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What Injectors + Afm To Get For My Rb25?

islade

By islade,
in Engines & Forced Induction

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islade Rising Star

islade

Posted
Posted (edited)

Hey guys,

I just got my car dyno tuned by Gavin Woods, he's an absolute champion.

Car is currently putting out 315hp at 0.9 bar.

Specs are:

1993 RB25DET

Apexi PowerFC

Bosch 040 Pump, Tomei Fuel Reg, Stock Injectors

KKR560 Turbo, front mount, stock AFM, Greddy Profec B Spec II

He said he could only run 0.9 bar of boost as the AFM was maxxed out, and injectors were at 92% and he doesn't like going above 90%

So... I'm gonna save up for injectors and an afm, and had a few questions....

1) What injectors and AFM would you recommend? I'm not planning on eventually running any crazy power, just wanting to fix whatever's "holding back" the engine :D

2) how much boost would you run on a stock engine? (140,000km) The turbo seems as though it would be happy to run 20psi+ but i'm guessing the engine wouldn't last

3) Are there any other bits I would need or should get? EG: will new afm need an adapter for the existing pod filter or wiring in a new loom, or any other bits that should be changed at the same time?

4) Where should i get these bits from?

Thanks guys :P

Isaac

Edited by islade
Stealthynsa Proficient

Stealthynsa

Posted
Posted (edited)

i pretty much have the perfect information on injectors atm in my post just below yours :D

and the afm is covered heaps here already, get a z32 afm.

and for how much boost, lol thats covered alot to..

ive learnt to use the search bar since my first post otherwise u look like a complete tool.

Edited by Stealthynsa
R31Nismoid Grand Master

R31Nismoid

Posted
Posted

1. Z32, Nismo 555's

2. Who knows, more about the tune than anything.

3/4. Nengun, greenline, any of the forum traders as well. AFM will be larger, might need a new adapter.

Nasty turbo though the 560 :D

Also, once you put in larger injectors, put the factory fuel reg back on, you do not need the Tomei one.

islade Rising Star

islade

Posted
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Posted

Thanks for the advice guys,

I have read either 440cc or 480cc for S15 injectors, guess I gotta do more research :banana:

What's the reason for returning to stock FPR if i get bigger injectors? I realise I may not need the additional pressure, but can't it just be turned back down?

Isaac

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