I have had somebody offer to fit an H pipe on my nearly new set up. I am wondering if it would be worth it.
Ditto, but I too, vote for the "X" pipe route, or what I did on my 89 Ranger: built an "equalizer" chamber pipe. This is a foot long 4" pipe that the two exhuast pipes run into, then exit back to duals between the collectors and mufflers.chepsk8 said:Better scavenging, exhaust pulse balance, and a quieter tone.
BobV said:Actaully, the dyno chart you posted above is from the cat-convertor equipped X & H pipes. It's not apples-to-apples, as the two pipes used different convertors.
What you really want to look at is the "off-road" (non-cat) X & H pipe dyno test], which clearly show the X's better numbers.
that's with cats, on the ones without cats, the X killed the Hjerry S said:Well, I just did some internet research and my preliminary conclusion is that between the X and the H, the H is the better way to go. First, I found a tech note from Flowmaster's FAQ. Have a look
Do I need to install an "H" pipe to my dual exhaust?
Flowmaster strongly recommends using an "H" pipe, commonly known as a "balance tube" on all "true dual" exhaust systems. An "H" pipe equalizes the pressures between both banks of the engine giving a broader and flatter torque curve throughout the rpm range. It also eliminates "back-rap" common on deceleration, and creates a deeper mellower tone both inside and outside of the vehicle.
Is an "X" pipe better than and "H" pipe?
Over the years, Flowmaster's testing of all types of crossovers, including "X pipes", has revealed no substantial benefits over a properly installed "H" pipe on street driven applications. However, in race applications with small cubic inch engines and /or restricted (small bore) carburetors, will respond well to the addition of X pipes, tri-y styled collectors and/or properly designed single exhaust systems.
Then, I found an article from Mustang 50Monthly in which an X and an H were tested side by side. The H came out on top.
http://www.mustang50magazine.com/techarticles/4376/index.html
Finally,, the H is easier to install on my current set up. Just cut and weld. More work would be involved to get the X to fit.
THX 138 said:that's with cats, on the ones without cats, the X killed the H