Internally vs. Externally balanced?
Team Owner
Joined: Apr 2002
Posts: 62,198
Likes: 1
From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Special balancers and flywheels are required.
the Later GM small blocks (86+) are externally balanced in the flywheel.
the Later GM small blocks (86+) are externally balanced in the flywheel.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
don't know what justins doing may be still scrathing his head looking
for the answer. the right way to balance a crank is internaly on the counter weights. to keep from spending money for new block
castings to clear bigger crank counter weights needed for long
strokes they took the cheap way out and added some balancing
in the flywheel and balancer, it works but not the best way to
balance a crank.
for the answer. the right way to balance a crank is internaly on the counter weights. to keep from spending money for new block
castings to clear bigger crank counter weights needed for long
strokes they took the cheap way out and added some balancing
in the flywheel and balancer, it works but not the best way to
balance a crank.
Last edited by Little Mouse; Jul 22, 2006 at 11:42 PM.
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Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Originally Posted by dwncchs
Do the 383 I hear talked about use exterior balance?
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Originally Posted by Little Mouse
there is no comparison internal balance hands down.
Internal is the way to go. 383 kits are internal or external balance depending on what you order. Internal is definetly the higher quality option.
Burning Brakes
Joined: Jan 2004
Posts: 1,043
Likes: 4
From: Va
Internal the only way to go. When I had my 383 built I shipped the flywheel/pressure plate/clutch to have them all balanced together, that's what the builder recommended for a performance set-up. No vibration issues.
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
Agree,..go internally balanced if given a choice. Even 400 cranks and 454 cranks are being made for internally (neutral) balance.
Using the balancer and the flywheel to balance the crank is iffy business.
And if your engine builder doesn't ask for your flywheel and balancer (at least) when it's time to balance the engine,..find another builder.
Using the balancer and the flywheel to balance the crank is iffy business.
And if your engine builder doesn't ask for your flywheel and balancer (at least) when it's time to balance the engine,..find another builder.
Instructor
Joined: Feb 2006
Posts: 144
Likes: 0
I don't really see the point in balancing an engine internally with the harmonic damper/flywheel and clutch in place.
I have my engines balanced internally without any of theese items, i usually use a fluiddamper anyway, and i have my clutch and flywheel balanced by themselves, that way i dont have to have it all rebalanced if i decide to add another flywheel/balancer or clutch.
I have my engines balanced internally without any of theese items, i usually use a fluiddamper anyway, and i have my clutch and flywheel balanced by themselves, that way i dont have to have it all rebalanced if i decide to add another flywheel/balancer or clutch.
Racer
Joined: Dec 2004
Posts: 336
Likes: 0
From: crystal lake Il.
I didn`t get a big buck 383. The way I understand it is the rotating assembly is balanced and then you add the dampener and external balanced flexplate. Thats the way mine is and I believe most crate engines. I have no vibration issues.
