Open hedders vs. Bullets right off the collector... any ET results?
04-03-2009, 01:56 PM
#1
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Open hedders vs. Bullets right off the collector... any ET results? Does anyone have results on how their car ran with open hedders vs. Dynomax Bullet mufflers? I would be running the Bullets right off the collector without a head pipe.
04-03-2009, 05:29 PM
#2
I would just run my car open headers all the time, but I do drive it on the street once in a while, and sold my Y pipe and catback, so I'm just going to run it with a bullet off each header to hopefully quiet it down some. I drove my car with open headers, and open cutout, and don't have any ET's to compare, but it didn't feel any different.
04-03-2009, 10:00 PM
#6
With a pair of bullets vs nothing, I doubt that there's any performance difference at all. There's not even much of a weight difference to have any impact.
I've run my car with open headers, and a 3.5 inch in/out dual exhaust with a pair of 44 series mufflers, exhaust is about 50 lbs of pipe, and removing the weight is the only thing I have seen other then the car being a TON louder.
Exhaust on it's quiet, off it's loud as hell and honestly, I've gone as fast with it on as I have with it off.
Good flowing muffler and enough pipe diameter so there's no backpressure buildup, and you shouldn't see much of a change.
I've run my car with open headers, and a 3.5 inch in/out dual exhaust with a pair of 44 series mufflers, exhaust is about 50 lbs of pipe, and removing the weight is the only thing I have seen other then the car being a TON louder.
Exhaust on it's quiet, off it's loud as hell and honestly, I've gone as fast with it on as I have with it off.
Good flowing muffler and enough pipe diameter so there's no backpressure buildup, and you shouldn't see much of a change.
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04-04-2009, 04:29 PM
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I gained nothing in the 1/4 mile with the headers open vs. my 3" H pipe through Borla XR-1s.
I lost 30rwhp/15rwtq on a mustang dyno going through open headers vs. through my Borla XR-1s. I suggested a few friends to put a true dual setup on over open headers and all of them gained around a tenth in the 1/4 with the dual exhaust setup.
I lost 30rwhp/15rwtq on a mustang dyno going through open headers vs. through my Borla XR-1s. I suggested a few friends to put a true dual setup on over open headers and all of them gained around a tenth in the 1/4 with the dual exhaust setup.
