cc tool diameter

elvisisgod · Post by **elvisisgod** » Mon Jan 20, 2003 3:41 am

i want to measure the cc of my heads. i can get the discs cut and drilled to exact sizes but need to know the diameter!! for a standard 1600 head i presume i cut them to the outer diamter of the cylinder (- a couple of though that i will smaer with grease to get a good seal) any advice/help/abuse welcome

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viva las vegas baby

vicsvw · Post by **vicsvw** » Mon Jan 20, 2003 2:55 pm

85.5 is Piston Diameter so just add about 1/8" to that.

Post by **Marc** » Mon Jan 20, 2003 3:05 pm

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by elvisisgod:
<B>for a standard 1600 head i presume i cut them to the outer diamter of the cylinder (- a couple of thou...)

</B><HR></BLOCKQUOTE>

Nominal dimension is 93.8mm; you can always file/grind/sand it down later I suppose but don't make it fit too snugly or it'll be an annoyance to pull out (the grease doesn't need to fill the whole void, just a film around the perimeter of the face will do).
Here's a tip - drill the "fill hole" well off-center, it'll make it easier to chase the bubble when the chamber is almost full. If you use a center-piloted cutting tool you'll need to epoxy the center hole shut.

elvisisgod · Post by **elvisisgod** » Mon Jan 20, 2003 3:15 pm

chears guys

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viva las vegas baby

bartman · Post by **bartman** » Mon Jan 20, 2003 3:46 pm

Nominal dimension is 93.8mm

i just measured my 85.5 mm kymko cc disc and it's about 93 and a half or so.

[This message has been edited by bartman (edited 01-20-2003).]

[This message has been edited by bartman (edited 01-20-2003).]

RT · Post by RT » Mon Jan 20, 2003 5:25 pm

Like Marc said. Drop the plexi-glass disc into the head. Mark the spot to drill a 5/64" hole at a point just at the inside edge of the combustion chamber. After the hole is drilled, use a 5/16" drill to put a taper on the "outside" end of the hole. It helps for filling with the 60ml syringe you can pick up for a couple of bucks at any farm supply. You don't need the actual needle unless you feel like sharing with a bus-load of junkies.