Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 383 engine vibrations????
Thread: 383 engine vibrations????
View Single Post
  #3 (permalink)  
Old 08-10-2011, 12:49 PM
68NovaSS's Avatar
68NovaSS 68NovaSS is offline
Hotrodders.com Moderator
Wiki Editor
  
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket 		Last photo:
Join Date: Sep 2002
Location: Tri-Cities, Washington
Posts: 4,531
Wiki Edits: 9

Thanks: 15
Thanked 41 Times in 40 Posts
Quote:
Originally Posted by lmsport
Was it a balanced assembly?
Scat rough balances all their cranks but the assembly must be balanced to the rod-piston-flywheel at some point.
X2 ^^

Are you sure it's externally balanced? Assuming the crank, rods and pistons weren't balanced as an assembly? A 350 would be internally balanced OEM. You say you put on the old balancer, which should have been non-weighted for an internally balanced motor if it was stock, for an external balance you would have used a 400 balancer with the balancing weight adjustment "lump" cast into it. I'm assuming the flexplate or flywheel is externally balanced, has weights? Just curious if the sum of all the parts are compatible, and properly externally balanced. Odd that it's only vibrating within a 300 rpm range.
__________________
Horsepower is how fast you hit the wall.
Torque is how far you take the wall with you.

Midnight Sun Street Rod Association
Last edited by 68NovaSS; 08-10-2011 at 12:56 PM.
Reply With Quote