Head chamber volume is 45.2cc for a U67 head Crushed stock head gasket thickness is 1.2mm which makes the volume of it about 7cc Deck height at TDC is Block height (227.45) - Conrod length (145.9) - Piston pin height (38.1) - Crank throw above crank centreline (86/2) = 227.45 - 145.9 - 38.1 - 43 = 0.45mm below deck Dish is 9.6cc according to ACL piston catalogue
approx ~8.5:1 Cheers, - Tom David Costello wrote: > Anyone here every used Desktop Dyno 2000? > > I'm having troubles getting accurate compression ratio figures from it > > > > just to test how accurate it was I put in all the figures from a motor > I allready knew the compression ratio for....a stock L20B > > > > Bore : 85mm > > Stroke : 86mm > > Head Chamber Volume : 45cc > > head gasket thickness : 0.13mm > > piston down from TDC : 0mm > > piston dish cc : 8cc > > > > those are the specs I've inputed and it's telling me the comp. ratio > is 10.08 : 1 > > > > have I done something wrong or is the software inaccurate? > > > > Dave > > > --membersozdat------------------------------------------------------- > OZDAT Mailing List Please Note:- > Send (un)subscribe requests to [EMAIL PROTECTED] > Send submissions to [EMAIL PROTECTED] > No unauthorised redistribution of this email > http://www.ozdat.com/ozdatonline/index.htm > http://www.ozdat.com/ozdatonline/listindex.html > http://www.mail-archive.com/[email protected]/ > --------------------------------------------------------------------- --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
