11/25 Racing Newsletter
Posted: Mon Dec 01, 2003 1:55 pm
The words of wisdow that I just read is dead on the mark. I've built maybe 150 motors, so my experiences are a little slim compared to those who really build motors. The mistakes that I most often see are monster carbs, cams, headers with everything else in between to damned small or weak. Just my 2 cents worth. Roger D Johnson
P.S. over sized crank bearings (for undersized journals) were a danger many years ago. The makers would pile the babbit and tin onto a standard shell (insert) to reach .020" or maybe .060". Those inserts were weak, but now all the makers of inserts use a steel shell of a pre determined thickness and then apply the soft metal as required to give a strong, long lasting surface for the journal to run on. i.e. The shell actually has the over size in the steel, not the bearing surface itself.
P.S. over sized crank bearings (for undersized journals) were a danger many years ago. The makers would pile the babbit and tin onto a standard shell (insert) to reach .020" or maybe .060". Those inserts were weak, but now all the makers of inserts use a steel shell of a pre determined thickness and then apply the soft metal as required to give a strong, long lasting surface for the journal to run on. i.e. The shell actually has the over size in the steel, not the bearing surface itself.
