Blake-73

Trying to decide which way to go. Which one would reduce sound the most. I am trying to lessen the noise a bit, plus pick up some performance. Anyone have experience with both setups?

Blake-73

LT1driver

The X pipe is best, but H pipe also works just not quite as efficient. :cheers:

AlwaysWave

look at my 2nd post in your H-pipe thread. :)

flynhi

X pipe will reduce exhaust sound more than h pipe. It will also raise the pitch an octave or two.

fireball

I scanned this drag / dyno comparison of different exhaust setups...
http://www.corvetteforum.net/c3/fireball/vette/

Here's the dyno summary:

Open headers: 429hp / 384tq
Dual exhaust: 412hp / 371tq
H - Pipe: 419hp / 378tq
X - Pipe: 428hp / 391tq

Blake-73

Thanks for the replys. I got this on me "to do list" now.

Blaek-73

tzavaleta

Will an X-pipe fit on a C3? Does anyone (maybe Flowmaster) make a pre-fabbed kit?

John Dirks

I am thinking of doing this mod also. Anyone else have experience with this?

marky mark

Dr Gas, I believe is the name. X pipe will fit C-3's. I have a 2&1/2" version located right behind crossmember on a '69. Previous comments on power & sound are similar to my results. I would recommend X pipe from Dr. Gas.

Regards, Mark :flag :chevy

CDaniel525

dr. gas.....anyone know of a website or phone number??
Chris

John Dirks

How much is the X pipe from Dr Gas? how difficult is the install? Could a decent muffler shop fabricate a similar product?

Alwyn678

Wow those are pretty good GAINS!! with the X Pipe

damac

Marky Mark,

I went to the Dr. Gas webpage and saw the x-pipes. It did not appear that they had a kit specifically for corvettes. Did you buy a corvette specific kit or did you just use their x-pipe and have some pipes bent for it?

Thanks,

Mike

flynhi

Made my own from two 45 degree mandrel bends. It took quite a while to determine the points of intersection and then to get it welded and smoothed inside. I don't think a muffler shop could make as well or as cheaply as Dr. Gas.

GROSSPOLLUTER60

I'm using a Dr Gas 3' to 2.5 X-pipe and a complete mandrel bent system through Flowmaster delta flows. I have n dyno #'s but It works REAL well with my engine setup.
For a short MPEG go to http://home.earthlink.net/~hjnsn and click on GP6T.

My buddies Mustang has a 347 with the same exhaust system as well and it runs REAL HARD :cool:

marky mark

The best idea is to buy just the X-pipe itself and have the other pipes fabricated by a good muffler shop. I bought a "kit" and wound up not using the supplied pipes (they weren't Corvette specific and did not fit exactly right).

Don't remember the web address, if you still haven't found it by now post here and I'll dig through my old receipts file for the ph. #.

No way you can get one built better at a muffler shop than their version. They've done the R & D and have got a sweet little product that works. They supply most of NASCAR with them. This is a cheap (relatively) power increase.

Regards,Mark :flag :chevy