Dropping in a supercharged 383 with a large cam. Dual 3" exhaust. Ultraflow mufflers. I know crossover pipes can make more power, but I heard its only if your exhaust is restrictive. Is this true, or would I need one?

 

thats not true. An H-pipe equals out the pressures in the exhaust system. You know when its cold outside and you start up a dual exhaust car. the condensation kinda alternates from pipe to pipe when it comes out. An h pipe equalizes this so the exhaust comes out all at once. It sounds better too!

 

Well a summit kit is only like 30 bucks. If I did it, should the pipe be equal diameter to the exhaust? Or smaller?
Sound is always a great bonus.

Hey by the way, I used to be a Tactical Aircraft Maintenance Technician in the air force. We were called crew chiefs, I believe we called you guys sheetmetal. Is it the same in the Navy? I just got out two months ago. Civ life is a little boring compared to the last four years.

 

Yes we have metal benders, bubble chasers for hydraulics.

Might as well make it the same size as the exhaust, so if you decide to go with a bigger engine the h pipe isnt a constriction point.

 

run the h-pipe, it can't hurt anything only help, plus it smoothes out the exhaust note.

 

i've heard that an x-pipe works better.. but thats just what i heard... or read??


EDIT: its a tangentially siamesed x-pipe.. read the second and third article

http://www.drgas.com/articles/

 

Xpipes are more efficient and make more power than a Hpipe, most stick to a Hpipe due to mounting and space issues but an Xpipe will increase power in the upper RPM ranges more than an Hpipe not to mention drastically changing the exhaust tone... i lost alil power down low but 2500rpms and up it screams lol

originally i had a slightly modded 350tpi headman longtubes and 3" duals with turndowns with 3" afterburner mufflers and i loved it, when i went to lower the car i needed more ground clearance so i build a 3" mandrel bend system with 3" summit universal xpipe(100$) and 3" force mufflers and man wat a difference... the XPIPE made the exhaust soooo much better, id go with the xpipe just my .02

 

so an h pipe fits right in and the x pipe has some issues? what issues

 

I ran an H pipe in my car and it made an immediate difference. The car's a little smoother and quieter now but there was a definite power gain that beared out in my track times. The setup is Hedman long tubes, Hedman S bend extensions, H pipe is at the end of these extensions and I have a pair of dual classic chambered mufflers with turn downs.