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How To Measure Supercharger Pulley?

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Old 04-13-2010, 11:16 AM   #1
Optimus485
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Default How To Measure Supercharger Pulley?

I just bought a 2003 Cobra, the previous owner handed me a dyno sheet and all the mods that were done to the car. It says it has the 2.8 pulley, but when I went out to measure the supercharger pulley the overall DIA from end to end is 3.1. The dyno sheet says it's making 13.2psi of boost.

What is the correct way to make sure it's the 2.8 pulley?
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Old 04-13-2010, 05:31 PM   #2
dirtydave289
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13# sounds like a 3.1..and you measured it so I think the modlist is wrong
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Old 04-13-2010, 09:39 PM   #3
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Do you measure the overall DIA or actually inside the grooves?
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Old 05-30-2014, 11:28 AM   #4
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If you measured the total diameter of the pulley at 3.1 then it is probably 2.8. You should measure the diameter at the ribs.
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Old 05-30-2014, 11:29 AM   #5
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Quote:
Originally Posted by HBMckelvey View Post
If you measured the total diameter of the pulley at 3.1 then it is probably 2.8. You should measure the diameter at the ribs.
When I say ribs, I mean the pulley grooves !!
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