Dyno of Open headers, or straight pipes compared to X/H pipe?
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TECH Regular
Joined: Jun 2006
Posts: 440
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From: Alamo Heights, Texas
Dyno of Open headers, or straight pipes compared to X/H pipe? I have Longtubes with about 1 1/2-2 feet of piping welded on each one. I've already read all the threads about scavenging x/h pipes bringing more power than a straight pipe set up. I would like to see some numbers, or runs or something though.. anyone have any before and afters, or at least a dyno run with straight pipes?
I have Longtubes with about 1 1/2-2 feet of piping welded on each one. I've already read all the threads about scavenging x/h pipes bringing more power than a straight pipe set up. I would like to see some numbers, or runs or something though.. anyone have any before and afters, or at least a dyno run with straight pipes?
447rwhp through 3 inch H pipe w/ Borla XR-1 mufflers
408rwhp through open cutouts off the headers
Thats kind of odd. I had cut outs welded on to the header collectors my T/A that I had and dropped .1 and gained 1 mph by opening them at the track.
Teching In
Joined: Mar 2009
Posts: 25
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From: middleville,mi.
the rest of the setup could effect which way is faster? took the camaro to track with open only (not enough time to run closed)so i have not seen back to back results myself but was told by friend that his is faster through mufflers.
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I pick up between .15 and .2 and 1.5-2 mph with mine open...but we mostly bracket race so they are more for making street cars **** themselves in fear and on faster cars the sound of me leaving has led to several redlighting
I am thinking of going to a dual 3" setup with a H or X in the future, but I don't have evidence of it gaining me more than 15hp right now and it would be somewhat costly and much more of a pain than other mods I could do first (pulley, heads)
Also make transmission and driveshaft related tasks much more of a pain...
I am thinking of going to a dual 3" setup with a H or X in the future, but I don't have evidence of it gaining me more than 15hp right now and it would be somewhat costly and much more of a pain than other mods I could do first (pulley, heads)
Also make transmission and driveshaft related tasks much more of a pain...
I had dual cutouts right off the headers on my old car, heads/cam 347ci...picked up 21 rwhp on back to back dyno runs with the cutouts open over my slp loudmouth exhaust. Car had pacesetter long tubes and ORY and an original loudmouth.
