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Ive had a similar deal with MAPP. After a bunch of heating it gets small joints hot enough to get brass to melt. But by that point the whole thing is so damn hot i don't reckon it has any structural value at all.
I did these joints with mapp, pretty small bit that i cut off an old steel frame and mitred up super quick.
There is a fillet i guess? hah its pretty dodge, definitely not gonna replace oa any time soon.Luckily i get to play around with OA at my uni in termtime. But i cant be building any bikes there atm :(
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Biggles567
M_V
Late reply but kinda relates to something I came here to ask...
I've been playing about with Mapp for a couple years now. I find it works fine with silver but I have real trouble using Sifbronze rods, just doesn't wanna melt/take to the joints I've been trying to make.
My question to @coldharbour or anyone else that cares to proffer an opinion, are oxy mapp or oxy turbo setups a worthwhile upgrade to plain mapp?
As with @Biggles567 I'm struggling to justify the expense and extra effort in sourcing bottles etc to go full oxy acet but I wanna do stuff that's out of the scope of mapp.