Crankshaft balancing
Crankshaft balancing
(OP)
Hello,
I am trying to save a buck on crankshaft balancing and would like some opinions about what I'm doing.
I modified the crankshaft of a GM I4 to change the signal at the crankshaft position (ckp) sensor. This change added a small amount of metal to one side of the crankshaft at the ckp gear. I estimate the weight around 5 grams. Can I offset this by adding ~5 grams to the flywheel at the same distance from centerline? The flywheel is ~3 inches from the ckp gear.
I want to know if anyone thinks this will add vibration, or I should be adding 5 grams every 90 degrees of crank, etc. I am a noobie in the engine building world, so all info is appreciated.
Jim
I am trying to save a buck on crankshaft balancing and would like some opinions about what I'm doing.
I modified the crankshaft of a GM I4 to change the signal at the crankshaft position (ckp) sensor. This change added a small amount of metal to one side of the crankshaft at the ckp gear. I estimate the weight around 5 grams. Can I offset this by adding ~5 grams to the flywheel at the same distance from centerline? The flywheel is ~3 inches from the ckp gear.
I want to know if anyone thinks this will add vibration, or I should be adding 5 grams every 90 degrees of crank, etc. I am a noobie in the engine building world, so all info is appreciated.
Jim





RE: Crankshaft balancing
I'm struggling to remember what a crankshaft balancing tolerance is, 7 g cm rings a bell.
I wouldn't fret too much about the 3 inch distance, that seems OK.
Cheers
Greg Locock
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RE: Crankshaft balancing
Larry Coyle
Cylinder Head Engineering
Larry Coyle
Cylinder Head Engineering, LLC
www.cylinderheadengineering.com
RE: Crankshaft balancing
RE: Crankshaft balancing
Regards
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