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cordoba13 04-24-2025 07:44 PM
plus/minus
 
engine build specs, I thought I read in rule about +/- tolerance, cannot seem to find it, say my head c/c calls 88 cc's and measure 87.999 will it pass?? or stroke calls for 3.75 measures 3.75999
gary

fordteacherguy 04-24-2025 08:17 PM
Re: plus/minus
 
Here is a link to the2025 Rule book.https://www.nhraracer.com/Files/Tech...20Rulebook.pdf

Current rules.080 over bore..Valve size tolerance + .005/-.015 Stroke tolerance +/- .015 / connecting rod length +/- .025 no allowances for below chamber CC minimum. Its all there!

cordoba13 04-24-2025 08:53 PM
Re: plus/minus
 
thanks got it


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