yes there was somewhere to input gasket thickness, which I did. What I meant was when it asks for "Piston down from TDC" does that value include headgasket
eg. if the rod and piston combo sits at perfect block deck height, and I'm using a 2mm headgasket do I put 2mm. Or does it mean how far below block height, which would be 0mm Dave ----- Original Message ----- From: "Chris Simpson" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, June 26, 2002 1:57 AM Subject: Re: Compression Ratio's > > David, > > I would have thought that there was a place to input the height of your > head gasket as even a std head gasket changes the compression ratio (i > think the std type of head gasket is normally about 0.7mm thick once > installed) > > You can always work it out manually and then check it, but im sure you'll > find that if you havent input it somewhere then the calculated compression > ratio will be higher than what it really is. > > By making the Below TDC to 2mm, will also alter the compression ratio in a > manner that it shouldnt. To keep it all good you really need to increase > the block height by 2mm into your calculation. This will keep everything > ok then. Your Below TDC number will also be 2mm and if you understand what > this maths teacher is rattling on about then you'll be cool > > Hope this helps, i know what i mean even if no one else does! > > Chris S > > David Costello writes: > > > I don't know if this is going to come out making the same sense as it does in my head, but here goes... > > > > I've used a compression ratio calculation program to work out what sized dish to get made on my new pistons. The software asked for "piston down from TDC". I've worked out a compression height for my pistons that ends up with them sitting perfectly at deck level of the block when the pistons are at TDC. So in the software I entered 0mm in the "piston down from TDC" value. > > > > My question is, does this value include head gasket thickness? If I enter 0mm will it assume 0mm below deck height, or 0mm below the gasket? > > > > I'm using a 2mm copper ridgecrest gasket, should I add 2mm onto my requested piston height? > > > > 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]/ ---------------------------------------------------------------------
