Samuel Hagan JR
Well-Known Member
- Joined
- Jul 18, 2010
- Messages
- 4,569
What tools are you using for sleeve porting if you don’t have access to fancy machinery. What type of grinding bit works best?
As noted, for a nitro engine with a chromed sleeve leave it alone. If you want to change the timing, machine the block to reduce - put shims under the sleeve to increase. That doesn't change blowdown angle of course, but probably not something to mess with anyway for starting out.What tools are you using for sleeve porting if you don’t have access to fancy machinery. What type of grinding bit works best?
This is fact.Most of our currently available nitro engines don't need "porting". Maybe adjust the compression ratio, set the head clearance and work on the set up and prop. The time area numbers are pretty well dialed in it's not like the old days.
like 1980's engines?it's not like the old days.
Samuel, all positive comments here but getting back to your question, along with Charles Siler’s suggested tools, check out the EC Moore dental abrasives website. They sell a whole line of small, precision carbide dental burrs, along with rubber abrasive tips for final finishing, I prefer the “bullet” points in fine and x-fine. For prop finishing they also sell a large variety of small flexible abrasive discs and quick change mandrels, especially the mylar backed Moore Magnum line in 5/8 or 7/8 diameter in silicon carbide (aggressive ) or aluminum oxide (less aggressive) All are made to fit 3/32-1/8 collets on a Dremel rotary tool. Just take your time and think it thru as you go. It’s not the end of the world if you do make a mistake, and you’ll learn something new along the way.
http://www.ecmoore.com/
Enter your email address to join: