Light Plane Maintnance had an article on porting and polishing in the May
issue, and it was written by Mike Palmer.
If you are Mike Palmer, why are you asking again and why don't you use
you're own email address?





"JohnSmith" wrote in message
news:SQ3he.10087$D91.6833@fed1read01...
I've been asked to do an article on Porting & Polishing for The Aviation
Consumer as it pertains to certified engines. Would like some user
feedback, good or bad.

If you have a certified aircraft and had your cylinders Ported and
Polished:

- Why did you do it?
- How much did it cost (per cylinder)?
- Did the shop flow match or use a flow bench? ("Don't know" is okay
answer.)
- Did the shop do a fancy valve grind as part of the package?
- If you flew the engine before the change, and if that's all that
changed (i.e. no higher compression pistons) can you tell any
difference in performance? Any WOW! factor?
- How did climb, top speed, cruise speed and fuel burn change?
- Any problems related to P&P? (any cylinder cracking in the head?)
- If the shop worked the valves, did you have any problems with
valves before and are you having any problems now?
- What kind of paperwork, if any, discusses the modification to the
cylinders?
- Was it worth it? Would you do it again?

I would appreciate your input. Please respond to

mppalmer at a o l . c o m

Thanks,

Mike Palmer