5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Underdrive pully lie

Old 02-16-2009, 07:20 PM
  #11  
limp1969
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Originally Posted by wowvfast
I don't agree with tim...*L*

if you still have the old clutch fan I bet the clutch is wore out.....I would just use the crank pulley as this is where most of the power is from...it's not the pulleys fault we have a low amp alt in these cars...I use one from a f150 with an auto with the full set and no heating up, no electrical issues..
what these pulleys do alot of time is expose a exsisting issues
plus 1 on these
No problems here on mine either. Did water pump and crank pulley only. Car temp is the same.amprage is lower at idle like a old motorcycle , when you idle the lights dim when you rev up they get bright. But the battery is fine. I think if you had a battery that was older it would be a problem, also the cold. It doesnt get below 50 where I live.

I think you have a problem starting that was not noticed until you put the UDP on.
I bet you have a 20% clogged radiator or bad blades on the water pump, or the fan clutch is bad.
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Old 02-16-2009, 07:21 PM
  #12  
camaroeater
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i just put some aluminum UD's on last week, but i only installed the crank and wp pulley. Mine temp gauge BARELY rose at idle. I do have an aluminum radiator and a 180* stat that makes it run cooler though. I won't even attemp to put the alt pulley on till i do a 3g alt uprade.
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Old 03-01-2009, 11:22 PM
  #13  
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at idle with my cam it charges between 6-8volts and with a stereo upgrade my starter went out from having low volts on start-up, my heats never warm due to not having a thermostat and it runs about 160-170 degrees
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