Quote:
Originally Posted by MikeN.
I will try to take a photo of the HC and post it tomorrow. I appreciate your test with the vacuum gauge, but since the HC is very easy to remove or put back, I will try it at the drag strip instead. 
I have sort of used the gauge testing before, when I was trying to find a low restriction exhaust for my Raptor ATV. I used a low pressure tire gauge and shop vac . I found one from a CBR600 crotch rocket that flowed almost as good as an open pipe but was as quiet as the stock exhaust. |
The drag strip will work
, I once ran a late test and tune where I could run 3 passes back to back ( I mean as fast as I could get off the track and to the head of staging ) the truck although hot, ran within 5 thou on all 3 passes. That kind of scenario would be perfect for your HC filter test, in one pass, out the next, and no weather changes to worry about. Good Luck !