H-PIPE EXHAUST OR X-PIPE ??

[snotrocket71]

judging by your set up i'd say you could get away with just straight pipes no crossover. it'll be louder especially with either the 40 or 44. the h or x should help dampen the noise and if youre hellbent on running either of them just run the h pipe, its cheaper and easier than an x pipe. anythings better than a stock exhaust at this point its just a matter of taste.

 

[shotgun]

Both an H and an X balance exhaust pulses and give the exhaust another flow path(less restriction).

They will drop the exhaust sound a couple decibels and smooth it out.

They also will give a small hp/torque gain (5 to 10 hp/ 5 to 10 # tq @ the rear wheels).

The difference is the H becomes ineffective very low in the rpm range , gas/exhaust does not like to make 90 degree turns.

By contrast an X will provide these gains throughout the rpm range and tapers off right after peak rpm.

FYI , this info is from observed dyno testing (ie swapped out the h and installed an x).

 

[pontiacgp]

if anyone has any dyno tests showing any increase with an X or an H I'd luv to see them

 

[maddog20_20]

Great reading - no Dyno test, but actual 1/4 mile and 60 ft comparison, which means more to me than actual HP

http://www.boyleworks.com/ta400/psp/exhaust.html

copied from one section of the article
Crossover Test Results:

By reviewing the data in figures 8-10 (below), it can be seen that when comparing the H and X types, the X crossover not only reduced 60 foot times and quarter mile times but increased trap speed as well. Functionally, the difference between the X and the H is, the X type forces the exhaust to cross between both sides. Based on the performance increases we noted with the X crossover, the scavenging forces created by the gasses crossing over in this way appear to be stronger and more effective across a wider range of engine speeds.

 

[T-TOP TONY]

i have the x-pipe and i love it

 

[Bumpin1ohmSS]

I have an "X" with cutouts. I was running headers out to some Thrush weldeds before the x. Sounded mean and clean. But after adding the X, I wont go back to straight pipe out to the mufflers. The X smoothed out the exhaust tone nicely..





Flipped the piping around so the exhaust would flow right out the opening when the cutout kit opens....













The H pipe does make the exhaust note a lil deeper sounding to me. Take a look at some vids on youtube. Be sure to note what kind of motor the car has and mods done. That plays a role in how the mufflers will sound also. I looked for Thrush welded on a SBC 350. Worked out sweet. I found a setup very simular to my motor and loved the sound clip. Mine sounds just like the vid upload. Hope this helps bruh..
Elco Warren 8)

 

[SScamino]

Pat, I'm sorry, but I do not trust your information anymore, besides by dis-proved I meant significant gains that 84regalsbc23 said, sorry for the confusion as I re-read my post it doesn't make since, so let me re-type. As far as significant? No... are there gains? yes but for the cost of the pipe/labor/welding, to me at least it just isn't worth it for power you won't feel at all and if you do it's very minimal.. it's all in the sound you want to make!!!

 

[patmckinneyracing]

And why do you not trust my information anymore SScamino? This goes to everyone on the forum who doesn't trust my advice. What I say and give advice on is from personal experience and years of research. I simply post what I know on the subject and leave it at that. It's up to you to interprate it the way you want.

But do us all a favor and keep your interpretations to yourself.

 

[laman1982]

thanks for all the suggestion big big help thanks everyone ...!

 

[patmckinneyracing]

Good luck laman. Sorry for the added bump at the end.