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triing to decide about a pulley

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Old Dec 22, 2004 | 01:24 AM
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From: dudley mass
Default triing to decide about a pulley

should i get an uderdrive pulley or not. i have a big stereo which draws lots of power. also am concerned about idle quality. i dont want my interior lights dimming at every light.what do you guys think?
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Old Dec 22, 2004 | 01:40 AM
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With a 6speed, you will be ok with just the underdrive pulley. If you really think you will have problems, then you can always get the alternator overdrive pulley to compensate.
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Old Dec 22, 2004 | 01:42 AM
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go for it man.
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Old Dec 22, 2004 | 01:47 AM
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Originally Posted by Tim @ EADPerformance
With a 6speed, you will be ok with just the underdrive pulley. If you really think you will have problems, then you can always get the alternator overdrive pulley to compensate.
beat me too.

beside pdd, you'll need the pulley if you want to hit that 500rwhp mark.
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Old Dec 22, 2004 | 01:48 AM
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Your worried about idle quality even after all the mods you have, I think you have probably been through a variety of idle issues. Anyway it shouldnt hurt idle at all, it only slows down your accessories, no tune necessary. Only get the crank underdrive not the alternator. If you are really worried about lights dimming and always want a big charge do what I did get a Optima Yellow top battery and V-Plus Volt Booster. I can run every feature in my car and the needle barely even moves and the lights never dim on anything. The V-Plus Volt Booster will make your alternator put out 2.2 more volts at 70% throttle I believe and give more power to your ignition system, fuel pump, basically anything that is drawing power on WOT blast. Yes it really does work Im glad I bought it.
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Old Dec 22, 2004 | 01:51 AM
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whats the alternator pulley do? keep the regular speed of the alt ? just dont want my idle to suffer
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Old Dec 22, 2004 | 02:41 AM
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Basically, by making the crank pulley smaller and lighter, it makes the rest of the accessories turn slower. If you want to make sure your lights don't dim at idle, I'd look at an alt. overdrive pulley.

It's the same concept the '03 Cobra guys use on their factory superchargers - smaller pulley = more RPM's = more horsepower.
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Old Dec 22, 2004 | 04:15 PM
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do it man just use the stock alt pulley....i got 2 12" Fosgate HX2's with a healthy fosgate amp its fine unless im trying to make some ricers stereo look stupid then my battery gage sits on 12 volts at that point but normal driving around is not bad
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