As the title states, I'm thinking of purchasing a underdrive pulley, but am worried that it may not have enough out put for my 2 amp system(800 rms), plus all the other gadgets I plan on purchasing( Blose, PS2, Monitor, and a coulpe of extras). I read somewhere that the output of the alternator decreases. Does anyone have a similar or better setup that could advise me of any pitfalls I may encounter.

 

doo a google search someoen in canada did a thing on that ,it dident decreas much of hte power, maby get a bigger better battery tho?

 

Capacitors and a bigger battery will help, should more than take care of it. Some UDP's take away alot of power, but I've read that the Max's don't hurt the output as much as some other cars. Doesn't someone just make lightweight ones that keep the same diameter for the pulley? that way you'd still gain some without losing any alt. output.

 

unorthodox is a good company.. they have a few different types but i think the S type is the one the majority of the people on the org have.. and as well what HM and Redfox said

 

Tried Google, but didnot get appropriate hits, I'll keep tryying. I already have a yellow top & 1 farad cap. My biggest question is with all the other accesories I want to add will I have to worry about severe battery drain, low lights, etc.

 

May go without saying, but you upgraded the big 3 already, right?

 

A 1 farad cap, geez, that thing could power 10k watts easily without battery drain. Hook your monitors/PS2 up to the cap, there is plenty of power there. Anything else should be fine on either the alt or the battery.

 

I second what z0dE said, there's not a whole lot to be worried about, you've got everything covered. Battery drain occurs when there's TONS of underdrive. Pulley kits for 5.0L mustangs are notorious for it. Trying to get the most power out of them, they just underdrove it way too much. I wouldn't be concerned with the Unorthodox though, if you have any doubts, try getting ahold of a sales rep, I'm sure they've got more information about how much it actually underdrives and what kind of reduction in alt. output you'll have with their pulley.

 

I'm not sure, I've done some mods. But please enlighten me !

 

If you have a yellow top and a cap, then don't worry about it. It'll have plenty of power for the amps. I am using an 800 watt amp and a 4 ch amp without a cap or a good battery. I don't use udp, but if my car can handle the power without anything, then yours can def handle it.

 

Just so I understand this, you are going to get a pulley that will give you (let's just say) 1-3hp and you have 40-75lbs of audio equipment in the car (or going in the car)? Seems like polar opposites.

BTW UR makes a stock diameter pulley (that is lighter). I bought my pulley from a member who switched to that for audio needs.

 

I have a little over 100 lbs of audio equip in my trunk, but somehow I got 3 mpg better this week than I did before I had the stuff in.

 

[QUOTE=Fr33way]Just so I understand this, you are going to get a pulley that will give you (let's just say) 1-3hp and you have 40-75lbs of audio equipment in the car (or going in the car)? Seems like polar opposites.

In theory I see your point, but THe audio thing is a phase that has lasted for about 10 years now, and is on its way out with me. Now more so I'm into better high-end audio equip that doesnot need BIG boxes and amps, but will still draw amperage.

 

who has the best price for unorthodox or motostorm? Couldnt find anything less than $180.

 

No.
The capacitor is only a buffer to help iron out fluctuations in voltage to, say, a sub amp caused by the high and varying current demand.
As an example of the math, (stop reading here if you don't want the tech stuff) the time constant of a capacitor is 0.7CR where C is the value in Farads and R is the resistance of the load in ohms, and T is in seconds.
First we have to know the value of the resistance, given by 144/P where P is the power in watts, or roughly half an ohm for a 200W sub.
So T=0.35 seconds for a 1F capacitor.

 

Huhh?!?!?!

 

Why are you giving us technical aspects of a capacitor? All descriptions I have ever seen for a cap always say that it stores up power to be used when the amp most needs it. So, in his case the cap will provide plenty of power to the amp and sub especially witht the yellow top bat.

 

What Clive is saying is exactly that. It stores enough energy to run your system for a 1/3 of a second.

The capacitor doesn't generate electricity, only the alternator does that. What I've read of the UDP is that it looses most amps at idle so as long as you send most of your time on the freeway you'll be OK. If you're sitting in the parking lot or cruising while cranking out tunes, chances are your battery will go flat.

BTW, I don't think a lighter pulley will make any difference. Its the smaller diameter of the pulley on the alternator that makes it spin slower which takes less HP from the engine (and generates less juice.)