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1. Re: Compression Ratio Calculation (score: 1): Author: Bullwinkle <yd3@nvc.net>; Date: Wed, 06 Sep 2000 15:39:59 -0700; If you can accurately measure the head thickness with it still on the engine, then perhaps this will help. Blake Head thickness chamber ratio inches size 1 1/4 litre 1 1/2 litre 3.022 200cc 7.25 8.3; /html/mg-t/2000-09/msg00023.html (6,904 bytes)
2. Re: Compression Ratio Calculation (score: 1): Author: "lbprince" <lbprince@email.msn.com>; Date: Thu, 7 Sep 2000 17:31:18 -0700; Your table on compression ratio vs head thickness should be helpful. Much of this information appears in the MG Special Tuning handbook. My copy of this booklet was issued in 1954. I was able to spo; /html/mg-t/2000-09/msg00025.html (8,229 bytes)
3. Compression Ratio Calculation (score: 1): Author: Bill Loubiere <loubiere@earthlink.net>; Date: Thu, 31 Aug 2000 11:01:09 -0500; Is there a calculation which you can use the compression test data to calculate the compression ratio on your car? I suspect that many things has happened to my MGTD before I purchased it this year.; /html/mg-t/2000-08/msg00184.html (6,926 bytes)
4. Re: Compression Ratio Calculation (score: 1): Author: Dick Dell <rddell@mindspring.com>; Date: Thu, 31 Aug 2000 13:04:39 -0400; Bill Theoretically, you can calculate the actual compression ratio by simply taking a compression test reading with a basic compression tester. Atmospheric pressure at sea level is about 14.7 lbs/sq; /html/mg-t/2000-08/msg00185.html (8,055 bytes)
5. Re: Compression Ratio Calculation (score: 1): Author: Bill Schooler <schooler@erols.com>; Date: Thu, 31 Aug 2000 16:22:21 -0400; You're forgetting one critical variable - valve duration. On the stock MGB, the intake valve doesn't close until 56 degrees after bottom dead center, while on the compression stroke. Therefore, whil; /html/mg-t/2000-08/msg00188.html (8,959 bytes)
6. Re: Compression Ratio Calculation (score: 1): Author: "lbprince" <lbprince@email.msn.com>; Date: Thu, 31 Aug 2000 21:13:32 -0700; I believe your technique for calculating compression ratio is a bit inaccurate. When my TF engine (XPEG) was torn down, the head volume, compressed gasket volume and other volumes were carefully mea; /html/mg-t/2000-08/msg00189.html (9,750 bytes)

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