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

 

sounds like a balance issue. Is it a M6? Flywheel 0 balanced?

 

not sure what that means first time messn wit the lt1 its a 6 speed used everythng from old motor

 

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.

 

Like mentioned you flywheel has a balance weight on it. Your going to kill your bearings running it if that is your problem.(which it sounds like)

 

just like these guys said i also had to take my flywheel to the shop to get them to zero it because it would have vibrated on my 383

 

how long would it take to ruin the bearings ya think probly 50miles or so

 

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?

 

take the weight off