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Rb25det Fuel System Maxing + Losing Vvti

tarmac

By tarmac,
in Engines & Forced Induction

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tarmac Enthusiast

tarmac

Posted
Posted

anyone know what power the stock injectors max out around on a rb25det?.

and how valuble is the VVTi. ive gotta rb20 ecu i can use to tune it up, but not sure about losing it. i know its activated by oil pressure, but is there also a 12v or 5v input which switches it on kinda like the vtec, cause if thats the case then i can use a RPM switch to turn it on.

insu Rising Star

insu

Posted
Posted

Yeah they max out at 100% duty just like every other car...

Sorry, I had too.

I've heard around 180rwkw is pushing it? Might be able to get that or a higher more safely with increasing the pressure regulator?

The stock fuel pump would also be an issue too.

Best to get your car on the dyno as you're upgrading its power levels to watch your injectors and pump.

paulr33 Grand Master

paulr33

Posted
Posted

r33 gtst injectors will max around 250rwkw

they will be on their knee's at this power level

you can get a bit more out of them by upgading the fuel reg to bump the rail pressure up a little bit

vct on the r33 is based on rpm, on until 4700rpm then it switches off

with it off the car drives like a bucket of poo, much less response and zest

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