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Farmall & IHC Tractors Discussion Board |
Re: Cylinder Pressure
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Posted by Bama Binder on March 21, 2001 at 08:33:56 from (206.5.110.200):
In Reply to: Cylinder Pressure posted by REA on March 21, 2001 at 08:09:00:
The shop manual should have the pressure specs on the specific engine you have. My Super H has almost exactly 120 PSI across the board and I think the compression ratio was approx the same at about 6.5:1. My cub manual states that 120 PSI is normal for the Cub and it too is 6.5:1. To answer your question, 95 does seem a little low, but there are variables that com into play. Did you put in new pistons? If so were they the same as original. Is the head gasket the same as the original or is it thicker? The rings and valves can be in perfect condition yet you only have 95 PSI due to other things. My guess is you won't notice any real power difference and the lower compression engines actually "lug" better than high compression. Others will no doubt add to this or correct me if I have erred...BB
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