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Rb20box In 25det?

nsta

By nsta,
in Engines & Forced Induction

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nsta Mentor

nsta

Posted
Posted

Hey guys, just wondering if i should do this, as someones putting an rb20det gearbox in an r32 gtr.

The main advantage here to me is price, a 20det over here can cost near nothing, whereas the rb25 can cost up to $$2500!

Im converting my r33 gts25t auto to manual, and would like to know what you all think of this as an option????

Also, what other things should be upgraded at the same time when the conversion takes place???, is heavy duty clutch the way to go?if yes which type should i go for?

thanks

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Col-GTSX Grand Master

Col-GTSX

Posted
Posted

If you put an rb20 box behind an rb25....

You will blow that box earlier... On a standard motor you would not have a problem.... But if you wish to push a few extra kw's you will destroy the rb20 box....

My old r31 rb20 went thro 3 rb20 boxes in 12 months (241rwkw).... Got an rb25 box and never had a problem

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Cool Hand Luke Community Regular

Cool Hand Luke

Posted
Posted
A heavy duty clutch will just help you destroy the box more quickly.

Agreed. My RB20 180 blew 3 gearboxes in 3 months after a got upgraded the clutch.

Sure you save money getting the 20 box, but the hastle of them blowing its not worth it. Nothing worse than sitting on the side of the road waiting for a tow truck and being off the road. Doesnt take long to wear thin

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RB240Dav Enthusiast

RB240Dav

Posted
Posted

I don't know how redily available Z32 parts are over there, but the NA clutch and pressure plate mate right up to the rb25 box.

And if you ever manage to blow up the rb25 box (which won't happen), it has the same internals as the TT Z32 box.

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Bl4cK32 Grand Master

Bl4cK32

Posted
Posted
And if you ever manage to blow up the rb25 box (which won't happen), it has the same internals as the TT Z32 box.

Do you know this for certain? Have you done a rebuild using the 300zx internals?

My 25det box needs new bearings, and CBC dont list any parts for the rb25....

I need part numbers for a bearing kit in the rb25det box....

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