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Cbrinson47 · 03-18-2021, 09:28 AM

[QUOTE=Mike Pearson;636745]

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?

03-18-2021, 09:28 AM	#39
Cbrinson47 Junior Member Join Date: Oct 2020 Posts: 82 Likes: 541 Liked 56 Times in 33 Posts	Re: And the penalties are??? [QUOTE=Mike Pearson;636745] 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? Last edited by Cbrinson47; 03-18-2021 at 09:39 AM.