DP77Vette

I'm running 2 1/2 chambered exhaust and installing Dynomax headers real soon. Should I run a H-Pipe or not? What's the advantages or disadvantages?

Thanks!!!

:cheers:

tnt76vette

It will take the snap, crackle, and pop out of your chambered pipes......You have to decide if thats what you want. Sometimes I wish I wouldnt have done it. On the + side, I think I picked up a few ponies by adding the "H".

tippi58

I say go for the H pipe, it takes that harsh rattle out of the exhaust noise and I think gives a more throaty rumble. :auto:

Mine sounds great. :thumbs: :flag:


:cool: :cool: :cool:

Chris O'

:yesnod: :yesnod: :yesnod: :cool:

1969Vette383

I'm about to undergo this same upgrade. Depending upon your exhaust you may want to try it without the H pipe at first.
I'm going to install my exhaust in sections that can be removed. I think what I'll do is make a section that is as long as the H pipe itself, that way I can unclamp it and change to one or the other style in the time it takes to jack the (cold) car up, undo some exhaust clamps, pull pipes and install the other set.
I hear X pipes are pretty common and have different sound characteristics entirely.

Alwyn678

I would recommend it for sure ...I have it on my 2.5's with 40's and it sounds AWESOME

tersian

I have an H pipe on mine and what it does is help equalize the pressures across both pipes, thus eliminating the popping noise. It's a more mellow sounding exhaust and IMHO sounds more like power instead of noise.

tshort

I also researched this and the opinion at the time was that an x-pipe is better. You might consider that. I'm going to get an x-pipe put in but I'm debating putting in some exhaust cutouts so I can run open if I want at the track.....or to shut up the little ricers. :rofl:

dath

Definitely cutouts:D I want to put some of those electric automatic cutouts in when I finally get to the exhaust stage of my engine swap. I'd just put in removable caps or something if it weren't for the same desire to shutup the ricers:D

1969Vette383

With my car down :( I was just talking about this with my friend as he gave me a lift home from work one day. I said, "What if I could run a pretty quiet, tame exhaust that even a little kid couldn't complain about? And then run one of those cutouts where you can pull a cable from inside the cabin and have this monsterous, throaty beast coming out of your engine?"
I bet the ricer's tach would go from revving at about 6 grand to sticking its tail between its legs and the tach needle curling and hiding. :lolg:

GTR1999

I have 2.5" chambered pipes and headers. I have a 2" H pipe just past the collectors and in front of the Muncie. It works well and the car runs better then it did with just the chambered pipes.
Gary

bloodvette80

I will never know... can't really H-pipe a set of side pipes. Man that would look stupid, you could call it a stump pan for those times you hit the ditch when the doghnutts go wonky.

vettfixr

I have an H-pipe on mine with 2 1/2 inch pipes. The mufflers are Dynomax Ultraflows and have a nice tone at idle and cruise. When you step in it they open up nice and have a very strong sound. I think the h-pipe contributes to keeping it quieter and makes it a much more livable system. Here's a pic.
PS
Forgot to mention that I have Dynomax ceramacoat headers.



[Modified by vettfixr, 7:44 AM 7/17/2003]

SuprJames

I think I'm going to try for an x-pipe when I redo my exhaust in a couple months. X-pipe and a couple electric exhaust cutouts. Not sure how it will affect sound, but I'm almost certain that's the most performance oriented setup.

no_radio

I ran my '74 with Hooker Super Comps and 2-1/2" chambered pipes for a few months without an H-pipe. It sounded loud, but sounded too much like glass-packs for my taste, and my friends gave me a hard time about it. So I had an H-pipe installed for $30 at the local shop, really helped. It reduced interior resonance and noise, reduced the popping sound, and mellowed out the tone. It is still a very unique sound, but not obnoxious.
Same with my Suburban (454, DynoMax headers and Super Turbo mufflers). The shop forgot to put the h-pipe in and I got home before I realized it. I really didn't like all the interior resonance and it was too loud at idle and in low RPMs, so I took it back. What a difference...nice quiet idle, very little resonance, but when you get on the loud pedal it really screams.
Both The Corvette and Suburban seemed to pick up low-end torque with the H-pipe as well.
In short...go with the h-pipe.
Jeff

DP77Vette

:hurray: Thanks for all of the responses. I'll be doing the H pipe!!!


:cheers:

munday

I have full length hedman headers, and 2 chamber 50 series flows with NO hpipe. I think the hpipe would give me a few more ponies, but I love it when i let of the throttle real fast and my exhaust sounds like an AK-47. hehehe
To make up for the ponies I just dropped in a stroker. :crazy:

1969Vette383

The way I understand it, an H-Pipe (or any crossover pipe) helps with the low end power. But yes, I do like the exhaust pops you most often get when each bank of cylinders has its own pipe :thumbs: