I like Tom's other idea. Setup a typical SBC with a 2" head pipe then attach a muffler with say 3' of 2" straight pipe, a typical over axle bend, then another foot of pipe. Measure the flow at cruising speed (2500-3000 rpm) and at high speed (say 5K). Test as many as possible, cheap and expensive, publish the results. To make it even better, send the manufacturers a letter and ask them to submit their products first! I wonder how many would be willing to put their product up for an equal comaprison to the competition? On May 17, 2005 Dave Crooks wrote: > >When one tests mufflers, can you be sure that > >the flow with hot, pulsing exhaust gas will be > >the same as a cool, steady flow of air? Or at > >least comparable from one muffler to another? > > No it isn't the same, but at least it gives > you a point of reference. The exact same > question could be asked of Cylinder head flow > testing (but rarely is!). The question is > even more relevant with headers. The whole > idea behind equal length tube headers is to > keep the pulses of each cylinder spread out, > and not allowing two to crowd into the same > pipe at the same time. Static flow testing > will never show this. It will also never show > the true difference between shorties and long > tube headers. And what's true of the exhaust > is equally true of the intake manifold ports. > > On the other hand, there is no black magic here. > Given some time and computer horsepower it can > all be simulated, although it's sometimes faster, > easier and cheaper to build it and measure! > > As always, YMMV! > Cheers, > > > Dave > > > > . ============================================================= Posted by wixList Archiver -- http://www.amxfiles.com/wixlist