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Jeff Chambers · 03-30-2006, 09:32 PM

This is because there is actually a dwell at TDC. You need to check for TDC at some distance before and after TDC....say .050 before and .050 after (coming back at it). Then split the difference and you'll really know where TDC is. Otherwise, you can any where from 3 to 8 degrees of dwell at TDC depending on tolerances, clearances, etc.

03-30-2006, 09:32 PM	#16
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: zero decking the block This is because there is actually a dwell at TDC. You need to check for TDC at some distance before and after TDC....say .050 before and .050 after (coming back at it). Then split the difference and you'll really know where TDC is. Otherwise, you can any where from 3 to 8 degrees of dwell at TDC depending on tolerances, clearances, etc. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"