Rb25 Turbo On Stock Rb20

[dooby87]

got a stock RB to go in my 180 and also have a stock rb25 turbo. Can i just bolt it on and boost away. Or am i going to need to get a tune, custom ecu, remapped ecu???

Also, what sort of power gain am i going to get with a RB25 turbo and 3inch exhaust, and what is an RB20's stock power output at the wheels anyway??????....... thanks

[MANWHORE]

yep, but tune is always better though

[dooby87]

will i still get better peformance, it wont mess up my fuel economy, or anything else for that matter???

[lach 32]

hey, check this link out....shows a detailed guide to installing a rb25 turbo onto a rb20.....should answer any questions that you may have.

http://www.skylinesaustralia.com/forums/in...showtopic=90401

[Green_s13]

it wont muck up fuel economy, and you will notice an increase in power but you wont get the full benefit untill it is tuned, to give you an idea my car was making 135rwkw at 10psi with the rb25 turbo then tuned it and at the same boost i made 150rwkw and then 180 with 13psi, it is a good cheap upgrade for the rb20

[dooby87]

thanks, guess i will be getting a tune pretty much straight away then, was considering up grading my ecu at the same time, most likly to a link systems one.

Is this a good idea for early mods?? is it going to give me much more power?? cheers

[MANWHORE]

It is definitely a great mod. The rb20 should have came out with the rb25 turbo.

It gives a fair bit more power, fair bit more torque, without much extra lag. Not to mention they're newer and in better condition.

Just to give you a rough idea, the rb25 turbo supposedly flows about 25% more than the rb20 turbo (that's what sydneykid says)

[Mooney]

I'm interested in doing the same thing.

[FordyR31]

Its deffinately worth the upgrade. As stated the gains r there on 10psi, use the actuator from ur stock turbo and the 25 turbo otherwise u'll run about 6psi. I have the older RB20DET ECCS in an HR31 and with pod, 3 inch exhaust and 33 turbo I was making 130rwkw also, with the SAFC tuned and a Bosch 040 pump to be safe it went up to 152rwkw. Save ur cash and get ur RB20 ecu remapped.

Liam