NHRA Disqualifies Two Competitors during the Chevrolet Perfo

[Jason]

Originally Posted by Wayne Kerr

I have it from a good source that the supercharger pulley was larger than the specification.

There is no plus or minus tolerance on the pulley spec's. unlike crank stroke.

The rule needs to be clarified before a competitor gets pitched. Not a good call by the NHRA.

See you at the races,
Wayne Kerr

Your good source should have told you that the pulley was from a different year Ford supercharger. Thousandths of an inch had nothing to do with the DQ. Using a different OEM Ford pulley from another year is what got the racer tossed.