gnar-de-gwar
11-22-2005, 07:51 PM
should i go with an underdriven pulley (UR) or lightened (ZPI, or Agency Power)
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View Full Version : to underdrive or not to underdrive.... RTon20s 11-22-2005, 08:38 PM I think the answer is obvious. The power difference between the two will be negligible. However the loss of efficiency in your accessories is a negative only attributed to the under driven pulley. Go with the lightened stock diameter pulley. And if I remember correctly, the Agency Power is the cheapest through Vivid Racing. edxa 11-23-2005, 05:37 AM Go with the lightened pulley. gnar-de-gwar 11-23-2005, 07:54 AM lightened it is! thanks guys...unless anybody has an objecting opinion? killerxromances 11-23-2005, 08:35 AM lightened it is! thanks guys...unless anybody has an objecting opinion? Good call, go with ZPI's pulley. 1.1lbs, lightest pulley out there right now! Good luck! Cya RTon20s 11-23-2005, 04:34 PM Do we know for a fact that the ZPI is the lightest out right now? I have never seen the actual weight for the Agency Power. Not to mention the fact that there is speculation that the ZPI pulley is a repackaged Agency Power pulley. And if that is the case, the Agency Power can be had for less through Vivid Racing. Rocket 11-23-2005, 10:40 PM I have the Unorthodox and I am very happy with it. I used the stock belt and could feel the power increase. Just my 2 cents! TheScionicMan 11-23-2005, 11:19 PM I agree with RTon20s, I can't imagine there is enough difference to justify the potential negatives. As for the lightest, you're talking about 1.1 vs. 1.3 lbs on the Perrin, I believe. You're still shaving off 4... At that point it's probably not even a measurable difference in effect. I'm gonna take the washers off of my bolts to lighten it up even more... hehehe hPower 11-24-2005, 05:57 AM ok, here is some info regarding pulleys..... Less weight = more throttle responce. Underdrive = more power sent to the wheels and less sent to accessories. So theoretically an underdrive pulley will show more HP when set up on a dyno. If you are going for the BEST bang for the buck you should go for an underdrive pulley. If you want the best of both worlds you should look up NST, www.NonStopTuning.com They have an Underdrive crank pulley AS WELL AS an overdrive Alternator pulley. You get the extra HP and your main accessory (the alternator) does not suffer as a result! NST rocks :bow: gnar-de-gwar 11-26-2005, 12:05 AM ^that's hot^ |
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