If your system was Hooker 2210's, then true dual 2.5inch all the way to the mufflers - do you have to have a H or an X pipe?

What would the pro's and con's to putting one into the system and of not doing so?

Any help or information is much appreciated.

 

I've searched and haven't quite found as detailed an answer as I would like.

https://www.thirdgen.org/techbb2/sho...highlight=pipe
"h-pipes or x-pipes are always a good idea. they help the flow and scavenging effects of the exhaust system, helping to increase torque and they also quiet the exhaust down a little. all in all, very worthwhile to have. if you have the tools and know-how to add one, i would definetly do it. i have one my true dual setup."

Heres a quote from another website:-
http://www.pontiacstreetperformance..../exhaust2.html
"A crossover, which is an interconnection between both sides of a dual exhaust system somewhere in front of the mufflers, has been used by automotive manufacturers to reduce sound levels and increase performance. A crossover lets the constantly changing pressure in both pipes equalize by letting each half of a V-type engine simultaneously use both sides of the dual system. In other words, the crossover helps minimize the negative effects of back pressure. Most crossovers look like an "H"; however, another type of crossover has been recently introduced that looks like an "X"."

https://www.thirdgen.org/techbb2/sho...ight=crossover
"It equalizes pressure of the pipes and helps in scavenging by giving exhaust pulses an alternate route to exit - thats why the X pipe is better than the H pipe - the exhaust flow can move quicker to the other pipe by not having to make a 90deg turn"

I'm sure I've heard some people say that they just like the sound better when there is an H pipe in the system.

However, surely it adds weight and can affect ground clearance. Is one really required in a high horsepower application?

 

Its a good idea, performance wise, but not neccessary.

IMO, dual setups usually sound better without an H or X-pipe. Thats also the only way to have "true duals"... no H/X-pipe.

 

IMO,
true duals don't have either a X or H pipe.

 

Personally, I wouldn't put true duals on my car unless it had an X in the system.

I have a Car Craft magazine from a ways back, probably around 2000. They had a '70 Cutlass with a built 455 in it that was running around mid 11's in the quarter. First they dynoed it with open headers, then true duals (no crossover), then duals with an X, and finally duals with an H.

The open headers made the most horsepower and torque. The X pipe system came in 2nd and was only 1hp shy and about 2lb ft shy of the open headers. And the X pipe system made more average power out of all of them.

That sold me

 

I love my x-pipe set up.

 

Yrs ago when I first got this car it had the 305/700r4 set-up. I had a shop install the heddman LT headers and exhasut system 2.5" true duals. They were supposed to install a H pipe but did'nt have time. I picked it up and I still could not get the rear tires to break loose-305 I know but I expected more with the new exhaust system. Next week took it back and had the H pipe installed, and honest to g-o-d it was day and night. Sound was alot mellower inside first thing I noticed, second thing was it felt like a new motor-literally. I could spin the rears easily at will. Sounds crazt and my buddies and me thought the same, but proof was in the pudding.


This new drivetrain I had intenetions of installing a H pipe, but did'nt. Ran all yr with just 3" true duals and it's noisey inside, but ran great. Pulled exhaust off and the car ran identical numbers ET and mph wise so no gain. I am planning to have the exhaust reengineered with the installation of a X pipe into the new set-up. Reason for me is after certain point at higher rpms it's basically bypassing the H pipe since velocity is so fast, but with an X pipe it merges together at one point forcing equalization. We'll see what I come up with for "real world" numbers report next season. I've learned to take magazine stuff with a grain of salt since alot of it does'nt really pertain to my usage.

 

You know, I'm a complete noob and have no idea how much room there is for these installations... But I'd say even an X-pipe must be restrictive. Wouldn't it be better to use kind of a dual H pipe system that looked like an X? It's hard to explain but I'm thinking about this:

The tubes run parallel. So you weld in a pipe from the left exhaust pipe tha goes in a steep angle to the right pipe making a little bend upwards. From the other pipe you do the same but downwards. So you basically get a dual H-pipe system that looks like an X when seen from above or below. For marketing reasons let's call it a 3D-dual-H-pipe .

 

I see what you are saying, but that would take so much fabrication, time and money to do that it hardly seems advantageous over just a simple X-pipe. Plus, your ground clearance would obviously suffer extremely bad.

 

abrication cost aside (this would have to be looked into) I think, too, that the ground clearance would be the biggest problem. Perhaps I'll find a way when I get the chance to crawl under the car

 

MUST you?

No.

 

Yes you must!!

 

What about fabbing up the whole thing, then taking it off, heating the x up with a torch and pounding it a bit to make it flatter? That should help ground cleanrance some...