Thread: ZZP Alternator UD pulley...

Zzp sells an alternator voltage booster thingy for cheap

^ that

Isn't the stage 2 booster only really recommend for a track car and not a DD?

I wouldn't underdrive the alt if you are looking for power output from it. Honestly..how much power is gained?

Have you put on an AC bypass pulley, or considering one?

You'll be fine with changing nothing. 90 amps max is fine for an output if you don't have a system.

The PCM is always turning the alt up and down anyways it's not like it's 0 amps and then max 90. It Fluctuates continously.

Idle is really the only problem, it's an under drive and the pulley is spinning slower the alt cannot put as much (in your case 14%) since really it doesn't matter what rpm your at over 2k rpm you really won't notice because it isnt going to yield more power since the alt is Changing duty cycle all the time and rarely would one need serious amperage unless you have huge amperage consumers like a system.

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Keep your a/c lol

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All depends on the condition of the AC system. AC is going to yield you the biggest gains. Reason why I asked about your goals on the UD pullies is when rpm are lower is when you are going to notice the potential for lower power and less cooling. Say you are doing a good amoutn of city driving, AC will be on, fan speed will be maxed, cooling fans on etc etc. Most of us in cooler states don't think the same way, we have a lot fewer days of extreme hot.

I have a buddy that lives in Phoenix and has an electric water pump that he runs in the winter, for summer he swaps back to a stock unit. This is because while the EWP flows plenty for most of us, in AZ he needs the added speed on the highway that the stock pump provides. Now he is modded heavily, but still our motors do generate a good amount of heat which is more problematic in the hot climate states.

AC robs enough power to typically feel it kick on and the IAC will idle the engine up to compensate. No other accessory is noticed like the AC compressor.

True but beside residual drag when off there isn't much loss. When on I totally agree but if he's at the strip or racing someone id like to think he turned it off anyways.

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Guess I have some different ideas/priorities. In my eyes it doesn't make sense to put your cooling and charging systems at X% less for an occasional strip run. Thought the AC idea seemed to have merit for adding back power.