If you use a throttle cable this is a simple and easy way to slow your car down by not having the carb open all the way.You still floor the gas pedal but the carb only opens part way. You adjust it by changing the the location of the throttle position holes in the little spacer. I used a little piece of aluminum and drilled some holes to make the spacer....more holes the slower the car.Good luck

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Last edited by hankcrank; 04/08/12 01:39 PM.