One other option is available. All the following is true if you run stock cylinders and pistons. But may I say, if you run with LN Engineering Pistons, Cylinders and have them CNC your Casing you eliminate the Sims. They have also reengineered the tie rod studs and anchors. Then you can choose the compression ratio by boring the piston at a precise position to make the C/R what you want. All aluminum material from piston to heads, including cylinder.
KRron > "Deck height" on VW's is usually considered to be the distance from the top > of the piston to the top of the cylinder, not to the head (although I guess > they are actually the same thing, since the head is pulled up against the > cylinder). Since the head is the combustion chamber, and you can't measure > it anyway, the deck height is the distance that the piston sits down in the > cylinder (or sticks out). Basically, it's whatever you set it to be by > using shims between the cylinders and the the engine case. It's not just a > number that is set in stone, but a number that you determine you want it to > be based on what compression ratio you want the engine to have. Then you > put the shim that gets you closest to that number under the cylinder to set > it. I did a web page on how to check it at > http://home.hiwaay.net/~langford/corvair/trial_assy.html , but you'll also > need to know the combustion chamber volume to calculate compression ratio, > and that was shown at http://home.hiwaay.net/~langford/corvair/valvejob.html > . If you take a stock engine and bore it out to 1835, your compression > ratio will almost certainly be higher than it should be for aircraft use, > but I guess that's a matter of opinion. I feel strongly that everybody > should cc their chambers and KNOW for a fact what their compression ratio is > on all four cylinders. Otherwise you're just guessing what's going on in > your engine... > > Mark Langford, Huntsville, AL > N56ML "at" hiwaay.net > see KR2S project at http://home.hiwaay.net/~langford > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to [email protected] > please see other KRnet info at http://www.krnet.org/info.html > >
