Better Performance For An Rb20det

[chris r32 gtst]

Hi Everyone,

I have recently purchased an R32 with a standard RB20 in it. I am not happy with the power its producing.

Mods i have done so far:

3 inch turbo back exhaust

Pod Filter

Hybrid fmic

What would be the best modifications to get next... Boost Controller? new ECU?

From your experience what are the best ways to get more power out of an RB20?

Any advice will be appreciated!

[D-limo]

Firstly get a compression test done. No use mdifying an unhealthy engine... Then do a full service. Then buy a DR Drift boost controller for $35...

[paulr33]

a remap with a boost controller fitted will do wonders for how the car drives

[Ronin]

Wind the boost up to a bar, i ran my stock rb20 turbo for a year at 1 bar and it didnt die, even if it blows, they are cheap so who cares

[Cubes]

I personally wouldn't bother with a boost controller just yet.

Elongate the wastegate actuator holes and set it up on the dyno @ 1bar if you have an fmic or ~12psi without.

The idea is you reduce the wastegates travel, as a result increasing boost.

It works very very well.

A bleeder will tend to drop boost when trying to run 1bar, 12psi will be fine, the wastegate actuator mod won't. + its free.

If you find its running out of fuel, be prepared to fork out for a fuel pump.

I ran mine on 1bar for almost 4 years I believe it was.

Good oil with regular changes, heat range 6 sparky's and ensure afr's are good with no detonation will see the turbo living a long life.

Sometimes you luck out, life is such.

[Cool Hand Luke]

Winding the boost made a bit of a difference on mine when i had it, and i just used a t-piece.

The biggest differences i found, and was quite a big difference was an RB25 turbo @ 16psi and i got an ecu from dr drift. That was in a 180sx, but would have ran 12.7-8's for sure, and was more driveable and much better on fuel than before i got the chipped ecu. The turbo was no laggier, and revved cleanly till 8000rpm

[Cubes]

To run a 12.7-12.8 in a GTST you really need around 235-240rwkwk with a good driver and good tyres.

S13 being lighter.. I have no idea.

You are right the RB25 turbo is awesome bang for buck mod.

[R31Nismoid]

Hi.

Please have a red of the sticky thread in this section

http://www.skylinesaustralia.com/forums/in...showtopic=45218

Thats a good thread to start you off.

Then these threads to give you an idea of what mods will get you:

http://www.skylinesaustralia.com/forums/in...showtopic=54854

http://www.skylinesaustralia.com/forums/in...8229&hl=260rwkw

[chris r32 gtst]

I personally wouldn't bother with a boost controller just yet.

Elongate the wastegate actuator holes and set it up on the dyno @ 1bar if you have an fmic or ~12psi without.

The idea is you reduce the wastegates travel, as a result increasing boost.

It works very very well.

A bleeder will tend to drop boost when trying to run 1bar, 12psi will be fine, the wastegate actuator mod won't. + its free.

If you find its running out of fuel, be prepared to fork out for a fuel pump.

I ran mine on 1bar for almost 4 years I believe it was.

Good oil with regular changes, heat range 6 sparky's and ensure afr's are good with no detonation will see the turbo living a long life.

Sometimes you luck out, life is such.

Thanks for the advice, how do you elongate the wastegate actuator holes can this be a DIY or do you need to go to a performance workshop?? If so, any recomendations?? Im really considering getting an RB25 Turbo - where is the best place to buy RB25 Turbo's from? (im in sydney). I have moeny to play around with but not be f#cked around with

[D-limo]

Buy a DR Drift boost controller.. Boost will come on earlier and gives you the option of changing boost level much easier...

Modifying the actuator is an oldschool mod for when boost controllers were too expensive.

Edited March 8, 2006 by Drift_Limo

[Cubes]

Drift_Limo,

I run the 'dr_drift' boost controller, it drops boost from 14 down to 11 running the vg30 turbo.

The manual boost controller to bring boost on a 'little' quicker then the actuator mod to reduce travel to prevent boost dropping.

Just the boost controller alone won't prevent the rb20's usual boost drop.

Chris,

Pop the bonnet and have a look at the actuator.

The actuator bolts on to the turbo with 2 bolts, when you remove the actuator you simply elongate the holes to the right.

The wastegate mod essentially does EXACTLY the same thing as buying an aftermarket adjustable actuator for ~$120.

The aftermarket actuator uses a bolt on the actuator arm to adjust it in or out.