11/25 Racing Newsletter

General engine tech -- Drag Racing to Circle Track

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Roger D Johnson

11/25 Racing Newsletter

Post by Roger D Johnson » 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.

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Bearing Material

Post by speedtalk » Mon Dec 01, 2003 4:20 pm

Hey Roger, you're dating yourself with the bearing info :D
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