Rb25 Gearset In Rb20 Gearbox

[DUU MA]

hey guys just wanting to know if you can put rb25 gearsets into an rb20 gearbox. as im doing an rb25 conversion into my 180sx and rb25box would require a modifed tailshaft as for rb20 boxes its a direct fit with as im told.

so just wondering if it can be done?

[SteveL]

so just wondering if it can be done?

No. There's a reason the RB25 gearbox is bigger than the RB20 type.

[DUU MA]

thanks for that.

all i needed to know

[Roy]

If you can get a PPG or SR20 gearset they go into a RB20 box. I am looking for one myself

[DUU MA]

would a rb20 box be able to handle 230kw all day everyday??

street driving maybe with a soft clutch??

Edited March 1, 2009 by DUU MA

[WARDY32]

My 32 makes 250kw atw and im running a rb20 box, second gear synchro is rooted and the box whines like an annoying girlfriend in the 1st 3 gears, it is driven everyday with a 5 puck sprung center clutch.

At least it will give you a bit of an idea what to expect, i have a spare 20 box here but ill be fitting up the 25 box very soon

[DUU MA]

ahh see what you mean

[robots]

Can we use OS gearset for SR20 in RB20 box ? Anyone tried ?

[bubba]

would a rb20 box be able to handle 230kw all day everyday??

street driving maybe with a soft clutch??

I killed one with 183rwkw RB20 and one with 183rwkw RB30 (2nd one went a lot faster with the RB30).

Could have been the button clutch and too many 2nd gear clutch drops though..

[robots]

Again. Can we use OS SR20 gearset in rb20 box ? I don't have idea why can't we. Any info?

[Ronin 09]

Roy's been on an RB20 box with 260+ kw at the wheels.

he's not busted it yet.

treat it well and it'll be fine.

[bozodos]

Gee he must be gentle with it!

A mate managed to smash one in a HR 31 with a NICS RB20 with a R34 Turbo and Mines ECU! This wasn't from excessive thrashing either! :S

Mate 2 managed to smash one in a HR 31 Passage with a silvertop and GT2530 (don't know power figures for either, but not the best track record lol).

I'd be kinda wary of them myself.

[DUU MA]

whats the best clutch that can handle 230atwkw and isnt harsh for an RB20?