My 1st decent drive of Model A and discussion

[M2M]

Originally Posted by Synchro909

With a standard engine, I think 50mph is too fast on longer trips. I know there will be some who will poo-hoo that but from experience, the middle main bearing won't last. That's why I suggested a counter weighted crank - they ease the pain a bit on the middle main.
A Canadian friend (British Columbia) did a trip with 7 other Model As to Alaska years ago. They travelled at 42-50mph. 7 out of the 8 cars made it there and back fairly trouble free. The one that didn't was the only one with a plain crank. It didn't even get to the other end.The motor will take that sort of (ab)use for a while but eventually,...... Take a good pair of shoes with you!

What causes this strain you mention on the main bearing? Apart from counter weighted crank are there other ways to tackle it?

What counter weighted cranks are currently available?