Benefits/Disadvantages of ASP Underdrive Pulley
#1
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As the title states, I'm wondering what the benefits and disadvantages are of an Underdrive Pulley for a 99 WS6 M6 with heads, cam, intake, headers, exhaust.
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#13
TECH Apprentice
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if you are talking about pro and cons of just an underdrive pulley in general, then its definetely a cheap mod that you can feel. The only downside affects are if you drive in a lot of stop and go traffic in hotter temps expect your car to run warm to hot. also when coming to an idle at night with the your lights on, they will get dim and then brighten back up when you take back off. also if you have any kind of upgraded stereo system, expect to upgrade alternators too. thats what a pulley does, slows down the accessories.
if these are things you can live with or its not your daily its definetely worth it. i had them on my old mustang and got annoying to me, so thats a few ponies that im willing to leave on the table for my fbody.
if these are things you can live with or its not your daily its definetely worth it. i had them on my old mustang and got annoying to me, so thats a few ponies that im willing to leave on the table for my fbody.
#16
FormerVendor
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It's pretty rare to have charging issues especially if you have a cam in the car and the idle is raised. You might see an issue with a big stereo but that is about it. We have run just about every brand out there and it's very rare to see an issue out of any of them. Typically a solid 8 HP gain to the ground can be expected.
Jon
Jon
#18
TECH Fanatic
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I've been running an ASP (old pre-SFI model) since about the time of my forum join date and put 40k miles on it. Never had a single issue. Have never seen a case of a car running hot at idle due to it. Only heard of voltage drop issues on stock A4 cars due to the low idle, in which case overdriving the alternator will work.
Last edited by NHRATA01; 04-06-2011 at 03:02 PM.
#20
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I do have an aftermarket sound system. 800W Digital Amp, two 12's and a DVD player...
So by the comments above, and given my stereo equipment I should stay away from the pulley?
So by the comments above, and given my stereo equipment I should stay away from the pulley?