My 1st decent drive of Model A and discussion

[Synchro909]

Originally Posted by M2M

Give me some figures. How many miles have you done on a rebuilt engine you have installed? Did any of the rebuild engines you fitted to your cars fail? If so, what happened?

I have never rebuilt a motor with babbit. All of my engines run on inserts and the middle main bearing is pressure fed by a beefed up oil pump. I've done many tens of thousands of miles on them but I keep my revs down by using the O/D. I travel at 50mph in O/D. That is about the same revs as a standard car would be doing at 40mph. By keeping the revs down to a resonable rate, I have not had a failure and I'm quite happy to leave it that way! The pump is able to maintain 25-6psi to the bearing and I belive it is the extra oil flowing through it that has made it able to last that long.
On some of our long outback trips, one of the guys who uses babbit takes along a rebabbited con rod and middle main bearing cap amongst his spares. I've seen him have to use them.