Flex plate counter weight?
Thread Starter
Junior Member
Joined: Apr 2004
Posts: 69
Likes: 0
From: Saskatoon, Sk Canada
Car: 1987 Camaro Z28
Engine: 5.7 HO TPI
Transmission: 700r4
Flex plate counter weight?
I have a stock 350 HO out of an 87 IROC Z. Is my flex plate supposed to have a counter weight on it? I am not using the origional one and I dont know what it looks like. I am putting it into my 87 Z28.
Thanks all
Dennis
Thanks all
Dennis
Supreme Member
Joined: Apr 2001
Posts: 4,969
Likes: 0
From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Dimented is right.
The 2 pc rear main seal (r.m.s.) blocks have a "counterweight" on the rear of the crank. It's basically done by offsetting the rear flange so more weight is on one side.
When GM went to the 1 pc r.m.s., the rear flange was changed to a full 360*, symmetrical circle. They lost the counterweight on the rear flange by doing this, so they put it on the flywheel instead.
Don't worry about getting them mixed up. The 1 pc r.m.s. cranks have a smaller bolt pattern where the flywheel/flexplate bolts on. They're not interchangeable.
Even if you tried to use a 400 flexplate/flywheel it won't work.
The 2 pc rear main seal (r.m.s.) blocks have a "counterweight" on the rear of the crank. It's basically done by offsetting the rear flange so more weight is on one side.
When GM went to the 1 pc r.m.s., the rear flange was changed to a full 360*, symmetrical circle. They lost the counterweight on the rear flange by doing this, so they put it on the flywheel instead.
Don't worry about getting them mixed up. The 1 pc r.m.s. cranks have a smaller bolt pattern where the flywheel/flexplate bolts on. They're not interchangeable.
Even if you tried to use a 400 flexplate/flywheel it won't work. Thread Starter
Junior Member
Joined: Apr 2004
Posts: 69
Likes: 0
From: Saskatoon, Sk Canada
Car: 1987 Camaro Z28
Engine: 5.7 HO TPI
Transmission: 700r4
Originally posted by AJ_92RS
Dimented is right.
The 2 pc rear main seal (r.m.s.) blocks have a "counterweight" on the rear of the crank. It's basically done by offsetting the rear flange so more weight is on one side.
When GM went to the 1 pc r.m.s., the rear flange was changed to a full 360*, symmetrical circle. They lost the counterweight on the rear flange by doing this, so they put it on the flywheel instead.
Don't worry about getting them mixed up. The 1 pc r.m.s. cranks have a smaller bolt pattern where the flywheel/flexplate bolts on. They're not interchangeable. Even if you tried to use a 400 flexplate/flywheel it won't work.
Dimented is right.
The 2 pc rear main seal (r.m.s.) blocks have a "counterweight" on the rear of the crank. It's basically done by offsetting the rear flange so more weight is on one side.
When GM went to the 1 pc r.m.s., the rear flange was changed to a full 360*, symmetrical circle. They lost the counterweight on the rear flange by doing this, so they put it on the flywheel instead.
Don't worry about getting them mixed up. The 1 pc r.m.s. cranks have a smaller bolt pattern where the flywheel/flexplate bolts on. They're not interchangeable.
Even if you tried to use a 400 flexplate/flywheel it won't work. Jee I love this place. I can find out all I need to know from the people with the know how.
Thanks Again,
Dennis
Thread
Thread Starter
Forum
Replies
Last Post
monte87cortez
Transmissions and Drivetrain
2
Sep 26, 2015 08:10 PM
Damon
Tech / General Engine
8
Sep 26, 2015 04:29 PM
