Originally Posted by
unterhausen
Those turned out great. And having the parts on hand was a really good idea. Hopefully those things get raced hard.
what filler are you using? Did you clean the rod before brazing? It seems to me that since I started using either Gasflux or Cycledesign I haven't had many pinholes at all. The stuff I got from the LWS was horrible for pinholes.
Your post makes me want to get a blasting booth even more though.
I am using gasflux brass and flux. I have found that using more flux can cause pinholes so, I have dialed that back.
My prep is pretty tight:
scotchbrite the filler rod and then wipe with alcohol/acetone right before brazing.
scuff all metal parts and wipe with alcohol/acetone right before brazing
flux everything with gasflux blue flux.
Add heat/rod
most were pinhole-free but a few popped up so, I need to pay a bit more attention to what else might be causing it.
thanks