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CCing Pinto Head
flathatmat - 14/8/07 at 05:04 PM

What do you need to CC a pinto head? Is there a kit you buy or what have people done in the past?
Thanks

rusty nuts - 14/8/07 at 05:09 PM

You need a burette and a piece of fairly thick plastic with a filler hole and a breather hole

flathatmat - 14/8/07 at 05:12 PM

Tell me more!!

MikeRJ - 14/8/07 at 05:18 PM

quote:
Originally posted by flathatmat
What do you need to CC a pinto head? Is there a kit you buy or what have people done in the past?
Thanks


The idea is to measure how much liquid (usualy parafin to reduce meniscus) it takes to fill the chamber. An accurate syringe is probably the easiest fluid measuring instrument to get hold of, but a burette or large pipette is better.

A fairly comprehensive guide to measuring CR.

indykid - 14/8/07 at 05:23 PM

grease the backs of the valves on the seats so they're water tight, grease around the face of the head around the combustion chamber and lay the acrylic onto the grease and press it down so it seals.

you want one hole for the liquid to fill the chamber from the burette, offset to one side of the combustion chamber, and the vent hole next to it to allow the air in the chamber to escape. set the head roughly level but with the fill and vent holes ever so slightly higher.

using the burette, fill the chamber until the meniscus of the fluid reaches the fill and vent holes. read off the amount of fluid lost from the burette and that's your chamber volume.

tom