Engine balance - from HB to Flexplate
Thread Starter
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
Engine balance - from HB to Flexplate
Engine is internally balanced 396 SB. Harmonic balancer is neutral balance, but flexplate (GMPP 14088761) has a weight on it. Why? Summit lists this a HD replacement for stock and their description lists this for internal engine balance, external balance style. What gives?
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Engine is internally balanced 396 SB. Harmonic balancer is neutral balance, but flexplate (GMPP 14088761) has a weight on it. Why? Summit lists this a HD replacement for stock and their description lists this for internal engine balance, external balance style. What gives?
Thread Starter
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
Rotating assembly is an Eagle internal balanced kit & the machine shop checked and verified the balance when they assembled the short block. If the weight doesn't matter then OK, but I don't want to be hanging unnecessary weights on a balanced engine. I have seen neutral balance flexplates offered at Summit. It puzzles me as to why a weighted flexplate would be hung on an internally balanced engine.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Rotating assembly is an Eagle internal balanced kit & the machine shop checked and verified the balance when they assembled the short block. If the weight doesn't matter then OK, but I don't want to be hanging unnecessary weights on a balanced engine. I have seen neutral balance flexplates offered at Summit. It puzzles me as to why a weighted flexplate would be hung on an internally balanced engine.
