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To balance engine or not?

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Mark -

Balancing all the bits prior to assembly is cheap. Not more than a couple hundred bucks. It'll take the shop guy one or two hours to do all the work.

GIT'ERDUN

:thumbsup:
 
healynut, yup,yup,yup,yup,yup!!if its good enough for all aircraft engines its good enough for my healey, made a big improvement on my rebuild. :yesnod:
 
Interesting - I'm having my lower end redone due to a sloppy rebuild by the prior shop and having it balanced as well. Will be interesting to feel the difference....
 
mjobrien said:
Interesting - I'm having my lower end redone due to a sloppy rebuild by the prior shop and having it balanced as well. Will be interesting to feel the difference....
Click to expand...
While there should still be an improvement, don't forget that you're still going to have four (4) very big pulses for each revolution, ninety (90) degrees apart.

The inline 6-cylinder is inherently smoother, having a (power) pulse every sixty (60) degrees of crankshaft rotation. Balancing one of these still shows a marked improvement.
 
Randy Forbes said:
While there should still be an improvement, don't forget that you're still going to have four (4) very big pulses for each revolution, ninety (90) degrees apart.

The inline 6-cylinder is inherently smoother, having a (power) pulse every sixty (60) degrees of <span style="font-weight: bold">crankshaft</span> rotation. Balancing one of these still shows a marked improvement.
Click to expand...
Hi Randy,
Isn't that camshaft degrees? 180° crank rotation for a 4 cyl, 120° for a 6.
 
GregW said:
Randy Forbes said:
While there should still be an improvement, don't forget that you're still going to have four (4) very big pulses for each revolution, ninety (90) degrees apart.

The inline 6-cylinder is inherently smoother, having a (power) pulse every sixty (60) degrees of <span style="font-weight: bold">crankshaft</span> rotation. Balancing one of these still shows a marked improvement.
Click to expand...
Hi Randy,
Isn't that camshaft degrees? 180° crank rotation for a 4 cyl, 120° for a 6.
Click to expand...
Hmmph!

Always some <span style="font-style: italic">wiseguy</span> to come along and tell you that your engine is only half as good as you think it is...

:wink:

Well, it is still half again as many pulses as the Big Four gets.
 
$195 to balance my BJ8 engine. Another $80 to lighten the fly wheel. Think it is a good idea to do both.
 
I was thinking of having teh 100 flywheel lighened as well, anyone have a suggestion?

Drill holes or do some lathe work?
 
you want to first do the static balancing of all parts then dynamic balancing of the whole lot together.
 
Michael -

Buy the lightened flywheel that Bill Bolton sells. He has it all figured out and has cut about 8 lbs off the flywheel with no reduction in strength.

You actually don't want to cut too much more than that anyway, unless you are racing.
 
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