I did, I provided the links, read the link of how it works.
Not on OUR engines.
You provided links to data for big-block Chevy engines, and the dyno curves themselves look highly suspect. The HP curves in particular.
As far as the link on how it works, that is more marketing than science, as are the dyno curves. That link is no more convincing and no more "scientific" than the graphs on FMF
's page, which show two totally different curves for "stock" for the same engine depending on which FMF pipe is being compared.
It's simple physics, and thats what they are trying to capitolize on.
It's not simple physics. Until a truly controlled test is run, it's merely junk science and marketing.
I'm not saying that it doesn't work, I'm saying that it doesn't work on our single cylinder engines for the reasons stated.
effect on the carb bowl and radiators is undeniable, and I'd be willing to bet real money that 100% of the gains seen on a dirt bike are from this effect.
IOTW: Run four dyno tests
1 - Stock
2 - Stock with an aluminum shield between the pipe and carb, head, and radiators
3 - Wrapped
4 - Wrapped with an aluminum shield between the pipe and carb, head, and radiators
I'd be willing to bet $100 that the results of tests 2, 3, and 4 will be nearly identical in that they will show comparable gains over #1.