Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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alright, im royally confused here, lets go from the top.
1. chevy makes a 400
2. pontiac makes a 400
what are the differances? which one should i build an engine with?
i here alot of people building 406's, is that a 400 bored .30 over?
somebody please clarify all the differant types of 400 combinations, thanks
Well, a 400 Chevy is a SBC...a Pontiac 400 is a.....Pontiac 400. Pontiac, Olds, etc... had their own type of block at one time. For instance, the Pontiac 350 is basically a long stroke big block, in Chevy terms.
ive already read that, but that still didnt tell me the differance between the pontian and the chevy block, it also didnt tell me which one i should use if im going to build a 400.
Like the other thread says, absolutely nothing interchanges between Pontiac and Chevy 400s except points, rotor, and spark plugs. I don't know how to be any plainer about it. The 2 kinds of motors have absolutely no other parts in common. They didn't even have the same color of paint.
These cars (82-92 Camaro & Firebird) never came with a Pontiac V8, only Chevrolet ones. Therefore, none of the parts you need to bolt a Pontiac motor into one, exist; the trans is different, and won't interchange between them; there's no exhaust system made; and no motor mounts. The battery for a Pontiac V8 is on the driver's side, for a Chevy V8 it's on the pass side. Of course, with enough time, money & ingenuity, you can put practically anything into anything; but if you're having to ask this type of question, you're probably not in the type of situation where it's the right thing for you to do.
Bottom line: if you want a 400, get a Chevy one. Don't bother with the Pontiac one.
Same thing goes for a Buick, Olds, Chrysler, or F*rd 400 (yes, they had them too); or a Buick, Pontiac, or Olds 350.
__________________ "So many Mustangs, so little time..."
