Rb20 Question

[Lock_to_lock]

Hey Guys. Im new here.

Iv just put a series 2 RB20 in my r31. At the moment i have no intercooler, 3in dump pipe to cat, and standard 2in cat back. Now i know that this set up is terrible but it is only like this so i could get it running. Anthoo long story short. The car feels like it was making really good power for this set up, installed a boost guage and discovered its running just over 10psi.

I didnt think that 10psi was standard boost for a 20. Does anyone have an idea to why is would be running this much boost?

Any help is appreciated.

Cheers, Josh

[catchmydriftr32]

my rb20 ran stock at 7psi until the dump pipe and exhaust gave more free flow, resulting in higher boost. with intercooler fitted should run 10 - 11psi. this is the norm. i found it strange at first also

[R33Matt]

Hey Mate,

RB20's run on a stock boost of 10psi

The dump pipe will increase the boost, which is why your running just over 10psi. Should be safe to about 12psi.

You might wanna get a intercooler though, lol

[TTT]

rb20 stock wastegate actuator spring pressure is 10psi.

no boost controller required.

it's 10 psi.

since you got no intercooler in the works, it will make a little bit more.

[abu]

Yep standard boost is 10psi, may go up a little with a turbo back exhaust.

I have an RB20 with APEXi pod filter, BLITZ return flow cooler and stock everything else except fuel pump and I was running 12psi with no boost controller.

Now I have a cat-back exhaust on, with a shitty cat and it makes just a little under 0.9bar (13psi) with no boost controller, but not much gain from the cat back.

Edited November 12, 2007 by abu

[Lock_to_lock]

Thanks heaps guys!

Yeah exhaust and cooler are coming very soon. Just got to save a few more pennies.