)

if you have the stock intake you should be fine. if you have a TID and filter you might go over 10.

 

actiually i dont have stock intake and BOV, i have aNPR intercooler, a 3 inch pipe from the turbo to the AFM with a K&N filter and i have a tyfoon BOV. i dont care if it does 10 psi, but like i had a few time with my old engine and non ported turbo and 2.5 inch single exhaust that i seen 11 even 12 psi. being SP and the turbo been ported i hope it doesnt cause a big boost creep

Wompa164: thanks i saw your post about it too. im planning to put a haltech soon in my rx