Quote:
Originally Posted by sfm6s
I am rebuilding a 390gt engine and I noticed that the flywheel (std cast iron) has a slight imbalance built in - a raised section on the back face, 2.5" wide in a 90 deg quadrant. Given that the engine is internal/neutral balance why is there any flywheel imbalance at all?
|Cheers
Colin
|
Are you calling it a 390gt engine based off of casting numbers? Have you actually measured the stroke? It is possible someone has dropped a 428 crank in a 390 block, in which case that crank would be externally balanced.