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Rb20 Performance

sama1500

By sama1500,
in Engines & Forced Induction

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sama1500 Collaborator

sama1500

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Posted

hey im new here so dont really know much about this but i was wanting some help, currently got an r32 gtst, fairly standard with the only mods being front mount, pod filter, rb25 turbo and boost controller set at 12psi, dont know how much power its currently making but im wanting to chase more power in the future but nothing crazy, i'd like to keep the responsiveness of the current turbo but run more boost so im guessing i need a better turbo, injectors and a tune, any suggestions?

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R_34 Community Regular

R_34

Posted
Posted

Search button will help you. :whistling:

And begin with the rb20 dyno thread, there is a lot of useful info in it on what to do.

It depends of the country you live in. Some country are much more tolerant than others with modified cars.

Sinista32 Grand Master

Sinista32

Posted
Posted

Much more boost and you will blow your trubo (if it is stock)

Cost effective option for more KW's with same response

Cam gears, Highflow the Turbo you have, upgrade your injectors, have the ECU nistuned and tuned.

Maybe upgrade your fuel pump and a free'r flowing exhaust if it's stock.

The RB20 dyno thread will give you what people have modified to get the stated power figures and specifics of the upgrades.

R_34 Community Regular

R_34

Posted
Posted (edited)

Yep they're 444cc but low impedance. You'll also need the resistor box and wire it up.

I chose the deatschwerk injectors as these ones are drop-in.

They're perfectly fine for now albeit noisy.

Idles good at a steady 15 AFR and I have something like 70% duty max @20psi.

Mines were 458cc in average, ranging from 451 to 465cc if my memory serves me right.

If I ever convert to E85 I will pick the 650cc ones.

Highflowing a turbo means replacing compressor and turbine wheel with larger parts with new bush bearing on ball bearing converison. Check with hypergear or kinugawa turbo.

I ran the kinugawa one, but I wouldn't recommand it if you're chasing the responsiveness of a stock turbo. Hypergear should have smaller turbo more suited to your liking.

Edited by R_34
R_34 Community Regular

R_34

Posted
Posted

No need for a bigger turbo then, the 25 turbo if healthy can bring you there but no more. At least not safely in the long run.

If you keep the 25 turbo I woul install a FMIC as the 25 compressor wheel is not very efficient.

AFM will be big enough, oem injectors are a tad short to be safe I guess, CA18DET injectors (370cc) with a rb26 resistor will do the job easily, on pump gas at least.

I don't know about the clutch capability. Mine was blown when I got the engine so I upgraded it directly.

sama1500 Collaborator

sama1500

Posted
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Posted

i'll probably end up chasing more power in the future anyway and it is my daily so i'd rather not push the 25 turbo too far, so for now injectors, turbo and nistune should get me over 180rwkw, also the previous owner said there was already a heavy duty clutch in there so i should be ok there

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