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Any reason to muffler mod a 372xp xtorq?

Discussion in 'Chainsaws and Power Equipment' started by J. Dirt, Dec 8, 2017.

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  1. Fabz

    Fabz Banned

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    You are correct on that muffler - it is stainless steel ... however the 372xp is steel to the best of my knowledge ... my point was u can easily drill em out and enlarge the hole rinse and repeat until you are satisfied with the performance... I suppose you can do the same by brazing it ; heating it to temp and after enlarging hole rebraze ... if concerned about the “longevity” of the aluminum rivers u can braze/weld or use nut/bolt washer and peen thread once you are at the desired opening size ...
     
    Fabz, Dec 10, 2017
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  2. huskihl

    huskihl

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    I believe instantly
     
    huskihl, Dec 10, 2017
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  3. Fabz

    Fabz Banned

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    Well my timing light must be off kilter because after machining the key .020 my timing advanced on the 261c to 28degrees ... I’ve run the saw for about 10 tanks and it doesn’t seem to have reset back to the stock setting ... in the interest of the truth I will check it and see if the mtronic challenged it back to stock and report the results
     
    Fabz, Dec 10, 2017
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  4. J. Dirt

    J. Dirt

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    I’m no expert by any means that’s for sure but I go 5psi acetylene and 20psi oxy with I think #2 welding tip just low and slow. It’s flux coated rod that’s probly 10 years old too :rofl: :lol: I think I got this one a little warm it seemed to flow out pretty far but looking to the inside there’s good filling so it works for me! Kind of fun to play around with. I’ve done a couple other mufflers and they are still together so I guess that’s what counts!:D
     
    J. Dirt, Dec 10, 2017
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  5. huskihl

    huskihl

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    I think you're close. You may have been a tiny bit hot or the tip too big, given the width of your braze. But it's pretty dang close
     
    huskihl, Dec 10, 2017
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  6. The Wood Wolverine

    The Wood Wolverine

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    Can I do it with a map torch? And the rods I had looked at were flux coated.
     
    The Wood Wolverine, Dec 10, 2017
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  7. Fabz

    Fabz Banned

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    Fabz, Dec 10, 2017
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  8. Redfin

    Redfin

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    What light are you using? Mine will not register past around 10k. Last time I heard Scott was also looking for a light that will work correctly where these saws wot.
     
    Redfin, Dec 10, 2017
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  9. huskihl

    huskihl

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    Probably. The problem is, the braze goes to the red metal. The wider your heat, the wider your braze
     
    huskihl, Dec 10, 2017
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  10. The Wood Wolverine

    The Wood Wolverine

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    Great advice, thanks Kevin. Is there a negative to it being wide?
     
    The Wood Wolverine, Dec 10, 2017
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  11. Fabz

    Fabz Banned

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    2-stroke timing light for nitro-fuel helicopters ... 17000rpm
     
    Fabz, Dec 10, 2017
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  12. huskihl

    huskihl

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    It gets thin also
     
    huskihl, Dec 10, 2017
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  13. concretegrazer

    concretegrazer

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    Brand/model?
     
    concretegrazer, Dec 10, 2017
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  14. Fifelaker

    Fifelaker

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    Remove about 95% of the flux from the rod with a wire wheel, pliers, knife or other means. It will help you out immensely.
     
    Fifelaker, Dec 10, 2017
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  15. mdavlee

    mdavlee

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    Tig welding is how I put all of mine on
     
    mdavlee, Dec 10, 2017
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  16. J. Dirt

    J. Dirt

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    :salute: Not bad for learning back in high school :D
     
    J. Dirt, Dec 10, 2017
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  17. J. Dirt

    J. Dirt

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    My next door neighbor is a welder and just bought a Tig set up as his retirement present to himself he said he’d teach me I can’t wait to test it out!
    i notice with all the flux on I have to be able to differentiate between molten flux and bronze while laying it down. Then after I’ve got a bunch of “glass” to chip or brush off especially if I’m going to paint it! Thanks for the tip I’ll give it a rip with a naked rod next time :bug::rofl: :lol:
     
    Last edited: Dec 10, 2017
    J. Dirt, Dec 10, 2017
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  18. mdavlee

    mdavlee

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    I do it all the time. I've swapped bottles about 4 times at home this year.
     
    mdavlee, Dec 10, 2017
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  19. concretegrazer

    concretegrazer

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    Been a long time since I tried & failed at brazzin. This was one of my issues. I'll have to retry. Thanks for the tip Fifelaker
     
    concretegrazer, Dec 10, 2017
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  20. J. Dirt

    J. Dirt

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    Last time I did it on my 55 muffler. Got done, hey this looks great painted it then put her to work and a few heat cools later the flux all popped to show my terrible braze
     
    J. Dirt, Dec 10, 2017
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