Jim Z wrote:Brian,
Are you running the 225/45-17 BFG or B'stone? I've seen some chatter on Miata boards about people considering going to a shorter tire due to the extended 2nd gear redline. Have you considered this option?
Brian wrote:Experiments never end. Outside of Chuck and Nathan most will not understand how massive the coverage is with this helmholtz, but it's pretty massive coverage! Peak coverage goes off the scale, reaches 60db. Working with the particular metrics of a supercharged ND and Header NDs, which is the highest challenge in trying to do a clean straight through (most competitors don't bother, they just make restrictive choices with seriously twisted internal layouts that take away some of the peak hp they would otherwise get with header and/or supercharger). Supercharger with header is the hardest sound control challenge, blows harder on entire system and testing finds the peak drone is not focused merely in the usual 120-130 range but shifts higher and has two peaks to hit. This is the largest Helmholtz we have ever tried on an ND, not sure anything goes to production with this but testing will continue! Result is volume is not near as controlled as our SuperQ quiet 'header' version muffler, this is much more aggressive, but sound is seriously exotic in the run to redline, seriously fun.
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