for using the die grinder what bit should I use

 

I would use a cut off wheel and go around the lip. That is the fastest I have ever done it. They use a carbide bit and radius the inlet. Do not use a stone. It will get hot quick and you will get a nice coating of aluminum on your bit and render it useless.

 

I used an air-powered die grinder with a cut-off disc. Then I used a flapwheel to smooth it all down real good.

 

I have had promblems with the carbide bit fulling up with aluminum and that why I haven't done the mods yet.

 

Please dont use carbide bits to port aluminum. You use non-ferrous(sp) and you wont have that problem. Also make sure to use gear oil as lubricant.

 

Non-ferrous (sp) What? tell me more

 

a ferrous metal contains iron, and a non ferrous metal does not.

carbide is made up of ferrous metals. and since the metal is harder then what you are grinding instead of actually wearing away, exposing a new cutting surface, it will become clogged with the softer metal.

which is why using a non-ferrous cutting tip will not get clogged.

 

Where can I get one thanks for the help

 

Summit sells them.

 

Bought a bit a napa for 28$ and was made for aluminum wow made that job fast and snapper motor know to

 

this one...

its IS a carbide bit, HOWEVER i beleive the design is what keeps it from EVER getting clogged, it also has not dulled after doing about 4 tb's.

I then used sanding drums starting with coarse then going to a finer grit.