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Pulley Dimensions?

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Old 12-16-2004, 01:54 PM
Whaler Whaler is offline
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Question Pulley Dimensions?

What are the dimensions of the upper and lower blower pulleys on an 02' Lightning and do you measure them from the outside edge of the pulley. I just bought this truck used and the boost is 10 lbs. I thought that 8 lbs. was the max. The truck appears to be stock.
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Old 12-16-2004, 05:09 PM
Silver Streak Silver Streak is offline
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The stock gauge isn't very accurate and the boost you get will vary a lot depending on weather conditions.
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Old 12-17-2004, 06:00 AM
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The stock crank pulley is 7.5 inches and the stock blower pulley is 2.93 inches. As mentioned the factory boost gauge is not very accurate.
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Old 12-17-2004, 08:55 AM
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Do I measure outside edge or from the grooves of the pulley?
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Old 12-17-2004, 01:55 PM
nthe10s nthe10s is offline
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From the outside edge - the lower is 7 7/8" , the upper is 3 1/4. The lower is most commonly changed. And yes the factory boost gauge often reads to 10lbs.
Hope this helps.
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