Balancer and flexplate for ZZ4
Thread Starter
Senior Member
Joined: Oct 2003
Posts: 544
Likes: 2
From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Balancer and flexplate for ZZ4
I just bought a new zz4 shortblock with 1 piece rear main seal.
I now learn that this motor is externally balanced. I realize that I need the proper flexplate.
Will a fluid damper from a pre 86 350 work?
The damper that gm lists for the zz4 is the same as used in z/28s and L82 and LT1 engines. This leads me to believe that I can reuse my balance that was on an internally balanced engine.
Please comment.
I now learn that this motor is externally balanced. I realize that I need the proper flexplate.
Will a fluid damper from a pre 86 350 work?
The damper that gm lists for the zz4 is the same as used in z/28s and L82 and LT1 engines. This leads me to believe that I can reuse my balance that was on an internally balanced engine.
Please comment.
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Please, let's not start this again.
One-piece rear main seal flexplates/flywheels have a weight. This weight takes the place of a built-in weight on two-piece rear main seal cranks. This does not make one-piece rear main cranks "externally balanced", it makes them "one-piece rear main seal".
Just get a flexplate for one-piece rear main seal crank applications.
The harmonic damper is neutral balanced, just like every factory SBC damper except 400's.
One-piece rear main seal flexplates/flywheels have a weight. This weight takes the place of a built-in weight on two-piece rear main seal cranks. This does not make one-piece rear main cranks "externally balanced", it makes them "one-piece rear main seal".
Just get a flexplate for one-piece rear main seal crank applications.
The harmonic damper is neutral balanced, just like every factory SBC damper except 400's.
Thread Starter
Senior Member
Joined: Oct 2003
Posts: 544
Likes: 2
From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
Re: Balancer and flexplate for ZZ4
Thanks 57kid!
That the answer I was looking for!
That the answer I was looking for!
Thread
Thread Starter
Forum
Replies
Last Post
monte87cortez
Transmissions and Drivetrain
2
Sep 26, 2015 08:10 PM
roysatikas
Transmissions and Drivetrain
0
Sep 22, 2015 08:15 PM
