Exhaust Manifold

[R TUNE]

Ive had a look but couldn't find what i was after.

first question is what can the stock RB20DET exhasut manifold support (KW) before it comes a restriction.

2nd in the set up below would i be better of with a aftermarket exhasut manifold. i wish to keep it low mount.

set up:

RB20DET

ADJ cam gears

Return flow FMIC

3" split dump pipe

3" front pipe

3" high flow cat

3" catback exhasut

Rb25DET turbo @ 12psi.

nistune ecu.

bosh 040 fuel pump

any sugestions to the set is also welcome

Edited February 16, 2011 by R TUNE

[R31Nismoid]

Manifold is a waste of money with that turbo in all honesty.

if you want more, its bigger turbo but be aware on a 20, that's noticeable lag increase.

even then depending on choice of turbo stock manifold is fine.

[JonnoHR31]

~280rwkw is the limit of the standard manifold. give or take 20-30kw.

standard 25 turbo is a much bigger restriction than the manifold

[R TUNE]

standard 25 turbo is a much bigger restriction than the manifold

Can you elaberate please

[R31Nismoid]

As in the turbo is the problem not the manifold