Speed RaZer Posted August 1, 2010 Share Posted August 1, 2010 Is anyone aware of a utlity that allows different Z engines with different head configurations and resulting compresseion ratios, and one that allows you to shave the head in steps to know the compression ratio results based on how much you shave. Thanks for any info you might have. Quote Link to comment Share on other sites More sharing options...
MAG58 Posted August 2, 2010 Share Posted August 2, 2010 Like this? OZ-Dat Design Utility Quote Link to comment Share on other sites More sharing options...
Speed RaZer Posted August 2, 2010 Author Share Posted August 2, 2010 Like this? OZ-Dat Design Utility Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted August 2, 2010 Share Posted August 2, 2010 As an aside, I'm more than happy to update that utility with any/all data you guys have. You can email it to me however you want, but the prefered method is to use the tool to add the things you have, then press the `Export' button towards the bottom, and email me the text that pops up at the very bottom. Then it'll take me 2 seconds to copy/paste it in. Regards, Dave Quote Link to comment Share on other sites More sharing options...
goodoldjam Posted August 2, 2010 Share Posted August 2, 2010 This maybe the program your looking for. http://www.zcarcreations.com/downloads.htm Quote Link to comment Share on other sites More sharing options...
Speed RaZer Posted August 5, 2010 Author Share Posted August 5, 2010 As an aside, I'm more than happy to update that utility with any/all data you guys have. You can email it to me however you want, but the prefered method is to use the tool to add the things you have, then press the `Export' button towards the bottom, and email me the text that pops up at the very bottom. Then it'll take me 2 seconds to copy/paste it in. Regards, Dave Dave, What I'm trying to learn is what impact shaving a head will have on compression ratio, for example if an E31 head is installed on a L26, and the resulting CR is 8.5:1, what will it be if the head is shaved .20, or .30 etc. If you can help wiht this it would be tremendous ! Thanks, Jerry Mitchell Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted August 5, 2010 Share Posted August 5, 2010 Jerry, To extend the calculator to do that would be pretty trivial given the following information: Is the combustion chamber a circle shape where it means the head gasket? And if not, what is the surface area of the shape that it is? (e.g. the Kidney shape found in P90 heads) With those two pieces of information calculating the change in combustion chamber volume for a given shaving amount will be quite easy, assuming for very small shaving values, such that the change in surface area as you progress `deeper' into the head is minimal. Perhaps in the mean time I'll add a shave field with the head value that just assumes the combustion chamber is a circle and the same size as the bore? Dave Quote Link to comment Share on other sites More sharing options...
Speed RaZer Posted August 9, 2010 Author Share Posted August 9, 2010 (edited) Dave, I'm specifically working on an E31 head , which has the quench chambers like the P90, (egg shape) and a L26 engine. I don't want to cut the haed too much, but I'm trying to get to around 10: 1 CR. Thanks, Jerry Mitchell Edited August 9, 2010 by Speed RaZer Quote Link to comment Share on other sites More sharing options...
thehelix112 Posted August 9, 2010 Share Posted August 9, 2010 Jerry, I'm afraid I don't have an E31 head lying about, if you could take a photo of the combustion chamber and some basic measurements I'll be more than happy to have a crack at it. Dave Quote Link to comment Share on other sites More sharing options...
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