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johnjzjz · 09-13-2007, 07:37 AM

a 70 - 396 is a 402 = 030 396 - and iron headed motors were 9 1/2 for the most part - if the cam has short duration or is advanced more than spec then the compression #s ( static ) will be high - also if you started on the drivers side the starter was cold and the battery was at top by the time you switched sides the #s always fall off - most crank the motor till the # is at its highest - race cars use the 3 pump method - at 3 hits on the Gage you stop and go on to the next one - overall it looks as if the cylinder pressure is real good -- had you gone back and re done # 1 my guess its the start point it would not have been 200 -- its the difference between them not the top # that matters -- jz

09-13-2007, 07:37 AM	#2
johnjzjz . Join Date: Feb 2006 Posts: 1,385 iTrader: (0)	a 70 - 396 is a 402 = 030 396 - and iron headed motors were 9 1/2 for the most part - if the cam has short duration or is advanced more than spec then the compression #s ( static ) will be high - also if you started on the drivers side the starter was cold and the battery was at top by the time you switched sides the #s always fall off - most crank the motor till the # is at its highest - race cars use the 3 pump method - at 3 hits on the Gage you stop and go on to the next one - overall it looks as if the cylinder pressure is real good -- had you gone back and re done # 1 my guess its the start point it would not have been 200 -- its the difference between them not the top # that matters -- jz Last edited by johnjzjz; 09-13-2007 at 07:39 AM.