Straight Pipe?
- Thread starter C-flo
- Start date
would you be leaving the cats in? what about the resonator/muffler thing before the last muffler? as far as i know it goes: pre-cat > cat > resonator > muffler. what are you cutting off?
Yeah I know the resonator your talking about right after the cat, and upon looking at that I figured if I was going to cut off that far back I might as well replace all the pipe from the downpipe out, so now I'm thinking of just cutting off the last muffler to open things up a little bit but I don't want it to affect performance.
I have about as close to a straight pipe as it gets, 3" DP to 3" test pipe to 3.5" cat-back.
It's stupid loud. But with the Blitz, it sounds like sex, so I'm gonna keep it this way for a bit.
It's stupid loud. But with the Blitz, it sounds like sex, so I'm gonna keep it this way for a bit.
Hmmm. With all of that being said, I will be leaving it the way it is until I get the full exhaust then. What I'm aiming for is very very loud, but also a clean sound. A "Clean Loud" I suppose is what you could say. I know cutting the muffler off will probably only offer loud w/o the clean part, but I was hoping it might help with back pressure. Turbos love back pressure right?
C-flo;1407639 said:
Turbos work off of pressure ratio across the turbine. Ratio means a little here is a lot there.
A little bit of restriction in the exhaust will make a large difference in turbocharger operation. You can increase the output of your turbocharged engine a large amount by changing the stock exhaust to a more open exhaust.
The factory down pipe with cat and the turbo elbow are the largest restrictions in the factory system aside from the 2.5 inch piping.
Any restriction will cause a large decrease in efficiency of the turbocharger to turn exhaust into power. You want to fit as large/free flowing exhaust as possible to your car before hitting diminishing returns.
A full Three inch down pipe/exhaust is good for a good amount of power, start with that.
Just to add to this, mine is a 3" pipe all the way from the turbo back, with only a rear muffler. Nothing else. It's not unbearably loud, but I might put a resonator on there to lower in-cabin noise a bit (can get annoying on the highway) and while driving through town it does sound quite loud with the sound echoing off the buildings, but when on the open road or while idling it sounds just fine 
Well I have to disagree with a lot of people on this. I run a BIC DDP to 3.5" straight pipe on my car and really like it. I also have V band at the end to switch to a muffler and do switch back and forth on occasion. Most people really like the straight pipe sound and you can really hear the turbo through the exhaust.
Vids
http://www.youtube.com/watch?v=F747dexc_r8
but whatever, you can think its rice or gay it really doesn't matter. Its still quieter than most NA performance cars with an exhaust system when the wastegate is closed.
Vids
http://www.youtube.com/watch?v=F747dexc_r8
but whatever, you can think its rice or gay it really doesn't matter. Its still quieter than most NA performance cars with an exhaust system when the wastegate is closed.