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.

 

he meant tenths as in tenths of a thousandth

 

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.

 

that makes two of us.

 

 

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...

 

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
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JFK78 is running .008 clearance and he has 471whp....