Low Boost, Catback questions - Page 3

Boostmaniac · 04-19-2008, 04:41 PM

Ok, I have been in the rotary game for a long time, but I have 2 questions I have never really seen asked before.

This is the one that you all are allowed to flame me on. I have an S4 TII that is getting ready to be road worthy again. Something was bothering me though about the turbo. I see absolutely no boost until 4k RPMs. This was in dead stock trim with a ghetto cat back install. I haven't verified this yet, but I assume the twin scroll is still completely functioning. At what RPM do you guys start to see boost in your S4 TII's? (I am swapping the turbo out for an S5 turbo and manifold in very good condition to see if this fixes any of my issues.)

Second, I have an 80mm Corksport DP and MP I just installed (to see if cat clogging was the culprit to my boost woes.) and I was wondering if the RB Rev TII Y pipe and Rev TII dual exhausts would bolt up to my configuration. I love the sound of the RB units and was curious if I could save money by just having them bolt up to my current configuration instead of also having to buy the RB DP and MP also.

Any info would be awesome guys and gals. Thanks again.

-Maniac

04-19-2008, 04:41 PM	#1
Boostmaniac Rotary Fanatic Join Date: Apr 2008 Posts: 182 Rep Power: 0	Low Boost, Catback questions Ok, I have been in the rotary game for a long time, but I have 2 questions I have never really seen asked before. This is the one that you all are allowed to flame me on. I have an S4 TII that is getting ready to be road worthy again. Something was bothering me though about the turbo. I see absolutely no boost until 4k RPMs. This was in dead stock trim with a ghetto cat back install. I haven't verified this yet, but I assume the twin scroll is still completely functioning. At what RPM do you guys start to see boost in your S4 TII's? (I am swapping the turbo out for an S5 turbo and manifold in very good condition to see if this fixes any of my issues.) Second, I have an 80mm Corksport DP and MP I just installed (to see if cat clogging was the culprit to my boost woes.) and I was wondering if the RB Rev TII Y pipe and Rev TII dual exhausts would bolt up to my configuration. I love the sound of the RB units and was curious if I could save money by just having them bolt up to my current configuration instead of also having to buy the RB DP and MP also. Any info would be awesome guys and gals. Thanks again. -Maniac