The way we used it was in the pits, just plugged one valve cover and hooked it to the other valve cover, it was the way Ted Flack & John Worley from Chrysler advised use to do. If engine was really bad the float in the meter would bounce when spinning it over on the starter. Difference on a 358 CID modified engine between 2 cfm and 6 cfm was about 60 hp this was engine that made 680 to 690 when everything was perfect. Most times on a 6cfm engine leak down would be in the 5% range with the old style Sun leak down tester. The meter was a Fisher Porter flow meter not some cheap deal like Hamburger use to sell.
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Originally Posted by Chris Hill
Use going down the track or just at idle in the pits. Never thought of it but good idea.
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