Port and polishing a throttle body

**pontiacgt500** · 09-09-2015

hey guys im kinda new here, i took on a project for a friend to port ans polish his throttle body for his lexus and ive gotten the process of going over the inside with a grinding stone and got some material out so now im stuck as to what flap wheel grit to start out with on my dremel and how far to go up in grit and stop before polishing, any output or advice would be appreciated ive searched on how to's and diys but cant get a exact answer. Thanks!

**Scottydoggs** · 09-10-2015

try a Lexus forum? porting a tb usually requires a tune too.

i used carbide die grinder bits and a air die grinder. and then i used them sandpaper cones and drums to polish my heads. looked like 80 and 100 grit.