Open Dump tube or not?
#1
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Join Date: May 2007
Location: Austin, TX
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Should I run an open dump tube or have it recirculated back into the exhaust? I haven't heard a miata with an open dump tube, but I think it would be much too loud for street use. Would adding a resonator of some sort help much? I have no fabrication or welding skills, so I will be taking it somewhere to have the work done. What should I do?
#3
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I plan to have the dump tube parallel the 3" exhaust to about the middle of the car, then dump back in. The further away from the turbo you dump it back in, the better. Here's the jist of it. The gases coming out of the turbo are hot and expanded. As they travel threw the exhaust, the cool down and slow down. Resistance in a pipe increases by the square of the velocity. Resistance in a pipe also decreases by 1/diameter^4. (has nothing to do with this discussion). Just tell whoever builds it to put the dump tube back into the 3" exhaust as late as far back as reasonably feasible.
#12
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Use one of these:
http://store.summitracing.com/partde...5&autoview=sku
I plan to if I run a dump pipe at all.
http://store.summitracing.com/partde...5&autoview=sku
I plan to if I run a dump pipe at all.