I have a custom 3 inch exhaust from the headers (with a x pipe)(dynamax super turbo's) all the way out the rear, I have a new set of powder coated factory z/28 tips that basically will run from the mufflers all the way out, but the tips are 2'1/4 if i go that route will going from such a large diameter down to one as small as that, will it harm anything or affect the scavaging effect? My egine is a 355, about 10:5 to 1 CR, some where around 400hp, i run at the track from time to time, but only for fun & recreation any advice for me?

I really dont think you will notice a difference. It may choke it down some but since it sounds like you are not trying to win the purse all the time, then you should be fine.

Steve

<font face="Arial,Verdana" size="2">Originally posted by Stak:
I have a custom 3 inch exhaust from the headers (with a x pipe)(dynamax super turbo's) all the way out the rear, I have a new set of powder coated factory z/28 tips that basically will run from the mufflers all the way out, but the tips are 2'1/4 if i go that route will going from such a large diameter down to one as small as that, will it harm anything or affect the scavaging effect? My egine is a 355, about 10:5 to 1 CR, some where around 400hp, i run at the track from time to time, but only for fun & recreation any advice for me?</font>

That will work fine but will you be OK with little pipes after having 3" tailpipes?
I have a 3" system on my 383 stroker. I got tired of setting off alarms, loud exhaust and watching out for the lawmen so I put a set of 2-1/2 Super turbos on (enlarged the in /outlets). I lost a little power at top end but the sound is perfect now. Lower tone and alot less alarms going off. Your smaller tips will work fine.

z28Mike, yeahh i will be fine with the small pipes, i want it quieter, the guys accused me of having a big block and accused me of being on the bottle lol, heck i had a stock bottom end/dished pistons, about 9:3 to 1 CR, and it ran really good, and i had a bad cam lobe, well anyway I just rebuilt my orginal block, flat topped it, line honed/zero decked, balanced & blue printed, the works, and im going for the stealth look, even grinded the names off my alumnim intake & water pump and painted them gm factory blue just like my block, ect.... anyway youget the idea, the super turbos, really made it alot quieter and i know the factory tips will tone it down even more, anyway thanks man, you told me more of what i really wanted to hear

Are Dynomax Super Turbos quieter than say Flowmaster 50's? I need new exhaust on my 77Z28. Thanks! Laurie

Laurie, I had flowmasters on my Z at first, im not sure which chambers they were, but it was cool at 1st, but after i went with a 3 inch exhaust,and then on Saturdays when i would go cruisin, after a few hours my ears & head would be ringing, but when I 1st put my Dynamax Super Turbos on, you could barely hear my car run, let alone know it had a 3 inch exhaust, but now, since the mufflers are broke in, it has a deeper tone to it, but incomparison it is much much quieter, and they flowwwww Good too!!!!!!!!!

Thanks Stak! I didn''t know that Dynomax Super Turbos come in 3 inch.I guess I'll go with 2.25 or 2.5 inch. Thanks again! L.P. http://www.nastyz28.com/ubb/smile.gif

God...I love the sound of my 3 inch duals with flowmaster glasspacks.