Rb20det Trans. Toughness

[Miata Master]

I have an Rb25det with an rb20det transmission. Long story anyways.

I was wondering about how much torque these things can take. I was gonna turn my boost up to about 12 PSI on the rb25 If it can take it and I was gonna get a new clutch too.

I can use a 300zx N/A clutch Correct?An Rb25 trans is about 1200+ shipping correct?And I can use a stock 240sx Manual Driveshaft correct?Also if anyone has a manual Driveshaft s13 I would like to buy it, yars around here dont have any 240s, 1 friend has one I might get but other than that I'm SOL.

Thanks alot I did all my research on rb25 and then it turns out to have an rb20 trans BS. anyways thanks again
Modified by Miata Master at 10:34 AM 2/23/2005

[NISMO_RB25]

I have an Rb25det with an rb20det transmission. Long story anyways.I was wondering about how much torque these things can take. I was gonna turn my boost up to about 12 PSI on the rb25 If it can take it and I was gonna get a new clutch too.

You should be fine with the rb20 transmission. People have used them on 400+ HP cars. 12 PSI isn't going to be a lot more than stock of 8.

I can use a 300zx N/A clutch Correct?

Search, but I believe the answer is yes

An Rb25 trans is about 1200+ shipping correct?

That is pretty much what I have seen them going for, which sucks considering for 3K more you could get an RB26 with a RB25 transmission.

And I can use a stock 240sx Manual Driveshaft correct?

Search- but the answer is yes

Also if anyone has a manual Driveshaft s13 I would like to buy it, yars around here dont have any 240s, 1 friend has one I might get but other than that I'm SOL.

Sorry to hear that, I just gave mine away

Thanks alot I did all my research on rb25 and then it turns out to have an rb20 trans BS. anyways thanks again

[Wulfgang]

RB20DET transmission is very similar to KA24 transmission.

Go to a KA forum and check out the turbo'd cars' dyno sheets. You'll see that the KA transmission holds up quite well beyond 300 hp, which is about where you'll be.

[BoostFab]

near 500hp on the ka transmission for that matter...

[Sil240]

I thought you couldnt use the stock 240 driveshaft with the RB25??I know you can with the RB20, i could be wrong though. I would look into that

[Miata Master]

It is an RB20 transmission so I should be able to I think. If it was rb20 engine rb20 trans I know it would work.

[Carl H]

run a sprung hub and dont do 6k clutch dumps and you will be fine.be gentle with it and dont bang gears or excessive clutch dumps.

[Rbpowered]

i have a drive shaft for you e-mail me at [email protected]