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05-01-2002, 11:38 AM
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#1 |
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Registered User
 
Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,051
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exhaust question
Anyone try a H-pipe or x-pipe on your dual exhaust? Any gains in power or torque? I am thinking about it since it is supposed to equalize the pressure and gain power. Anyone try this yet?
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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05-01-2002, 11:59 AM
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#2 |
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yeller
Join Date: Oct 2001
Location: Twin Cities
Posts: 13,824
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I have not done mine...YET. I have heard nothing but good from this. I do know this, if you can get an "x" pipe do it, they are more efficient then an "h" pipe...smoother flow of exhaust gasses as opposed to the 90 degree bend of the "h" pipe.
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Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale |
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05-01-2002, 09:52 PM
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#3 |
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Registered User
Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,051
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I don't know if an x-pipe will fit in my truck though. I have a '74 K-20 and with the lift and the driveshaft being so close I think I might have to use an H. We'll see when I get around to it.
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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05-05-2002, 12:07 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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On the dyno, they ALMOST always show gains in h/p and torque. They will also reduce the noise slightly.
------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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05-06-2002, 12:16 AM
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#5 |
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I'm back with 2nd truck!
Join Date: Feb 2002
Location: Texas
Posts: 3,774
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I did a X pipe on mine and it did help in torque and horsepower. You can see how I ran mine here http://www.geocities.com/cjhicks1/exhaust.html
------------------ BRANDON 1979 CHEVROLET BONANZA BIG10 350 GM Crate Engine ZZ4,1406 Edelbrock, 1 5/8" Heddman Headers 2 1/2" Dual Exhaust with X pipe and Flowmaster 40 Series Mufflers,350 Turbo Transmission,3.07 Gears My website for the truck.
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1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson |
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