Underdrive Pulley? Worth it?
01-09-2008, 08:59 PM
#11
2nd Gear Member
Join Date: Aug 2007
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Posts: 150
RE: Underdrive Pulley? Worth it?
ORIGINAL: mustangman02232
it will help a little but if you plan on a blower dont bother
it will help a little but if you plan on a blower dont bother
Blower as in FI ? And if the FI doesnt touch belts why would it matter ? Yeah Im still kindaa noob to the FI stuff.
01-10-2008, 11:09 PM
#13
4th Gear Member
Join Date: Mar 2006
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Posts: 1,138
RE: Underdrive Pulley? Worth it?
They'll make your alternator, air conditioner compressor, power steering pump and water pump operate about 25% slower than their original speeds. If you have an aftermarket stereo system that increases the electrical load you might have a problem with the alternator not being able to keep up (more so at idle speeds).
Worst case scenario is UDP failure. It might not be common but it happens: https://mustangforums.com/m_4435611/tm.htm
Worst case scenario is UDP failure. It might not be common but it happens: https://mustangforums.com/m_4435611/tm.htm
01-14-2008, 04:19 PM
#14
2nd Gear Member
Join Date: Dec 2007
Location:
Posts: 151
RE: Underdrive Pulley? Worth it?
I have used them on two cars. In both instances I have noticed a different. Was it night and day no. However, it was more of a difference is both cases then some mods that cost a lot more.
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