Can someone tell me how engine balancing works? Im going to be doing my first full on engine build. Does internal balanced asseblies need to be computer balanced on a ltx block is the weights are removed on the flywheel? are they internal or external balanced from the factory?

 

http://www.carcraft.com/howto/ccrp_0...ing/index.html

 

I think the consensus is to balance the engine as it came oem so you can use stock flywheels at a later date as it can be an issue finding a neutral balanced flywheel if the engine came externally balanced, but supposedly a neutral balanced engine is lighter on bearing wear. I am lazy and plan on having the machine shop put mine together with the flywheel so I can eliminate my incompetence as a reliability issue. Externally balanced as the general intended.

 

Be warned
http://forums.corvetteforum.com/c4-t...ozing-oil.html

 

yeah stay with the external balance method definately more options and less downtime and expenses should your dual mass take a dump, like mine, or change it out as a pre-caution.

if you have higher miles and will be running a zf6, you may want to get a newer dual mass as they are a wear item and lo and behold, i have one for sale! 360.00 shipped to the 48.

 

so if i go with a internal balance set up then I can always just use a zero balance flywheel for replacement?

does this mean I would have to pull the engine and have it re balanced if I had it externaly balanced?

also they make a internal/external balanced kit, which is internaly balanced on the front and external on the rear. i think this is how they came from the factory.

 

you don't have to pull the engine either way, what their trying to say is with a externally balanced engine, you have more options, since most stock gear, especially the dual mass flywheel is counter weighted, while aftermarket gear may have provisions for you to just unscrew the added weight while others reguire the same machining.

the delimma is the easier to obtain and machined single mass flywheel wheather steel or aluminum, may create loud noises in the car ( like loose rocks in a box) while in neutral with the clutch pedal out.

trying to zero a dual mass flywheel is a nightmare, while others here have been resourceful and successful, not many machinist would touch it, and if they do, their execution may border hack, and damage to the unit could occur, not a good gamble and this is what i am experiencing right now, not to mention the addtional expense, aggrevation and time,

and badgering this site ad infinitum.

and that is the overiding consideration when choosing the method in which the entire engine is balance,if you are driving a zf6 c4 corvette, and secondarily, cost of balancing,ease on the crank bearing, crank selected,

frankly if i could do it all over again, i would go with external balance.

you are right with the last comment.

 

Dang this is really confusing to me. So if my rear is external balanced then I can just buy a stock replacement flywheel if mine were to go bad? How to they re balance them then? sound like I will probaly be going with the internal/external kit so I can just throw on my stock damper. will my stock flywheel make the engine balanced then? or what will the machine shop have to do to balance it? and if I every replace it how is the new one balanced for my engine? sorry for my ignorance you guys have been great help?

 

You get the shop to balance your new rotating assembly with your ext balance flywheel.
Then any time in the future you can use a off the shelf ext balance replacement, even a flexplate if you were to change to auto

All SBC ex 400 are neutral at front.
The late 1 pce seal engines are "external" at rear because there is no room on the crank flange for the counterweight that is found on the early 2 pce cranks.
The factory made millions of ext rear balance engines