Hello
I have read about putting rb25 turbos onto rb20's. One thing I cannot find a clear answer to is if the engine needs to be tuned to run it.
Is it ok to run a rb25 turbo on a r32 gts-t rb20 engine without a tune for a couple of months?
My mods I have are full turbo back 3inch exhaust with a sports cat and split turbo pipe, pod, and the return flow fmic.
I am going to put in a new aftermarket fuel pump such as a Walbro or Tomei.
The rb25 turbo that I have has the HKS actuator on it.
I live in Japan so not so hot as it is in Australia.
Will I be ok running the rb25 turbo on this set up?