Quote:
Originally Posted by Mountain
I can't recall for certain, but as far as I know, none of the Camaros at the SCCA TT Nationals last year had an issue with sound. I'm not sure how much that helps you, but maybe gives you some context.
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I did.
I blew 105db in my Callaway SC630 with gutted primaries, stock secondaries, crush pipe/AFM valve delete and stock NPP. I had to close the valves about half way and hold them in place with self tapping screws. I planned for this beforehand and had the valve actuators removed and drilled holes in the rotating part that lined up with slots on the brackets so I could add the self tappers at the track. I'd do this ahead of time or be prepared to lug it out of 3 and stay all the way to the right to avoid the booth on the outside.
1 Lap 1LE did as well with long tubes into NPP. I think he dropped his muffler and added NCMs baffles they sell you into the muffler inlet pipes.
Edit: the white heads/cam SS blew sound too. I showed him what i did and he pretty much did the same thing, but because he didn't drill the holes before he went he just ran the self tapper through the side of the pipe right next to the valve flapper itself to hold it in place.