Unfortunately, we have etesting up here[sm=smiley21.gif]. Had to replace my gutted hi flow last spring so it would pass. Slowed the truck down by .2 when it was na. Probably cost even more with the blower on it now.

 

at my corvette forum, a guy has a blown Z06 (C5), and he lost some 50hp with the cat...

 

I am not at all surprised the Vette lost that much. Hi flow cat over stock intially gave .3 off ets, when it self gutted itself 2yrs later I got another .18. Takes serious hp to knock .5 off ets with a 4000lb vehicle (na @ time).

So what kind of #s does a blown C5 run?

 

I'm with you on that one. I didn't even dare to drive the 2-3 miles to the exhaust shop to have my TTi 3" mandrel bent exhaust put on after I put the Dynomax ceramic coated headers on. It was insanely loud with open headers and I didn't want a ticket, but I did take it out on the road for about a minute or so that way just to see how much of an improvement it was over the stock exhaust. I didn't want to put the rest of the exhaust on after that, but I did want to be able to drive it without getting tickets left and right.

 

these are his timeslip entries....he also has a newer porsche...good guy, and Very knowledgable..

2002 ZO6, C5R 427/D1SC supercharger, M6, 3.42 rear end, 345 drag radials - 10.2@142 mph
1998 Camaro w. 408 and 150 jetted NOS, M6 3.73 rear end, 315 drag radials - 9.9@140 mph





mitch, you live in ohio, and you have less laws then we do..dont you? when we ran at tristate last year, i drove the mirada with open headers and QTPs 25 miles from the track to get dinner...i believe the town was hamilton ohio

 

Not that I'm aware of. I've heard of ones with far less noise getting tickets for it. It is very possible that it is more based on where in Ohio you are and I'm in Columbus, so I know it would be a nice big ticket. I was at one car show with my SRT-4 and there was a cop overseeing things and I asked him about the legalities of my car since they come from the factory without a muffler and he had never heard about them. It does have a resonator and it does count as a muffler to them, so that works. I don't know how loud your Mirada is, but I know my Roadrunner on straight headers could be easily heard for quite some distance, it is really loud yet not quite as loud as my Dad's Cuda with the 630+ horsepower 426 Hemi was on just headers.

 

Avanti does. He set a land-speed record. And he has a PhD in mechanics or physics...he races at the salt flats. Check out his gallery!

 

what?

 

ANYBODY WANTZ 2 RACE A SILVERADO SS?

 

i would be more than happy to....