steelman1091

Hey everyone, need some help please, heres what I have, 2008 GT,Steeda CAI,Steeda Throttle body Spacer,Flowmaster American thunders,Bassani Off Road X Pipe, Car is tuned with SCT to 93 Street. I recently had the x pipe, mufflers put on. I did a new tune on the vehicle. Car sounds to Raspy at high RPMS and my throttle response is not as good as it used to be. Could this be a tuner issue??? Any suggestions will be greatly appreciated..

Steelman

Shadow7874

the raspy part is probably the x pipe, the lag may be the tune

Lupo222

steelman, check out my "FRPP Hot Rod Cams...WOW" thread and tell me if by rasp you mean the sound it makes when I let off the throttle. I hate that sound too and plan on ditching my O/R XPipe for an OR Hpipe ASAP

gman73

O/R X and flows are notorious for producing a raspy sound.

ronniegibson1978

my or/h was raspy too with bassani's...i hated it..but i went in and welded magnaflow magnapacks before the axle's and using them as a resonators...and now there's is completely no rasp. plus i got a loud sounding car with a very deep tone...purrrrfect!!!

sas281gt

Definitely the lack of cats. I don't know why people skip the cats these days. With good high flow cats you only lose about 3 hp. Sheep just follow.

gman73

Actually with hi flows I gained about 3 hp and 6-7LBS of tq over o/r. Here are some results from the same dyno but on different days. Temp was pretty close to the same. SAE corrected.
Stock Catted H
297RWHP/308 RWTQ
O/R Prochamber
302RWHP 305 RWTQ. I could feel a little loss of tq down low
Prochamber w/hi-flow cats
305RWHP/312RWTQ