Originally Posted by sheriffwoody
For strickly performance reasons: has anyone ever heard or removing the top balancer shaft and pluggin the oil holes? Im using a 93 3.8 supercharged motor in a sandrail and dont really car about a smooth engine.
Thanks in advance.
Yes, in fact, that was an option for me when rebuilding the Series II 3800, suggested by both the machine shops that I've been using. The crank can be balanced without a balancer shaft, but the engine will produce more vibration that way.
To do it, you will need to have the balancer shaft bearing pulled and reinstalled wrong (so that the oil hole through the balancer bearing doesn't line up with the passage in the block, effectively plugging the oiling system.) You will also need a hard ground spacer for the timing gear, or take the balancer drive gear and machine off most of it (to reduce it'* mass.)
That'* the whole idea of removing the balancer shaft..reduce the rotating mass of the motor and accept the increased vibration.