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Username Post: Over heating
Frequent Contributor
Posts: 1269

Loc: Tennessee
Reg: 12-06-10
10-31-19 04:09 AM - Post#2779184    
    In response to 4dr 57

Is your vacuum advance full intake vacuum or ported carb vacuum?
What is your initial timing advance?
Both effect idle temps.

Standard equipment pulley sizes:
Single groove crankshaft pulleys are 6 3/4” diameter and water pump pulleys are 7” diameter
Under drive, water pump turns slower than crankshaft
Double groove crankshaft pulleys are 7 3/8” diameter and water pump pulleys are 6 3/8” diameter
Over drive, water pump turns faster than crankshaft

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