Are Rb30E And Rb25Det Flywheels The Same

[luvpsi]

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.

[boostn0199]

No the 30 fly wheel is 8 inch dia and 25 is 9.5 there diff clutches.

[luvpsi]

i measured them both and they both 9.5 inches and the rb30et is 10inches

[boostn0199]

Hrmm always thought the 30 was smaller but anyway since there diff cant use them. Even if you go on the exedy site and search clutches for rb30 and 25 there different.

[bubba]

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.

[Rolls]

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 June 30, 2011 by Rolls

[Bl4cK32]

I thought rb25 vs rb20 were the same as well?

that they are.

[bubba]

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.

[Rolls]

redtop rb20det are smaller than silvertop rb20det though

[luvpsi]

cool so the clutch i have at home is a 5puk button clutch from a rb30e so if i use the rb30e flywheel and that clutch it should be fine

[boostn0199]

Yep aslong as clutch matches flywheel you can use whichever you want.

[blk94r33]

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

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

[Rolls]

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 June 30, 2011 by Rolls

[r33_racer]

RB30 crank has no dowel for the flywheel.

[Rolls]

RB30 crank has no dowel for the flywheel.

Does the dowel really matter? As long as you line it up properly

[r33_racer]

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.

[Rolls]

I cant imagine it was for shear, they would just change the bolts, plus it would add absolutely nothing. Im just wondering if theres another use, being as the bolts basically align it.

confused

[luvpsi]

whats the best way to align the flywheel seeing tho im goign to have to remove the dowel some how on the rb25

[Rolls]

Using the flywheel bolts? lol

[luvpsi]

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