WV98GTS said:
Paolo, isn't MIG an acronym for Metal Inert Gas? I thought most MIG wire was mainly carbon steel alloyed with a few other elements to give it the desired properties. I've seen wire with Manganese and Molybdemum, but none with Magnesium. I'm no welding expert so I'm not saying it isn't our there. You say that stainless conducts heat, from surface to surface, better than mild steel. Stainless has a lower thermal conductivity than mild steel meaning that it doesn't conduct heat as well, so I don't understand what you mean by stainless being better for heat transfer from surface to surface. This does fall in line with what you said about keeping heat in the exhaust system though. Maybe I'm reading it wrong. I'm not trying to argue with you or dispute your expertise. I'm just trying to follow your line of thinking on this.
WV98GTS, you are correct about the Metal Inert Gas Acronym, I do not know what I was thinking as I checked the spelling and I know for sure I spelled magnesium correctly! :lol
I think you misunderstood part of my post:
I said, "So, all other things being equal(both either coated or noncoated), the stainless will keep the heat in the exhaust{ie more kinetic energy to spool the turbos} much better than mild steel."
You also said, " Stainless has a lower thermal conductivity than mild steel meaning that it doesn't conduct heat as well"
I think we are saying the same thing a different way. I am saying the heat will stay in the pipes with less radiating out(due to less thermal conductivity{your probably better description}
Here is my vague attmpt to describe a lesser thermal conductivity- "I would also like to add that stainless steel is much better than mild steel in allowing heat to cross the barrier from outside to inside or vice versa."
So, all I was saying is if there is less thermal conductivity with stainless, the exhaust gases between the collector and the turbo will have more heat ie kinetic energy to spool the turbo more quickly.
I appreciate your helping me clarify my post :thumb: