underdrive pulley

[Woot]

i want to get a aftermarket underdrive accessory pulley for my 08 Rolla, is it worth it? can it cause problems to charging or other stuff?, id appreciate some feedback, thanks.

[johnoh]

was about to ask this same question, so I'll just bump this one instead

[invader]

I've had an ASP 15% underdrive aluminum crankshaft pulley for about 130,000 miles now (150,000 total), and I've had no problems at all with 440 watts of stereo, 120 watts of low beams and 200 watts of high beams. Headlights dim just a tad when letting the rpm's drop below idle when driving off from a stop with rear and front defrosters on. My 6 year old 700 CCA battery still remains well charged... I really like the improvement in response compared to with the original clumsy feeling heavy elastomer damper pulley. RPM's also drop more readily for easier shifts.

With A/C, use with Goodyear Gatorback # 4060730 belt instead of # 4060740.

[johnoh]

Originally Posted by invader

I've had an ASP 15% underdrive aluminum crankshaft pulley for about 130,000 miles now (150,000 total), and I've had no problems at all with 440 watts of stereo, 120 watts of low beams and 200 watts of high beams. Headlights dim just a tad when letting the rpm's drop below idle when driving off from a stop with rear and front defrosters on. My 6 year old 700 CCA battery still remains well charged... I really like the improvement in response compared to with the original clumsy feeling heavy elastomer damper pulley. RPM's also drop more readily for easier shifts.

With A/C, use with Goodyear Gatorback # 4060730 belt instead of # 4060740.

I drive an auto so of course my engine idles at a low rpm in drive. Do you happen to know what your idle is at is lowest? Mine is 625 rpm when at a stop light

[invader]

Mine idles at about 700 rpm... I'll check what it is exactly with my new scanner.