Anyone ever tested the sound level of your Cobra?

[750hp]

Dan, huh.... what??? Did you say something.... Oh, mufflers? Yeah, I've got 'em. I'm using perforated 3.5" tube inside the sidepipes, with 5" outside stainless pipe. The packing inside is the really fine white fiberglass packing that the big rig truck muffler shops use. I have a horrible feeling that my first day at the roadrace track destroyed most of the muffler packing. It was quieter before that day. The foot-long flames shooting from the sidepipes on deceleration might have had something to do with that...

Jack - did you fit a spiral style insert into your pipes? What brand? Did this drop the idle noise, or WOT noise, or both? Any effect on power? What compression ratio are you running in your motor? More compression seems to really increase the sound. Sorry to hear about the Fling. Your car was one car that I slapped myself for not seeing at last year's event. I'd read about it previously, and was disappointed to see that we were both there, and didn't meet up. Next year?

Ant, noisier when you back off? When I see a Police car, I can't help but back off..... Did you still have perforated muffler running the length of the sidepipes, and then fit the Supertrapps to the ends, or only use the Supertrapps?

Thanks,
Craig