My guess would be to use the deck hight as 0 if you already have factored the gasket thickness in there. ----- Original Message ----- From: "David Costello" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, 26 June 2002 2:30 AM Subject: Re: Compression Ratio's
> 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]/ ---------------------------------------------------------------------
