If your pushrod is shorter it could get you in trouble
Johnny Mallonee
Wednesday November 11 2009, 1:02 PM
1955 - The Fish Carburetor 1955 Buick Century M-1 as raced by Glenn Fireball Roberts, was one hot car, and the story of Glenn's stolen win on the beach in 1955 is interesting. Supposedly, the NASCAR tech team (Cannonball Baker and Buddy Shuman, I think) came and told Big Bill France that they couldn't find anything wrong with the car. With Carl Kiekhaefer breathing down his neck, France said "Well go and inspect it again until you do." The belatedly discovered infraction was "illegally shortened pushrods," which Red Vogt did to compensate for the .030" thinner head gasket that NASCAR had supposedly approved. Anybody with OHV engine-building experience knows that if you lower one side of the valve train assembly (the rocker pivot point being the center), you have to do the same to the other side. There are a few ways to do this, but shorter pushrods is by far the most reliable, durable and simple way. That's why "under" pushrods are a common aftermarket item for many V-8 engines. There is no performance advantage to be gained by shortened pushrods alone. The advantage was all Tim Flocks.Now you know not to run shorter pushrods in your hotrod------------------------------------memories
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