Quote [Its my similar contention that if compression rises, it takes a higher voltage to arc jump current across the gap. Extreme high compression racing engines use HV coils that have the capacity to rise to higher firing voltages as necessary to fire the plugs. John T ]
John T ,I liked to do that "quenching" of the spark,on a multitude of spark plugs, both aero and auto, using the Champion Spark Plug tester and a large compressor.
Some plugs would quench at a relatively low pressure whilst others would still be sparking with the pressure way up.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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