24-03-2017, 04:54 PM
(24-03-2017, 08:11 AM)welshpug Wrote: mig is useless, you need arc or gas rods.
This statement pops up every time someone asks this question..
Whilst I won't suggest that it's best practice to do so, you can, in my experience, successfully mig weld cast manifolds to turbos. I always cut as deep a vee as reasonably possible into the join (angle grinder with a grinding disc is good, to a depth of at least 5mm). I also preheat, because it seems to help get good penetration. Using this method I've yet to have a weld in cast fail despite people's suggestions that it won't work.
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