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welding fins

Posted: Thu Nov 24, 2016 7:21 pm
by friday
whats the best option for welding fins on ali heads ?

Ive got indian 741 heads that will need a good half dozen fins built up , each. the gap between fins is 6mm . tight fit for grinding etc
Im still cleaning them

Re: welding fins

Posted: Thu Nov 24, 2016 11:17 pm
by Dusty-Dave
Tig one layer on top of the last, then grind and file to shape, then blast with steel shot. Trying to fit pieces and weld them into place never gives as good results. The 741 heads are a particularly hard alloy to weld. I don't know anyone to recommend any more, they have all either died or quit.