vivivivivibration

I have actually started up an External Balanced used 360 truck engine on the floor just to see if it would run before we made plans for it. We put a neutral balance converter and 1969 904 trans behind it so we could get a starter in it and fire it up . . it's the set we had at the time.

So this was a miss match right out of the gate, external balance 360 crank and balancer on a internal neutral balance torque converter. Started it up and warmed it up good. Had like an odd miss in it and was not smoothing out. Was playing with carb and timing to try and smooth it out, then we shut it down just knowing that it ran.

In hind sight, the rough running was the imbalance of the External Balance 360 and the Internal Balance 904 trans setup that we used to test fire it.

So knowing what that imbalance feels like first hand, I don't believe that is j.d. main problem here. JD was saying that it was a very minor vibration at first start up at an idle. Also he has taken it out and driven it for 8 blocks, so it certainly would have shaken a lot if the crank setup was out of balance.

He might have just needed some time for the lifters to pump up at first start up to get the valves working properly. Forgot to ask JD if he primed/pumped up the oil system with a drill before first start up, Having someone roll the engine over while priming the oil system with a drill is a good way to fill the lifters and get them pumped up before first start up.

Keep Digging . . .