383 vibrations in motor HELP QUICK!!!!!!!!!!!
06-18-2007, 07:59 PM
#1
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383 vibrations in motor HELP QUICK!!!!!!!!!!! just built new 383 having a problem in the bottom end i think. used stock windage tray and stock oil pan on the windage tray rod bolts jst touched the tray didnt think it would be a problem car runs sik as hell 2nd gear burners into 3rd but like i said have a engine vibration if anybody ever had this problem please let me kno or what ya think could be wrong.THANKS
06-18-2007, 10:31 PM
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Originally Posted by 97LT1
sounds like a balance issue. Is it a M6? Flywheel 0 balanced?
06-18-2007, 11:39 PM
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LT1s from the factory are internally balanced in the front and externally balanced in the back. That means the stock flywheel/flexplate has a weight on it to balance the crank. Your 383 crank is most likely internally balanced. You need to get this fixed. Just take the flywheel to a machine shop and have it zero balanced.
06-19-2007, 07:57 AM
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Originally Posted by robby73z28
not sure what that means first time messn wit the lt1 its a 6 speed used everythng from old motor
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06-19-2007, 10:15 PM
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Sounds familar... I have the stroked crank in my car...I get vibrations from about 2500 on. The only difference is my car is an automatic. Could the flexplate be out of balance?
