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Registered
Join Date: Aug 2001
Location: Spartanburg,SC,USA
Posts: 244
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2.0 Compression ratio and Performance
OK, Im using a "EA" 1.7L Block, 2.0L stock Crank, 94MM COFAP Pistons, 1.8L FI Heads, Can anyone out there tell me the compression ratio? How well will this combo perform with a Engle 2202 Cam(278 Duration and 410 Lift) and dual 44 Webbers?
------------------ Duane [This message has been edited by piperpilotduane (edited 08-07-2001).] |
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08-07-2001, 02:28 PM
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Registered
Join Date: Feb 2001
Location: Aircooled Heaven
Posts: 1,054
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To calculate compression ratio, we need 3 things:
*Cylinder head volume, measured in CC *a measurement taken from TDC to the top of the cylinder, measured in thousandths of an inch *The amount of "dish" in the top of the pistons, yours should be 7cc, if they are cofap.. Until we get this, there is no calculations that can be made.. I would SERIOUSLY think about adding that Engle cam to file 13, and grabbing a Web Cam! Jake Raby Raby's Aircooled Technology http://www.aircooledtechnology.com |
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08-07-2001, 02:49 PM
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If you have Microsoft Excel this is a nice spread sheet to figure compression.
http://www.pelicanparts.com/914/technical_specs/914_compression_ratio.htm I measured the dish on the Cofaps I had and it measured at 7cc. ------------------ Chris 75 914 2.0L |
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08-08-2001, 05:36 AM
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Join Date: Nov 2000
Location: Upper Back Bay Newport Beach California
Posts: 3,287
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08-08-2001, 05:45 AM
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Registered
Join Date: Jul 2001
Location: Houston, TX USA
Posts: 117
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Jake - you've made me feel really good about my purchasing a Web Cam instead of anything else. Question that I posted a while back with no definative answer; I have enlarged my inlet valves to 48mm and exhaust to 38mm. This will be on a 1.8 case, 2.0 crank and rods, 96mm 2.0 pistons and 1.8 heads. Did I screw up? I hear you are the 914 motor expert.
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08-08-2001, 08:32 AM
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1975 Porsche 914 2.0L
