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Not sure if this in correct section so mods please feel free to move to correct section.

i was wondering if the rb30e clutch will fit a rb35det. are they the same i just have a recently machined flywheel from my rb30e sitting around and instead of getting my rb25det one machined i thought i would just swap them over.

I think the RB30E clutch disc is smaller diameter (like RB20) than RB25/26 but all flywheels bolt to all cranks (with the appropriate bolts, I believe RB25 and RB26 are different lengths) and RB25 clutches bolt to to RB20 flywheels.

The rb30e flywheel is identical to rb20de, I know because I used one for my old skyline. I thought rb25 vs rb20 were the same as well?

Either way just match the flywheel to clutch, you can use any RB flywheel on any RB motor, just make sure you get the clutch to suit.

I'm fairly sure rb30et is bigger than rb30e from what I've read.

Edited by Rolls

Must have been the RB20DE I was thinking of then but yes, everything bolts to everything. Last night I bolted a 25 flywheel to a 30 crank using 25 flywheel bolts and bolted a 25 clutch to it. I've also used a 25 clutch on my old RB20 no dramas, then transferred the same clutch and flywheel to the original 30 we built.

I've read a few times that all RB flywheels were the same/interchangeable?

Out of interest, anyone know the weight of each??

Yeah I am 95% sure of this, I do know that the rb20det and the rb30e are identical for a fact though.

They should all weigh identical.

As I said earlier the rb20e, et, and redtop det are different though.

Edited by Rolls

Probably not a great deal. But it does maintain alignment and take some shear load off the bolts. Nissan added it to newer models, you would imagine there would be some merit to it.

Im not saying its a big negative or anything, was just pointing out a difference.

oh so it can go on anyway i thought it might have to on a certain way. will the dowel on the rb25det crank come out or will i have to grind it off just obvisouly the rb30 flywheel not going to fit iff a dowel is there

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