rb25 turbo onto rb20 motor

[matress]

hey guys,

is this an easy swap over? what sort of power gains can be expected from it? does the rb25 manifold bolt up to the rb20 head or is a custom manifold needed?

cheers,

mat

[mr_rbman]

everyones going to tell u to do a search mate, been covered a million times but cause i was once new too i'll tell u that yes it is a straight swap!

[BHDave]

Aslong as you have a late model r32. Otherwise get yourself some late model water lines.

And thats it.

[matress]

thanks guys! the search button told me all i needed to know!

[B0oStEr]

Aslong as you have a late model r32. Otherwise get yourself some late model water lines.

And thats it.

Would water lines from an rb25 fit and where do they connect?

[Wazz]

imm i have early model rb20.. all lines fitted up (how ever i f00ked one taking it off so had to replace that anyway ) but yer bolts straight up bit laggier how ever use the r32 stock turbo's actuator on the rb25 turbo gives you a steady 10psi works well will be laggier how ever will pull hard right to redline unlike the stocko turbs

[nedb]

I got an early model too and had to change the water lines as the rb25 turbo needed larger bolts. U migh wanna change the compressor elbow pipe as well as the r32 one is slightly smaller.

The rest of you guys that have done this conversion, where did you connect the hose coming of the actuator? The R32 tubo has a nipple on it for the hose and the R33 doesn't.

[predator]

You need to nipple it off the piping before the throttle body.

[nedb]

At the moment I'm using one of the vacum lines of the plenum. Are there any problems with that?

[RedDrifter]

RB25 Turbo on RB20 Been there and done that and its a piece of cake to do.

Very good power upgrade for bugger all money.

[R32Big_boy]

Yeah, i just teed mine into the carbon canister line, no issues there. I'm finding that with my jaycar iebc i'm able to hold a steady 14psi without any issues at all, even did a track day at winton last weekend and didnt have any issues with it.

[Wazz]

I got an early model too and had to change the water lines as the rb25 turbo needed larger bolts

umm i didnt have to change everything : it all bolted straight up.. maybe mines not early model rb20? i dunno