Thread: Exhaust cross-over question

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I am wondering what everyone's opinion is on a cross-over pipe on the exhaust. I got into a lengthy discussion with a vendor on whether the cross-over pipe was necessary or not. I have built many cars and have different feelings about the necessity of the cross-over, or X pipe.
I can see it equalizing the exhaust pressure and would agree with that. However, it minimalizes the sound of the exhaust, or should I say the sound of the cam. The way I see it, the cross-over pipe would make the exhaust sound more even and possibly more mellow (for a lack of a better term).
It seems that it kind of defeats the purpose of "Dual exhaust". I have never dyno'd one to see if it makes a difference on power or not. I want to hear about what some of the Guru,s think.

Ed

I don't like loud exhaust by any means, but I do like to hear a lttle of the cam. It seems to me that the "H" pipe would even out the exhaust, but also mellow out the effects of the cam as far as sound.
I am having a difficult time finding a good place to place an "H" pipe in this system because of the routing.
Thanks for the input.
Ed

You can attenuate the low frequency sounds from an exhaust system by installing an H-Pipe.

The noise level remains about the same, but you won't set off as many car alarms as you used to.

If you're after attenuation only, you can install the H-Pipe anywhere you want as long as it's in front of the mufflers.

I posted a photo of the H-Pipe setup on my 32 - go here: http://www.clubhotrod.com/forums/sho...715#post144715

Using the next size down exhaust tubing - IE: 2 1/4" H-Pipe to a 2 1/2" system - makes for an easier install than using the same size tubing.

I have an H-pipe system on my Van. I love it. The sound from the pipes became more mellow, and distinct. I noticed a slightly better toque response, and a better idle.
I put my crossover directly under and just ahead of my universal on the transmission. I also put my mufflers and cats directly below the manifold outlet, and ran the pipes back from there. I was able to use a smaller body muffler, with larger inlet and outlets.
It is a simple set up and I like the results I got.

My '73 Z-28 had an H exhaust from the factory even. Replacing any factory pipes over time I've kept it the same and never felt wanting for a different exhaust sound, but that's just me.

i have a x cross in my gto it is a 4 inch exhaust and sounds geat all lot of people think its sounds very different .i have had the H cross but the X pipe is the way to go