Constructing your own Intake Manifold

[Travis R]

Try putting the TB parallel with the runners.

[infernosg]

Originally Posted by Travis R

Try putting the TB parallel with the runners.

My thoughts exactly. I've not been in the rotary world for a while, but has there been overwhelming success with a setup that has the TB and runner perpendicular? IMO, Mazda designed the system that way for a reason and you'd be better off coming up with something along those lines (TB parallel with runners), but with more volume, longer runners, smoother transitions, etc.

I'm toying with the idea of making a custom manifold for my ITB project, but obviously I won't have a lot of these same problems...

[vex]

Originally Posted by Travis R

Try putting the TB parallel with the runners.

Addressed below.

Originally Posted by infernosg

My thoughts exactly. I've not been in the rotary world for a while, but has there been overwhelming success with a setup that has the TB and runner perpendicular? IMO, Mazda designed the system that way for a reason and you'd be better off coming up with something along those lines (TB parallel with runners), but with more volume, longer runners, smoother transitions, etc.

I'm toying with the idea of making a custom manifold for my ITB project, but obviously I won't have a lot of these same problems...

Honestly if that's what I have to do, that's what I have to do. As it stands I'm trying to avoid doing it so I can have a much more compact set up. It would also eliminate the ninety degree bend that everyone has right in front of the throttle body (can we say pressure drop?). I'm still massaging it a little bit, and I'm confident that I'll be able to get it to flow right with the current thought/process (I have pretty much the entire summer to do it).

[WE3RX7]

Originally Posted by infernosg

My thoughts exactly. I've not been in the rotary world for a while, but has there been overwhelming success with a setup that has the TB and runner perpendicular?

13BMSP - aka Renesis.