Richard.
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- Messages
- 18,347
- Location
- Cambridgeshire
Pretty rainbows if that's what they want can be easily achieved through a no8 cup.It depends what you're doing and what people are paying for though, in no way needed to get a sound weld but exhaust customers don't know what they're looking at half the time they just see the pretty rainbows and think oh that must be good.
Heat input plays a much bigger part in achieving this than gas volume.
I can understand it for exotics that are actually damaged by heat tint like Ti but stainless I've never seen the need.