is that same as a small block? i bought a brand new one 140 lordco jobber
-- Edited by timbuk on Wednesday 14th of October 2020 09:21:18 PM
seventy2plus2 said
Oct 14, 2020
timbuk wrote:
is that same as a small block? i bought a brand new one 140 lordco jobber
-- Edited by timbuk on Wednesday 14th of October 2020 09:21:18 PM
Valid question. Mark IV 454's are externally balanced, and have a large counterweight on the backside of the flywheel. I believe small block 400's are also externally balanced, but not sure.
However, I'm not certain re the later 454's whether they're external or internally balanced.
73SC said
Oct 14, 2020
The simple answer is yes all 454 both Gen V and VI are externally balance however the flywheel spec changes for the variations and year made as to the counter weights.
I bought mine at Summit and I recommend Summit for this, they offer great performance products under their own name at excellent cost. I went to Summit and got the following tutorial or article on the 454 flywheels, easy to read and very informative:
Geez, I thought that would have been a Mark IV 454.
4SPEED427 said
Oct 15, 2020
Sure should be with a 1973 date on it.
timbuk said
Oct 15, 2020
so a small block one wont fit that ? 73?
seventy2plus2 said
Oct 15, 2020
timbuk wrote:
so a small block one wont fit that ? 73?
It'll fit, but 454's are externally balanced and have a large counterweight on the backside. Small block flywheels don't have the counterweight, with the possible exception of small block 400's. Without the counterweight the engine balance is thrown way off.
73SC said
Oct 15, 2020
Too quick with the typing, boys you are right, its still the easiest to get. Mark IV 1965 to 1990, Gen V 1991 to 1995, GEN VI 1996 to 2001
timbuk said
Oct 16, 2020
thx for that info clint
DonSSDD said
Oct 16, 2020
396-402-427 were internally balanced and the externally balanced 454 flywheels wont work on those early blocks, I have a 427 flywheel on my 409. 400 small block and 454 were externally balanced so basically they were the first GM externally balanced flywheels starting in 1970. 168 tooth small block flywheels will work on 396-402-427.
Just to clarify for future readers of this post.
timbuk said
Oct 16, 2020
more good info there don
65 SD L79 said
Oct 16, 2020
a member contacted me with the correct one. Thanx all
anyone have a nice one?
As in manual flywheel, not flexplate?
yepper. manual
is that same as a small block? i bought a brand new one 140 lordco jobber
-- Edited by timbuk on Wednesday 14th of October 2020 09:21:18 PM
Valid question. Mark IV 454's are externally balanced, and have a large counterweight on the backside of the flywheel. I believe small block 400's are also externally balanced, but not sure.
However, I'm not certain re the later 454's whether they're external or internally balanced.
The simple answer is yes all 454 both Gen V and VI are externally balance however the flywheel spec changes for the variations and year made as to the counter weights.
I bought mine at Summit and I recommend Summit for this, they offer great performance products under their own name at excellent cost. I went to Summit and got the following tutorial or article on the 454 flywheels, easy to read and very informative:
Click for Flywheel Info 454
1973 date code on block
Gen V - easy to find. check Summit.
Geez, I thought that would have been a Mark IV 454.
It'll fit, but 454's are externally balanced and have a large counterweight on the backside. Small block flywheels don't have the counterweight, with the possible exception of small block 400's. Without the counterweight the engine balance is thrown way off.
Too quick with the typing, boys you are right, its still the easiest to get. Mark IV 1965 to 1990, Gen V 1991 to 1995, GEN VI 1996 to 2001
Just to clarify for future readers of this post.
a member contacted me with the correct one. Thanx all