How many of you run an open header?
I was thinking if i needed to spend $$ money for exhaust system on a car that I don't plan on running on the street. Performance wise, what is the better option?
If it is stricktly for the track, then you may loose a bit of bottom end, but the top end will do better. I've run both ways at the track before. I dropped 2 tenths off my times by running open headers. To me, it's not worth the added hearing loss. Just my .02
I dont think I need a full exhaust though, maybe an h pipe into glass packs?
I read in hot rod mag a few years back that running open headers actually may hurt your horsepower slightly and that running a crossover pipe into duels works better. H pipe and no glasspacks would probably work too.
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I only know what my own experience was. Here is what I did:
Long tubes
After the long tubes, I put on 2 1/2" collectors, to an H-pipe. Immediatly after the H-pipe, I had cutouts. After the cut outs, I had full 2 1/2" exhaust mandrel bent to the rear. I suspect that my torque didn't suffer as much because I had it necked down to a 2 1/2" collector and then the H-pipe right before the cutouts.
You're best off talking to your engine builder, or a performance shop person though and tell them what your specific combination is, as this plays a HUGE part of whether or not you will be hurting your performance.
Most tracks require some sort of mufflers. Unless its on 44's and has a whip antenna stay away from glasspacks.
Big tires and open headers arent impressive.... RTCTTFMFERS
Big tires and open headers arent impressive.... RTCTTFMFERS
Last edited by GNs-r-slow; Aug 20, 2009 at 10:45 AM.
Some circle track guys run a "Bullit" muffler. Has small baffles on the inside but its practically straight pipe, My brother use's them because Desoto SS chacks shit like that, Its a good way to beat the system if you have to run a muffler.
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TurboRAM Member #5
24psi & Stable
GET SOME 





It's very much loud... I have a 1,000 watt sound system in my car, and I'm having to crank it just to hear it out the exhaust.