[Devine]

I was planning to weld my MM full length subframe connectors on tomorrow. I'm reading through the instructions again, and they specifically say to use a MIG welder. I've got a friend in the boilermakers union that is going to do the welding for me, and he has a TIG welder. After speaking with him about it, it sounds like the TIG will work better than the MIG, but I'm curious if anyone could think of a reason why MIG would be better?

[Onemanzu]

TIG welders in general are better for everything, except mass production of parts. with a tig you can control the temp better, but it takes more time... if your friend has it and wants to do it with a TIG let him

[Drick]

I did it with a MIG really it wont make much of a difference. As long as you get the welded on good they will be fine. But like OMZ said if your friend really wants to weld them on with a TIG let him

[invisa stang]

the TIGs produce a stronger weld then the MIGs so i think if he wants to do it you have nothing to lose

[Devine]

Thanks guys, that's exactly what I was thinking.

The MM instructions made me second guess myself, it says a MIG welder must be used.

[mattstang]

a mig weld will be better unless you can turn the car over. you wont be able to control your heat unless you got a slide control. and the HAZ (heat affected zone) is smaller and more focused leading to stress on one point. its possible to make a good weld with either but youll end up with a better weld with a mig.

[Stangzilla]

Originally Posted by invisa stang the TIGs produce a stronger weld then the MIGs so i think if he wants to do it you have nothing to lose

You right but if you have someone that knows how to weld then in the case of frame connectors it really dont make a difference.. It will be plenty strong enough either way. Hell you could even ARC weld them and they will never break as long as you know how to weld. Just have to bust the slag off after ARC welding.

[mattstang]

Originally Posted by Stangzilla Hell you could even ARC weld them and they will never break as long as you know how to weld. Just have to bust the slag off after ARC welding.

by arc you mean SMAW. there's no reason to bust slag off other than to check weld for pinholes. the problem with doing it with smaw. you put in alot of heat. most people dont know how to weld parts like this. and what rod classification.

[Stangzilla]

Originally Posted by mattstang by arc you mean SMAW. there's no reason to bust slag off other than to check weld for pinholes. the problem with doing it with smaw. you put in alot of heat. most people dont know how to weld parts like this. and what rod classification.

Yeah but I was just explaining by saying ARC because most people know that means "stick welding". And yeas there is a reason to bust the slag off because you want to paint the welds and the part of the connectors that are bare metal. Thats what I would do... But thanks for your input though..

[mattstang]

Originally Posted by Stangzilla Yeah but I was just explaining by saying ARC because most people know that means "stick welding". And yeas there is a reason to bust the slag off because you want to paint the welds and the part of the connectors that are bare metal. Thats what I would do... But thanks for your input though..

yea the paint is a reason to as well.

but the slag does no harm. thats what i thought you were getting at.