D&D Instruments

1) Determine Tangs/Tips*

.104”Sq, .124”Sq, .156”Rnd,

.187”Rnd, or .203”Rnd

2) Determine Configuration

Straight Thru, Off-set, or 90°

3) Determine Ratio

(Actual Speed) / (Indicated Speed) = Ratio

Use GPS or our Dyno Speed Check - $60