Quote:
Originally Posted by baz-r
maybe if its preheated my zetec sump i welded at 140-180a 20% cleaning but my tig is fixed freq @ 75Hz (i think)
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crumbs thats a lot of current for that. what welder are you using its not a Chinese one is it?
on the sump for my saab engine it was 4mm thick cast and it welded up lovely using around 90-100 amps, can never know exactly as i just give it more pedal if i need it. cast ali is always a strange thing to weld some times it melts like butter and other times it is a pain to get heat into, just depends on the composition.