chevy350

Is it really necessary to go through the cost and trouble of a H-pipe on a true dual exhaust setup? How many horses does not having one actually cost?

Mark A Shields

It's worth it. Maybe check into an X pipe I think they may be better.

Momar

www.drgas.com

kfoley

Depends how much power you're putting out. The more you are the more an h-pipe (or preferably x-pipe) will help. If you do go that route, get the x-pipe, they flow just a little less than open headers. Do a search and somebody posted an article on it a while back.

No4NJunk

here's a pic of mine. I could tell a little difference in power. Most of all I love the sound it produces.

SSC

Its total BS!!!!!!!!!
Why waste your time making a restriction in a dual exhaust setup, it defeats the pourpose! The ONLY reason someone might need an H pipe is if the exhaust pipes are not equal meaning one is more than an inch or two longer than the other. The only reason you would need an X pipe is if you decided to go GUNG HO and use pipe thats too large and you need some sort of restriction. Too many people read too many mags and dont understand the pourpose of the part thier buying. I was one of them, now I know better.

No4NJunk

And guess what genius!!!! One is longer than the other!

SSC

Yes and that why an H pipe helps in a situation like yours. Now if the pipes were close to equal length BEFORE THE MUFFLERS the H pipe would not benifit you power wise at all. If you design an exhaust system properly no extra BS is needed.

No4NJunk

sorry but we're not all as good as you.

Momar

I dont believe that to be true. In a motor each cylinder fires at different times of course. Well at some point you have more pressure on one side than the other just as a result from the natural firing order. This allows the exhaust to equalize pressure and take the path of least resistance. This is how I understand it so if you have some magic formula to prove me wrong lets hear it. There have been tests done with dual 2.5 and x pipes that flowed very close to as well as open headers, but without the crosspipe you lose a fair amount of power.

Ben

ME Leigh

I'd like to know how an x-pipe with greater pipe area is a restriction?

mypurple92rs

hay No4NJunk how much did that setup run you i would like to do custom system over the winter.thanks

No4NJunk

$250. included all the piping, h-pipe, and flows. Had it done at a local muffler shop. very professional work.

rx7speed

read up on exhuast scavaging.


with the different firing rates of the cyl it will help create a low pressure zone behind your exhuast pulse and in turn help pull the next one out thereby helping reduce pumping losses and creating more space in your cyl to help pull more air/fuel in....


works even if you have unequal headers or pipe sizes.....

do you think nascar just throws them in there for ****s and giggles????


and also if you are talking about putting pipe sizes in there to large then putting a restriction in there to help things out.... sorry to say but that just showed me how ignorant you really are as far as exhaust tuning......

restriction is bad evil no good no matter how you look at it

Momar

You get him!!! lol

mypurple92rs

WOW was that a disconnet price or there normal prices i was figuring $600-$800 just for the pipes and x pipe

JMatlock88

Wow, that's kind of a kick in the nuts considering I just paid over $300 for a mufflex ypipe.

No4NJunk

lol. man you got ripped!

No discount pricing. I think they just liked my car . That included all the labor. They even stuck some nice collector gaskets in for me!

No4NJunk

heres another pic. Since this pic I've had the turndowns cut off. It sounds so much better!!!

mypurple92rs

NICE

88IROC350TPI

Ok, I'm going to be very blunt here: You have absolutely no idea what you are talking about.

Why do a lot of cars from the factory come with H pipes?

"The typical exhaust design is a pair of exhaust pipes leading to a pair of high performance mufflers. One addition ahead of the mufflers that has been proven to improve both power and reduce noise is an H-pipe. The H-pipe is nothing more than an additional pipe placed between the two lead-down exhaust pipes. The H-pipe tends to increase volume in the exhaust system ahead of the mufflers. Our testing has shown that a large diameter H-pipe tends to increase torque at or below peak torque while not detracting from top end horsepower. you can look at the H-pipe as increasing the length of the header collector, which has a similar effect on power. Additionally, by connecting the two seperate exhaust pipes, the H-pipe also dampens noise. Placement and design of the H-pipe is not very critical, as long as the pipe is placed between the header collectors and the mufflers. Recent testing of H-pipes also suggests that a larger H-pipe seem to benefit torque. If you place flanges on both sides of the H-pipe, it also makes easier to intall and remove, which reduced the hassle when it comes time to pull the transmission."
-John Lingenfelter



"The definiution of a balance pipe is a pipe connecting the collectors of one bank of cylinders with the bank opposite. Balance pipes have two possible attributes: increased power and reduced noise. My experience dyno testing both these factors has shown that a balance pipe has proven 100 percent successful at reducing noise. The reductions amount to a minimum of 1 decible (dB) to a maximum of 3 dB, with 2 being common. This is a worthwhile sound reduction especially as it could make the difference between passing and not passing tech. As for power increased, these prove less certain than the noise reduction. In about 60 perfect of the cases I've tried, the engine responded by delivering up to about 12 horsepower more with 5 to 8 being about the norm. In the remaining 40 percent the power was unchanged. Although 40 different small blocks ranging from hot street to race, I have never seen a reduction in power. This means that use of a balance pipe is worthwhile as it always reduces noise and more often than not increases power. There's no down side.
The dimensions of the balance pipe aren't overly critical. The only dimension that appears to have a measurable influence is the pipe diameter. This requires an area at least equal to that of a 2.25-inch diameter pipe with 2.5 to 2.75 being preferable. Above 2.75 inches diameter I haven't seen any further gains, but I've only conducted tests on engines up to a littler under 600 horsepower. As for the length of the balance pipe, this appears to be immaterial. Dyno tests indicate balance pipes lengths as short as 18 inches responded in virtually the same manner as ones 72 inches long." - David Vizard from his book "Small Blocks On A Budget"

Yes, I did just write that entire thing out. I have too much time on my hands (or maybe type really fast....)

AJ_92RS

I was gonna write that . You beat me to it... DORK!!!

And to Mr. rx7postwhore... or whatever it is you're calling yourself now ...... why do you have to say this?...... "Ignorant" is a strong word. How about using "unknkowledgable"? It's much less harsh, means basically the same thing, and is SOOO less likely to start a flame war.

I know you're a reasonable guy based of previous posts, so I know you'll take this FWIW.

Now go to your room!!!!!! :sillylol: J/K

AJ

rx7speed

da<x>mn you

I never said I like to use the nice terms just the blunt ones

but ok

so maybe your word would be a better choice though for the situation since I hate flame wars... can be fun but we have enough fo them on the boards as it is anymore



and I was already in my room once today don't think I want to go back