First off let me say that this is for a 1971 El Camino.
What are the differences between a x-pipe and h-pipe? What would be better for a dual exhaust setup? Also which would be better dual 2.5" or 3" on a 350 with a cam that is in the 2800-6200 RPM range, single plane intake, and dart iron eagle heads w/ roller rockers and a 750 carb.
Thanks for the information.

 

No question about it, the "X" pipe is the better of the two. But may cause more clearance problems under the car such as shifter linkage, etc.

An "H" pipe can be run right under the crossmember, so clearance is usually easier.

The main purpose of a crossover pipe (aka balance tube) is to increase scavenging from one bank of cylinders the other. But you also want it flow well. Hence the reason the "X" pipe works better.

The names are based on the shape of the setup. An "X" pipe looks like an "X" when looking at the exhaust from the ground. The "H" pipe looks like an "H". Make sense?

Thinking of it now that you know that, you can easily see why the "X" pipe would flow better.

AJ

Oh yea, the two 2.5" pipes would be plenty. 3" wouldn't hurt, but may not be needed. Just MHO.

 

thanks anybody else have any opinions?

 

According to a magazine test awhile back the X pipe flows almost as well as open headers and actually beats open headers in the 1/4 mile by a tiny amount because of better low end torque, an H pipe is only a little better than no cross over pipe at all.

 

ttt

 

The X pipe. Which looks more restrictive for exhaust flow, an X, or an H?!

 

I always thought an H-pipe outflows an X-pipe because it doesnt force gases to cross each other.

 

Nice car huh? Oh well this will prove the point.

 

I have a mag that shows the difference and the X-pipe is the way to go
I will get it though and type it up in the next few days