87GTR

iTrader: (61)

Well during my 20B swap in my Cosmo, I used a 13B S5 T2 OEM flywheel that has the counter weight built in. Well after 1st start I can tell right away that it is out of blance, after about 1500 rpm it really shaking. so I am not driving it around. I will be going to swap out flywheels and counter weights soon.


LOL I have both a cosmo 20B and cosmo 13B RE counter weight in my spare parts box but I didnt lable them. Is there an easy way to look at them and tell which one is which? Or how much should they weigh?

Jeff20B

iTrader: (13)

20B 5 pounds. 13B 4 pounds.

bcool

Just curious the reason you didnt go with an aftermarket flywheel?

87GTR

iTrader: (61)

thanks for the weights

Well my project started orginally to convert my 13B Cosmo from AT to 5 speed, haltech, T04R. I had picked up a brand new OEM flywheel a few years ago in a auction, and was going to use it on the 13B engine. While I had my engine out of the car the project changed to 20B. And not thinking about it, I took the flywheel off the 13B and it on to the 20B engine. I have a ACT flywheel that if I have enough time this coming weekend I will swap out.

87GTR

iTrader: (61)

here is a few pictures.

13B RE counterweight is thinner and the keyway at 12:00 position
20B is thicker and the keyway is offset

R0tary P0wer

Is There Any Way You Cam PM Me The Counter Weight NUmerbs Front & Rear, Thanks Alot

ChipsMotorsports

iTrader: (4)

NF01-11-d600 front
NF01-11-5210 rear

steidel_team

thanks for the info..