I’ll share my experience with cast iron welding (brazing).
My son used to race Quarter Midgets. The fastest class in QM’s was AA. This class used ONLY old WWII surplus pumps from Continental. The engine blocks are cast iron and are not being reproduced in any form or fashion. These things are being run at RPM’s they were never ever designed for (12-13,000RPM's). As a result, they blow up if not rebuilt frequently (every 4-6 races or so) and well maintained.
When they do blow up. people will go out onto the track and pick up the cast pieces (hot, very hot) and give back to the respective owner. The owner can then have them brazed back together like a jigsaw puzzle, for a future run. Not cheap, but nothing about that class was cheap.
This brazing can be done with success, even on supporting areas around the crank. The trade off is that cosmetically, it may not be desirable.
I have 2 of these engines in the basement, expensive paperweights. Each shows signs of previous catastrophic failure, from some prior owners.
Posted by: Richard Osborne <reomotorsports1@xxxxxx>
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