prechambers mods?
prechambers mods?
My 11/32 drill bit got dull after 6 holes- I went to Lowes and bought a DeWalt DW1311 Titanium speed tip bit for maybe $4. Cut right thru the next hole with ease; five more to go. After the first the first PC I started using some oil on the drill bit, since the PC in a vice and I'm drilling by hand I don't use much oil however. I also used 220 grit emery cloth afterwards on the drilled areas to smooth the edges out.
EDIT: Ha! that drill bit cut three holes and was dull. The cobalt version of the DeWalt (DW1211) was 10 cents more and it lasted longer.