Intake manifold construction

[drewski86]

Originally Posted by vex

Multiple TB Plates. Is 4 Better than 2 better than 1?...

I don't think that any is better than the other as far as power goes. It would depend on what you have to work with. Each would have to be tuned for where the runner hits "atmosphere" whether it be a plenum, air box, or atmosphere.

I think I understand, but could you clarify just to be safe?

Which part?

Originally Posted by vex

Maybe this is a silly question, but I could have sworn there were aluminum flanges for creating your own manifolds that you could buy. I can't find any except for the REW. Anyone have any websites/locations to buy it from?

I would build off a stock S4 lower manifold as it already has good transitions to the shapes of the port runners. Depending on how big your ports are going to be, you can hone out the stock lower and it should flow plenty. The EP guys are making good power (rumors of 220+whp) with monster streetports on full S4 manifolds with only internal modifications.

[vex]

Originally Posted by drewski86

I would build off a stock S4 lower manifold as it already has good transitions to the shapes of the port runners. Depending on how big your ports are going to be, you can hone out the stock lower and it should flow plenty. The EP guys are making good power (rumors of 220+whp) with monster streetports on full S4 manifolds with only internal modifications.

Still looking for the mating flange though. I plan on keeping the stock LIM for the moment, but I'd like to re-do the Itermediate and Upper Intake manifolds so that means I'd need a flange to mate to the LIM, pipes to run to the plenum then to the TB.

I haven't been able to find the flange, even though I know I've seen them before. I just can't remember where.

[drewski86]

Originally Posted by vex

Still looking for the mating flange though. I plan on keeping the stock LIM for the moment, but I'd like to re-do the Itermediate and Upper Intake manifolds so that means I'd need a flange to mate to the LIM, pipes to run to the plenum then to the TB.

I haven't been able to find the flange, even though I know I've seen them before. I just can't remember where.

I see, for some reason I was thinking you were talking about manifold to engine flange. I don't think I've ever seen flange that you're looking for. If you don't have access to a mill, you could just cut the flange off the existing intermediate manifold and use that.