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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 03-02-2012, 05:20 PM
Thetolleyman Thetolleyman is offline
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Default Anyone using under drive crank pulley?

Thinking of picking up one.
Wondered what you guys thought. Any real downside. Do the lights dim at idle?
Power steering feel any different at idle?
How about water pump, I suppose a slower one might cause an over heat in very hot weather slow moving traffic?
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Old 03-03-2012, 09:14 AM
04SCRAM 04SCRAM is offline
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I'd like to know this as well. I have a friend that has one on his '99 ram 5.2 and at idle it while running his headlights they get dim as well as his A/C doesn't get as cold, of course he is still running the clutch fan off the water pump.
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Old 03-07-2012, 01:40 PM
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snrusnak snrusnak is offline
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Most people don't report any issues. Usually if there is an issue it is electrical and due to aftermarket electrical parts (like radio systems, etc...). They make overdrive alternator pulleys for this. I never heard anyone complain of AC or cooling issues.
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