Slakkr183

hey i have a question about the mac underdrive pulleys.
I heard that they are not good for your car, and can actually cause mechanical problems, by wearing down the battery and alternator...
anyone else know anything about that?
cuz i did only hear that from one person, but that person is very reliable..

pro tint

the only thing i have heard about pullies being bad is when they replace the dampner, I think that you will be fine with it. but maybe someone with more knowledge could help you out!

koesterca1

The underdrive pullies slow down the speed of the front accessories. This means a slower water pump and alternator. On a good working cooling system the slower water pump is not a problem. But with the stock fox alternator and a few running accessories(ex.headlights,radio,elec. fan,) at idle the alternator might not be able to put out enough juice.Most people will either tell you they arent worth the hassle, or to put them on and just leaveout the underdrive alternator pulley.

samseed101

Even my SN95 with the larger alternator struggled at idle with a few accessories turned on. I ended up having to remove them anyway when I put the s/c on. But on a fox with a smaller alternator, I can see it causing some issues.

chath_brick

i have u/d's on my 95, and i've never had a charge problem. i've tried running it at idle with every accessory on, and it never even hiccupped.

samseed101

Now add a stereo with a subwoofer / amp combo that's 600w (RMS not peak) and see how the system handles it[8D]

1985stang

Who needs that stuff I'd listen to the supercharger.

chath_brick

my right foot controls my radio . honestly i dont even listen to the radio in the 'stang, but i tested it out when i was testing the load on my alt. from my u/d's and it didnt bother it a bit.

7upedition

Upgrade to a 3g alternator if theres a charging problem, skip the pulleys and buya blower!

gearbanger

lol there is a big diffrence between them $$$$... im sure if he had the money he would get the blower...