lost some back pressure since i went catless, bought zzp midlength with catless dp off someone, has a res in the dp to reduce raspiness which didn't really do anything for me lol, have megan catback with a stock ss/tc muffler. friend of mine told me if i was to add a glasspack anywhere behind the dp and turn it backwards i'd gain a good bit of back pressure along with quietening it down a good bit, i was on 18 psi with shorty header and stock dp, now i barely pull out 16 psi, i'm on zzp s3 tune. (2.8 with 60#s)
any suggestions?

 

From what I've heard boost is a measure of restriction so your car actually has more power now

 

Does not feel like it at all.felt it pulled the hardest when it was @ 18 psi

 

thats probably in your head....


if you port your head, you top boost # will drop... because your flowing better.... back pressure isn't really needed when your in boost...

 

maybe you need to be retuned for the new setup

 

That's what im thinking. And dies anyone know if putting in a glasspack backwards make it quiet bc right now it's prettty loud can barely even hear my sc

 

Bump