Raising Boost On Rb20det With R34 Turbo

[r32matt]

Hi,

I have a R32 with a RB20DET and I want to raise the boost.

Im buying a boost controller and I was wondering how high could i raise the boost? I was hoping that I could raise the boost a bit without buying more parts.

Will I need a bigger fuel pump and other parts or can i just raise the boost??

Any Help would be Great!

It has:

R34 Turbo (running 7psi, stock boost)

3 inch excust system

Front Mount Intercooler

K&N Air Filter

Lighten Flywheel

Thanks!

Matt

[rory_kieran]

Dear Matt,

Firstly, look up Cubez on the members search. He is a expert on the R32. I would suggest the R33 High Flow as it makes a huge difference and to get a electronic boost controller as it holds boost much longer. You can just wind it up yourself and the good thing is these turbo's are cheap at $600 so it is a good risk. Just dont go over the 12 pound mark. But truth being, a dyno tune would really hit the spot and make it all worthwhile.

You definitely need a fuel pump before that. I got a Walbro on mine and picked it up for only about $200. It worked wonders and is alot cheaper than a Bosch 0.40. PM me if you want more info

[WazR32GTSt]

in answer to your questions in a simplified form...

will i need a fuel pump? yes

how high can i raise the boost (safely)? 12-14psi is ok with that turbo on an rb20

what other parts will i need? a boost controller. the fact that you already have full exhaust / FMIC is great and this is the enxt logical step of modification

good luck,

Warren.

[r32matt]

Thanks!

I was also wondering will the new fuel pump affect the way my car runs? Will my car still run smooth even if the boost is low?

The Turbo I have on it is from a R34, how much boost could that hold?

[Mulkers]

Use the R32 turbo's actuator.

[Interloper]

Use the R32 turbo's actuator.

I'll second that idea

[Cool Hand Luke]

I ran 16psi on mine constantly without a fault, but i could have been lucky...

From memory (which is far from faultless), you should be able to get 200+rwkw from the stock injectors. Even if it was within your fuel pump's limits, i'd get a new one cos the extra stress on the probably 10+yr old pump might end its life prematurely.

The 2 best mods i made on mine were the S2 RB25 turbo, and possibly the best, a chipped ecu afterwards. Its a pretty good street combo after.. Nice power, and hardly any, if any more lag than stock. Good luck!

[Abo Bob]

Changing fuels pumps doesn't affect anything except it's ability to give more fuel up high with more boost.

That said I put a walbro in once and the pressure increased dramatically at low revs making it run too rich. A second hand GTR pump fixed that and is a good cheap upgrade for you too.

[r32matt]

Thanks for the info!

I ordered my boost controller yesterday so it should arrive in a few days. I just gotta find a new fuel pump and boost gauge. I was thinking of getting the Bosch 040 fuel pump or a R32 GTR fuel pump. Does it matter if the R32 GTR fuel pumps are 17 years old?

Dragged a R33 last night and owned it

[Munna1]

Thanks for the info!

I ordered my boost controller yesterday so it should arrive in a few days. I just gotta find a new fuel pump and boost gauge. I was thinking of getting the Bosch 040 fuel pump or a R32 GTR fuel pump. Does it matter if the R32 GTR fuel pumps are 17 years old?

Dragged a R33 last night and owned it

Bosch pump will be harder to fit than the GTR pump but one would expect it to be more reliable than an old GTR pump. With the level of mods you have you would benifort greatly from an ECU tune this will iron out any problems the new pump may cause.

cheers

[DFAULT]

'Cool Hand Luke'

wow do you really run 16 psi all the time on s2 turbo?

thats pretty cool

[illusiVe]

R34 turbos. 10 psi for track, 12 psi for abit of daily sprint occasionally, 13 psi for drags and if u dont care if it blows.

[WazR32GTSt]

remember an rb25 running 14psi flows more air than an rb20 at 14psi

...so don't confuse the reliability of a turbo on an rb25 to that when its on an rb20...

on an rb20, the rb25 turbo is good for approximately up to 14-15psi

Warren

[jazza08]

17psi will go hard But makes ur turbo crap itself... lol

Id leave it at 1bar if your someone who wants occasional drags and doesn't drive the car hard all day everyday. If you are abit like that try 12psi as the turbo will last longer.