And the penalties are???

[Mike Pearson]

[QUOTE=Cbrinson47;636898]

Originally Posted by Mike Pearson

Years back I won class at the gators and went through tear down. One of my intake valves measured .001 under the low limit. The valve was badly tuliped. I was tossed for the event and had to show up at the next event with the head off and have the valve size checked before I could race. I was also placed on 6 mos. tech probation. That infraction was considered minor. FYI I put new valves in the heads for the next race and the car picked up a tenth.


Did you know that the factory tolerance on a micrometer, Dial indicator, or dial caliper is plus or minus .001. I know this because I used to calibrate precision tools for the Dept. of the Navy. They should be checked with "GAGE BLOCKS" a least once a year. Tools being treated to rough treatment as in running all over the U.S. should be certified at least several times a year. Do you really think most tools being used by the NHRA tech. dept. have been certified?

Wesley was the tech guy during that tear down. When he found the valve just under the low limit he told me if I could find another caliper that measured the valve one thousanth bigger he would pass it. We checked the valve with 3 different calipers and they all measured the same. After I got home and fixed the heads I got to thinking I should have heated the valve to the temperature that it gets to when the engine is running and it might have grown .001 and passed.