m20 itb's?

[digger]

ITB's allow the engine to run better when using a bigger cam.

I wonder if those extrude a body ones are 45mm at the bellmouth or if its the bore of the throttles. Looks like they offer extension pieces to make the runner length tunable......mmm

Would be a good project to make your own GRP/CFRP plenum to allow the use of a single filter and allow CAI

As for extrude honing who says that the runners are not already oversized and there for making them bigger will be counter productive?

[nando]

ITB's allow the engine to run better when using a bigger cam.

I wonder if those extrude a body ones are 45mm at the bellmouth or if its the bore of the throttles. Looks like they offer extension pieces to make the runner length tunable......mmm

Would be a good project to make your own GRP/CFRP plenum to allow the use of a single filter and allow CAI

As for extrude honing who says that the runners are not already oversized and there for making them bigger will be counter productive?

well I don't know about you, but I'm pulling 5-10kpa of vacuum with the stock manifold/TB at WOT. the filter is only about 2-3kpa - I'd think an opened up manifold and TB would help me for sure (in fact I have one to put on, someday!).