Thread: Exhaust question....

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Ok, we're talking about my '82 'maro. Ran out of room under the car for a decent sized exhaust system for the car so it's going to be a set of outsiders with fenderwell headers..... (I like my cars low, btw)

The engine is a steel crank 6" rod 383 with flat top pistons, heads will be aluminum (not bought yet). Cam will be a mechanical roller with rev kit--no cam specs yet, got to get the rest of the pieces lined up first... 750 4 barrell carb on a single plain intake. RPM will be about 7500 max.

Question is, the outsiders will be 3 1/2" tubes with a muffler inside them (or at least a reasonable facsimilie of a muffler). Wondering what size and length primary tubes to run, and whether a not I should make them a set of step headers??? Should it be 3 1/2" or 4" collectors, and how about a guess on the collector length, too???? I'm building the headers, so we're not stuck with something some manufacturer thinks should work....

Oh yeah, transmission is a 5 speed so no concerns on all that tranny and converter stuff.....I still like having 3 pedals....

Thanks for the help.

well the primary is going to be what it takes to get from point A the engine to point B the out side of the fender well so around 36 if you lucky on the collector s i would use 3 1/2 start the step at 12 or so to the next tube 7/8 to 2 .what happen to the bbc we run bbc to 8000 with out rev kits ?

Originally Posted by pat mccarthy

well the primary is going to be what it takes to get from point A the engine to point B the out side of the fender well so around 36 if you lucky on the collector s i would use 3 1/2 start the step at 12 or so to the next tube 7/8 to 2 .what happen to the bbc we run bbc to 8000 with out rev kits ?

I was given a complete short block 383, fresh and ready to go!!!!!!

Originally Posted by Dave Severson

I was given a complete short block 383, fresh and ready to go!!!!!!

boy you are lucky some one sure wants you to walk to the light . well sell it i have all the part s for a 556 dart big M billet cap block with new diamond pistons .crank .rods .you would have to use corn fuel in it or hi tests today is .the hell of a deal day she needs to go

Originally Posted by pat mccarthy

boy you are lucky some one sure wants you to walk to the light . well sell it i have all the part s for a 556 dart big M billet cap block with new diamond pistons .crank .rods .you would have to use corn fuel in it or hi tests today is .the hell of a deal day she needs to go

hmmmm. Well, I could always build another chebbie, i guess!!!!!

well billet steel cap big m 9.800 deck with arp main studs . diamond dome pistons 4.500 bore with total seal classic rings. H beam rods ARP bolts.4340 4.375 crank = 556 cid . king bearing s main and rods .dura-bond hp cam bearings short block at one hell of a deal . you can not buy the crank/ rods and the block for what i can sell it for

Originally Posted by pat mccarthy

well billet steel cap big m 9.800 deck with arp main studs . diamond dome pistons 4.500 bore with total seal classic rings. H beam rods ARP bolts.4340 4.375 crank = 556 cid . king bearing s main and rods .dura-bond hp cam bearings short block at one hell of a deal . you can not buy the crank/ rods and the block for what i can sell it for

Sounds like a killer setup Pat!!!! Dare I even ask what something like that would sell for???? Seems like the real chebbie guys would be all over it!!!!!!

".....I could always build another chebbie, i guess!!!!!......"

OK WHO ARE YOU and WHERE's DAVE??????????????????

Originally Posted by Mike P

".....I could always build another chebbie, i guess!!!!!......"

OK WHO ARE YOU and WHERE's DAVE??????????????????

hell paint it dark blue call it what you want

Originally Posted by pat mccarthy

hell paint it dark blue call it what you want

For all the stock chebbie stuff in that engine, guess you could call it whatever you want!!!!!!

Originally Posted by Dave Severson

For all the stock chebbie stuff in that engine, guess you could call it whatever you want!!!!!!

you got it.... that why my donovans are not chevys

Originally Posted by Dave Severson

Sounds like a killer setup Pat!!!! Dare I even ask what something like that would sell for???? Seems like the real chebbie guys would be all over it!!!!!!

well i did not want to sell this block was going to keep it for a back up for the chevy build a 556 blower engine i have pistons and bottom end parts to do it ..BUT . i can not eat it or pay bills with it sitting so she has to go . and i do not need anything bigger then the 548 blower engine thats in the chevy .it is to fast the way it is for a car thats not tub out .and i will never cut the trunk pan out .it to clean to cut