FWIW, 'true' MAPP gas hasn't been available for some time:
https://en.wikipedia.org/wiki/MAPP_gas
On 9/16/2019 11:23 AM, Peter J. Thomas via Shop-talk wrote:
> Propane is more than enough for these types of rods. Map gas only
> burns a few hundred degrees hotter than propane, unless you use oxygen.
>
> Straight thread should be fine. The purpose of the tapered NPT thread
> is form a mechanical seal but since you are going to braze straight
> thread should be fine. I sealed a radiator hole in the fins with the
> Forney rods no leaks, so a brazing a tapped hole should be more than
> adequate.
>
>
> On 9/16/2019 1:47 PM, Darrell Walker wrote:
>> Hi Peter,
>>
>> Thanks for the reply. Is propane or MAP gas enough heat for those rods?
>>
>> I forgot to mention, the pipe is 5/8â??. I could drop down to 1/2â??
>> (thatâ??s what I was going to do in the copper, then up to 5/8â?? with a
>> brass hose barf). But since Iâ??m brazing it, would straight threads
>> be OK? Technically, there is a 5/8â?? NPT size defined, but Iâ??ve not
>> found any taps or dies in that size.
>>
>> -Darrell
>>
>>> On Sep 16, 2019, at 10:32 AM, Peter J. Thomas
>>> <pj_thomas@comcast.net> wrote:
>>>
>>> Drill and tap aluminum, then solder with aluminum solder rods. HD
>>> carries Bernzomatic AL3 rods, though I like the Forney Easy-Flo
>>> Aluminum Brazing Rod sold at Tractor Supply better.
>>>
>>> On 9/15/2019 2:00 PM, Darrell Walker via Shop-talk wrote:
>>>> Iâ??m adapting a Land Rover intake manifold for use on my TR8. One
>>>> thing I need to do is add a connection from the manifold to feed
>>>> the heater. There is a place on the manifold that will work
>>>> perfectly.
>>>>
>>>> My initial plan was to tap the manifold for a copper fitting. But
>>>> will there be an issue with copper threaded into aluminum?
>>>>
>>>>
>>
>
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