Open Headers = New Personal Best
10-12-2015, 07:08 AM
#1
Open Headers = New Personal Best I've always wanted to try open headers at the track but driving it there then dropping the cat back and y pipe at the track then putting it back to drive home was not worth it. So, I dropped the cat back at home loaded it on the trailer and hit the track. First run with y-pipe 10.87 DA was only 90 best one I've ever seen. I thought that sucks what a waist of time. So I made another run this time 10.85, still disappointed. Now I took the y-pipe off and ran a 10.84 a new best but still come on. Decided to hit it one more time and boom 10.78 @ 124 DA was 500ish. Now that's better. Since the car's getting faster all day I said one more time, 10.81 @124 DA climbed to 1200ish by this time. Best with full exhaust was 10.85 @123 vs. open headers 10.78 @124.
Last edited by Mystery Bird; 10-12-2015 at 08:43 AM.
10-12-2015, 10:04 AM
#5
You picked up ET and MPH dropping the exhaust time for a better exhaust system.
This is pretty common on y-pipe cars making good power.
If you get the right system on the car the difference will be minimal.
This is a guess since you didn't mention collector or cat back pipe diameter.
Like the other member mentioned maybe a set of collector extensions for some inexpensive power as an alternative to a custom system.
This is pretty common on y-pipe cars making good power.
If you get the right system on the car the difference will be minimal.
This is a guess since you didn't mention collector or cat back pipe diameter.
Like the other member mentioned maybe a set of collector extensions for some inexpensive power as an alternative to a custom system.
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10-17-2015, 11:15 AM
#16
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Nice job Mystery! I had similar results when I put a cutout in the Ipipe on my old setup. Get a measurement on your collector length and add enough pipe on the extension to make total collector length 20". cut an inch off the extension each pass until the car doesnt pick up anymore. The paint trick will get you in the ball park.
10-19-2015, 06:40 AM
#17
Nice job Mystery! I had similar results when I put a cutout in the Ipipe on my old setup. Get a measurement on your collector length and add enough pipe on the extension to make total collector length 20". cut an inch off the extension each pass until the car doesnt pick up anymore. The paint trick will get you in the ball park.
