Hi there,

Going straight to the point, what is the difference between the stock N3F1, N3G2A and N3G2B ECUs?

My '99 RB MT is using an N3G2A, but I can't for the life of me figure out what a B or F1 does differently.

Any insight would be greatly appreciated.

 

Wouldn't be surprised the mikuni pump in the F1 version IV car runs a different strategy with the different injectors.

I'm sure the G2A and B ECUs could be swapped without any consequence in the 265hp version V cars.....and probably into the 280hp cars too, if that way inclined.

 

N3G1 is the 280ps ecu
N3G2 is 265ps ecu, (manual trans)
N3G3 is Automatic (255ps)

N3F1 is the 96-98 Manual
N3F2is the 96-98 Auto

 

They changed the ECU plug in the 96 cars and I think they revised it again in 99. If you have a 99 ECU, for example, you couldn't plug it in to a 93, the plugs are wildly different.

Also the original ECU was 8-bit, later ECU's were 16-bit. The later ones are faster.

It's not worth an engineering effort to retrofit a later ECU - changing wiring, etc. At that point get a PFC if you want simple plug and play, it's 16-bit and fully programmable.

Dale

 

you just need an adaptor harness, which makes it expensive, like $300, but the newer ECU's run so much better its amazing.