Topic: Matching Combustion Chamber Volume When Adding Quench Band?

[Blitzburgh207]

Tried to search for a while and I haven't found anything....

I bored my cylinders to 65mm, scribed the new diameter of the pistons to my head using the larger gasket and I just started to add a quench band by hand w/ the 'ol dremel.  Also, last time I rebuilt I deshrouded the valves and smoothed the chambers a little bit.  My question now is how can I make sure that the volumes of the chambers are all the same? And how important is it that they are all the same?  I matched them visually before and ran great last year..

Should the quench band be done by my machinist?

I haven't taken much material off yet and decided I would like some input from the experts before I go too far.... Thanks!

[HondaMan]

Get a sheet of plexiglass that is at least big enough to cover the chamber (mine covers all 4 at once). Drill a small hole (3/16") in it that is off to one side of the chamber when you lay it across a chamber to seal it closed. Use grease or Vaseline to make it seal, then, using a paint mixing syringe (WAY too big to take drugs with...), slowly fill a chamber with ATF (because it is red and easy to see) and count the CCs until it is full. Repeat for all 4 chambers. They should be within 0.2cc of each other for a 65mm bore. It is pretty easy to get them all much closer than that. Honda used 0.5cc variance for their production 'spec', but I have seen them as much as 1.2cc different on untouched engines in the K3 era!

[Blitzburgh207]

Great, thanks Hondaman! I'll pick up some plexiglass when I'm close to finished and try that out!