Overdrive alternator pulleys from ZZP
07-03-2004, 02:57 PM
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Overdrive alternator pulleys from ZZP
I was giving these a gander while brainstorming:
http://www.zzperformance.com/zzp/pro...ive_pulley.htm
Specifically the 5% overdrive alternator pulley.
Anyone here have information on the cost effective benefits these possibly provide?
http://www.zzperformance.com/zzp/pro...ive_pulley.htm
Specifically the 5% overdrive alternator pulley.
Anyone here have information on the cost effective benefits these possibly provide?
07-04-2004, 10:01 AM
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I've looked at these before, there is a modest performance gain but imo a nice coolness factor with the brushed aluminum. The alternator overdrive will spin quicker giving a greater charge which is good for the big power users but not needed for stock applications.
Still its a cheap mod and would look great with aftermarket sc pulley.
Still its a cheap mod and would look great with aftermarket sc pulley.
07-04-2004, 03:51 PM
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PontiacDad, I'm pretty sure its the other way around: The alternator will spin slower which will free up high rpm power.
The ZZP site claims a 5% overdrive is not enough to cause any problems with other electrical features.
The ZZP site claims a 5% overdrive is not enough to cause any problems with other electrical features.
07-04-2004, 03:56 PM
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Originally Posted by Allmachtige
PontiacDad, I'm pretty sure its the other way around: The alternator will spin slower which will free up high rpm power.
The ZZP site claims a 5% overdrive is not enough to cause any problems with other electrical features.
The ZZP site claims a 5% overdrive is not enough to cause any problems with other electrical features.
By spinning the alternator slower than stock you can free up some of the HP robbed in the upper RPM bands. The 20% underdrive is excellent for the track but not recommended for street use in cars with aftermarket stereos. The 5% overdrive alt pulley works great for cars with large stereos or extra electronics in the vehicle. All 3 of the pulleys are very lightweight and will reduce rotating mass. This is significant because at redline a stock alt pulley is spinning over 17,000 RPM!
07-04-2004, 04:12 PM
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I assume because the Alt on my 93 is the same, it'll work for me? I'm interested in the overdrive pulley, since I have to push some subs around... 
Good idea. I wonder if the DP units use an overdrive pulley.
Good idea. I wonder if the DP units use an overdrive pulley.
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