No More Underdrives!

Philossifer · 07-30-2003, 06:29 AM

Once and for all I got rid of my "March" underdrive pullies on my '89 Mustang LX! They're cool and add a little power but I got real tired of having to avoid stop and go traffic or letting the car idle for a few minutes.

The first thing I noticed is the A/C will now blow 38 degrees at the vents at idle on a 90 degree day. With the underdrives, it would cool to 38 while driving, but as soon as I came to a stop light, the vent temp would start to creep up to 50 degrees or higher!

Second, the temperature gauge runs a little cooler at idle. With the underdrives, (again at idle) the gauge would always creep up a little bit.

Last, (and I don't know why) the idle smoothed out! Maybe I wasn't getting the proper voltage for the computer.... With the underdrives, if I used the blower Fan at idle the meter would read discharge until I started moving again. Now I't always charging even with the fan on high and the headlights on!

IMO, underdrive pullies or good for strip cars but not street driven cars.
Glad I finally dumped 'em!
Phil

07-30-2003, 06:29 AM	#1
Philossifer Registered Member Join Date: Apr 2003 Posts: 69	No More Underdrives! Once and for all I got rid of my "March" underdrive pullies on my '89 Mustang LX! They're cool and add a little power but I got real tired of having to avoid stop and go traffic or letting the car idle for a few minutes. The first thing I noticed is the A/C will now blow 38 degrees at the vents at idle on a 90 degree day. With the underdrives, it would cool to 38 while driving, but as soon as I came to a stop light, the vent temp would start to creep up to 50 degrees or higher! Second, the temperature gauge runs a little cooler at idle. With the underdrives, (again at idle) the gauge would always creep up a little bit. Last, (and I don't know why) the idle smoothed out! Maybe I wasn't getting the proper voltage for the computer.... With the underdrives, if I used the blower Fan at idle the meter would read discharge until I started moving again. Now I't always charging even with the fan on high and the headlights on! IMO, underdrive pullies or good for strip cars but not street driven cars. Glad I finally dumped 'em! Phil

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