Topher306

I have a 347 stroker engine, the lower manifold is ported and polished, and I'm about to hot tank the upper to clean it out (both are the stock aluminum manifold, not GT-40 or any aftermarket,) I'm planning to replace the throttle body and egr plate, but don't know what size to do. I was thinking 75mm, and can get it port matched if needed, but would 75 big a problem in terms of performance or passing deq? And would it require port matching of the intake or would that just be an added benefit? Also alot of the aftermarket TBs and EGRs say they don't include TPS or IAC, are those parts that can just be used from the stock pieces, or can I live without them on the new ones? Unfortunatly I do have to DEQ it so I still need it to pass.

stanks347

I live in Ca and you know how messed up our smog is. You can go with an eddy as they are 50 state legal. I would get an intake though. The stock intake is crap. Your stroker motor will hate it. There are many companies that make 50 state legal parts.

luckythirteen13

no reason to get a tb if you have the stock intake.

Topher306

Well the stock tb and egr plate are pretty f-ed up so just needed to be replaced anyway, so I figured it would make sense to get a bigger one now since the intake will be replaced in the future, so in that case would a 75 still be ok for now?

nacanitihs

a 75 will be fine. def be on the lookout for a better intake asap. what heads are you running on the 347?

mjr46

personally I'd go bigger than a 75 on a 347, but of course I would also have a supporting intake and heads and cam, if your sig is correct, it looks as if you have a 347 making 302 power........??

Topher306

Would the GT-40 intake ( http://www.latemodelrestoration.com/...ntake-Manifold ) be sufficient for the stroker and work with the 75mm throttle body?

AdderMk2

are you serious here????

get a real intake... like a victor 5.0

Hamutoff

Go to the Junk Yard and pull off parts that are not pretty f-ed up and run it until you can do something proper.... :I