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» Northern California Ford Owners     » Automotive   » General Talk   » Will UD Pulleys Be An Issue When I Smog?

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Author Topic: Will UD Pulleys Be An Issue When I Smog?
fredfifty
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9/2010
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Has anybody failed the visual with UD pulleys (polished, blue, red, etc other than black) when getting a smog check?

gauging if i should find stock ones and change them out.

--------------------
RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL

Posts: 4754 | Registered: Sep 2010  |  :
ALMOST STOCK
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I've had the polished aluminum UD pulleys on my car since 2002 and I've passed smog every time it's been required.
Posts: 94 | From: Prunedale, Calif | Registered: Jun 2010  |  :
Martinna
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A smaller crankshaft pulley reduces your smog pump air flow by spinning your smog pump slower. Smog at idle can be affected. It has less effect at higher engine speeds.
Posts: 949 | From: City | Registered: Oct 2012  |  :
hidnn0s
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No, you will not have an issue with passing smog due to the U.D. Pullies
Posts: 227 | Registered: Nov 2014  |  :
Martinna
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U.D. pullies might slightly lower your smog numbers by reducing load on the engine. Less load causes less emissions if the tune is right.
Posts: 949 | From: City | Registered: Oct 2012  |  :


 
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