Turbo Exhaust Set-up?

What is everyone with a turbo running for an exhaust system? Such as DP size, exhaust pipe size, mufflers, and where it dumps/exits? and how do you like it?

I have not turboed a V8 yet but with my V6 in my GN running low 9's in a 3600# car I used 3.5 DP and exhaust system. I don't remember the name of the muffler but it was also 3.5". It was a brand used by Super Comp class for NHRA. The system turned out just in front of the rear tire. I also had a test pipe in the system (where the cat would bolt in when needed) and the car ran as fast through the muffler as it did taking the exhaust off. Unlike N/A motors, turboed motors don't like back pressure.

Good Luck on your system

Unlike N/A motors, turboed motors don't like back pressure.


Are you saying NA motors run better with more backpressure?

Are you saying NA motors run better with more backpressure?

Goodness, not this argument again. . .

Back to the main subject, I have a 3" downpipe that goes about 3' from the turbo to get under the car. From there, it swage's up to 3.5" goes back, over the axle, through a 3.5" Hooker Aerochamber muffler, then a 3.5" tail pipe.

I know there must be more set-ups out there...

I run both my 3 inch downpipes into a 4" Mufflex catback system with a spintech muffler and dual 3" outlets. I like the sound, not overly loud. I've run a Borla on my last single setup, and it was real loud (full open). I've also run a 3 inch to a 3.5 to a 4" Muffler dumping before the rear axel with a turndown. That was just rediculously loud, and the state patrol ended up busting me and I had to take it off. All kinds of interior resonance and rattles with that system.

. . .a 4" Mufflex catback system with a spintech muffler . . .

You should really consider a different muffler. We removed a 4" spintech from my friends ~500 hp NA 3rd Gen and it went from consistent 117's to consistent 120's in the quarter.

I'll just install a cutout when I go racing. I sure like the new exhaust!

engineermike - You should really consider a different muffler. We removed a 4" spintech from my friends ~500 hp NA 3rd Gen and it went from consistent 117's to consistent 120's in the quarter.

What muffler did your friend replace it with? I wish Dynomax made a 4 inch Ultra Flow with similar offsets to the Flomaster I am using on my Mufflex setup. I believe Magnaflow has a muffler with similar dimensions, I might give that a try next year.



Nick

[B]What muffler did your friend replace it with?

He just removed the 4" Spintech and gained 3 mph. We've seen similar gains by removing a Flowmaster.

I wonder why the only maker of 3.5 and 4" exhausts only offers the crappiest 2 mufflers on the market. . . :think:

I've always had good luck with Hooker Aerochamber. My old 550 rwhp supercharged combo picked up only 5 rwhp by removing my 3" Aerochamber. With my current turbo, I'm running a 3.5" Mufflex exhaust with a 3.5" Aerochamber.