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Rb20 Map Running A Rb25 Motor

rnbguy

By rnbguy,
in Engines & Forced Induction

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Gambit Rookie

Gambit

Posted
Posted

They share the same airflow meter but the rb25det runs 380cc injectors and the rb20det runs 260cc injectors.

I'm sure a similar question has come up before on www.skyline-owners-club.com and the general consensus is that it won't work without remapping the ecu to suit the 25 due to having different fuel, ignition, nvcs requirements.

clip14 Rising Star

clip14

Posted
Posted

you would atleast have to run the rb20det injectors. if any sensors are different between the two engines you may run into trouble there as well.

nvcs shouldn't be a problem, it just wont activate.

im running a r34 rb25de using a r32 rb25de ecu. nvcs (vct) is not active, but the car runs fine.

W0rp3D Grand Master

W0rp3D

Posted
Posted

From what i can see your going to run into problems with the injectors, on my car i run about 220rwkw and that max's out my injectors, with the rb20 injectors being around 30% smaller that would mean that they would max out at around 150rwkw which is pretty much standard power for an rb25det, you mentioned mods, well you have no headroom for mods with those injectors.

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