Topic: different piston clearances for outside pistons?

[Elan]

Getting my cylinders bored for an 836 build. I told the machinist .0008 to .0010"  clearance. He just replied with this:

"Got it.

I will set them up at .0010” for the inside cylinders and .0008” for the outside."


So I asked why different sizes and got this:



"On an air cooled motor, the inside cylinders always run  hotter.

I have bored about 1000 air cooled fours and I always do it that way."


Is he gonna f up my motor?

 

[ekpent]

Better tell him to hold up for a second till Hondaman.Mriek or somebody comes along.Don't think I would feel comfortable with that.

[Mark M]

You got yourself a switch on machinist, many wouldn't bother with that kind of detail to the job

[Elan]

Im thinking it can't hurt considering its still within spec regardless....

[ekpent]

Sounds like he has done a lot of them thats for sure.Guess if there was a problem he would have found it out.I know the multi cylinder two stroke sometimes had problems with the inner slugs..I will watch and learn.

[MRieck]

What kind of pistons. That is to tight for 99% of forged pistons. Where did you get those clearance #'s? MTC's have some much skirt taper they can be run that tight but they don't make an 836 kit as far as I know

[Elan]

What kind of pistons. That is to tight for 99% of forged pistons. Where did you get those clearance #'s? MTC's have some much skirt taper they can be run that tight but they don't make an 836 kit as far as I know

GOt it from this thread.....
http://forums.sohc4.net/index.php?topic=68776.0

What clearance are you thinking? They are cast, not forged

no name brand from overseas, but had the "art" sig