Rb25 Turbo On Rb20 Question

[R TUNE]

Ok just put a 45v2 turbo (rb25 series 2) on to my r32 Rb20 and a 3" front and dump pipe.

Tuner is a idiot and had the boost set at 5psi but still made 2rwkws more than the rb20 turbo at 12psi.

When i got the dyno sheet the AFR starts at 13.5:1 and dumps to 11:1 at around 5500rpm.

the bottom end of the power graph is a bit lazy.

Just wondering apart from getting a new ecu and retuning it, is their any other way of richerning the AFR?

I also have the following.

RS*R 3" cat back

drift pod filter

turbo tech boost controller.

I do wont to run it at 12PSI

[GTScotT]

If its the stock ecu, it will richen up as you turn the boost up.

But the question is why do you want it richer? 13:1 when spooling sounds ok and 11:1 on full song is pretty good to be honest.

[JonnoHR31]

sounds like its too rich already. turn the boost up and do a power run to make sure its safe.

[bubba]

Have you put a new fuel pump in? the stocker will be getting quite old and lazy.

[GTScotT]

sounds like its too rich already. turn the boost up and do a power run to make sure its safe.

13:1 and 11:1 too rich? Are you sure?

You might be surprised when asking real tuners their opinion on 12:1 AFRs.

[JonnoHR31]

thousands of powerful turbo cars running around at 12:1 and leaner. how many of them melt down from it?