Re: maximum piston to wall clearance for 75mm vitaras?
 

All I know is my ---- slaps like your mom's ----- lips in a wind tunnel (even when at full temp) and I have 190,180,180,190 cold compression on a 75.5mm CP piston build.

Re: maximum piston to wall clearance for 75mm vitaras?
 

he meant tenths as in tenths of a thousandth

Re: maximum piston to wall clearance for 75mm vitaras?
 

Naw. When Machinists say tenths, they usually mean .000x. It's short for "ten-thousandths".

.0003 would be 3 tenths. Since most of the time when machining your talking thousandths, you don't typically think of a tenth as being .100.

Re: maximum piston to wall clearance for 75mm vitaras?
 

I run mine at around 35 tenth fifths of a mil

Re: maximum piston to wall clearance for 75mm vitaras?
 

that makes two of us.

Re: maximum piston to wall clearance for 75mm vitaras?
 

Re: maximum piston to wall clearance for 75mm vitaras?
 

He said in machinist lingo, a tenth is one ten-thousand of an inch (or as said, tenth of a thou), or .0001. I used to work at a place that did stuff for military and nuclear apps, and this is how they'd refer to specs. They had a carbon caliper that could read w/in .00005" through its full 36" of measurement, and $250k blocks of granite for parts mock-up documented & certified to be flatter than flat. They knew what they were saying. :1

Anyways my wisecos were set to .003" at the shop, and when the extra coating wears away, it ends up at .0033" (according to the phone person). I get no slap on cold startup, and minimal blowby (no more than stock). I did allow #2 and #3 to get an extra .0001" of clearance since they run a tad hotter.

As for vitaras, I'd go with .0035-.0040". The 75mm had a LOT of play in the blocks I tried them in, and people ran them fine that way. Just don't expect another 50k from cylinders/pistons with a .0065" clearance...

Re: maximum piston to wall clearance for 75mm vitaras?
 

YOu have no way to adjust for piston to wall with standard bore 75mm vitaras.... so its just throw them in and be happy...

In my car i had .006 with no problems, no blowby, no need to be re filling with oil at the end of the month..lol
..
JFK78 is running .008 clearance and he has 471whp....