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Author
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Topic: Will UD Pulleys Be An Issue When I Smog?
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fredfifty
Since
9/2010
Member # 10320
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posted
 
 
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.
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RIP EDSON VELORO
IM A NOOB, EXCUSE ME. THANKS.
92 LX Coupe 5.0 CARB'd BOLT-ONS SMOG LEGAL
62 Rag Impala
Posts: 4953 | Registered: Sep 2010
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ALMOST STOCK
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Member # 10085
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posted
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: Cameron Park, Calif | Registered: Jun 2010
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Martinna
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Member # 12493
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posted
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: 1093 | From: City | Registered: Oct 2012
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hidnn0s
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Member # 13845
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posted
No, you will not have an issue with passing smog due to the U.D. Pullies
Posts: 239 | Registered: Nov 2014
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Martinna
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Member # 12493
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posted
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: 1093 | From: City | Registered: Oct 2012
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