Brytl217

Hey Guys, I am planning to do a system in the spring that consists of 2 10"s with an amp to push it along with an amp for the components; nothing too big. However I also was looking into putting in the UR Crank Pulley. I did a search but found out that most people here don't really have a system with the crank and those who have a system are in the same boat as I am in. So my question is by having a system, is the Crank Pulley really worth getting, would I really even "feel" the difference with the system? Input would be greatly appreciated. Thanks in advance.

blumpkin

I did a google search on UR crank pulley and didn't get much. Then I did a search for crank pulley, and they're just lighter pulleys which will may give a slight performance gain. They also have them for acura supercharged applications -- is that ur case? I didn't really understand the "boat" ur in. Anyways, I've learned that the pulley will give you a boost in voltage, but to my understanding it is very minimal-- and to me seems pointless. If you really need power u need a new / rebuilt alternator. How much power do you plan on running to these 2 10's, u said nothing too big, so i'm actually questioning ur desired use of the pulley. If ur running 2 10's and then some components u should be fine w/ the stock alt. Getting an optima battery would be useful too.
I'm running 4 12's on an Xtant 1001x amp (power regulated), and a nakamichi 200 watt amp and don't seem to have a problem. However if ur yearning for more volts, you can do a few minor upgrades called "the big 3" that will lower the restriction of power flow. Do a search on www.carsound.com (forum section) and i think there may even be a sticky on this. I did one part of the big 3 (neg. batt terminal to body) and since i've done that I've had no more dimming on the headlights. I am planning to finish the other 2 parts of this to get an even greater boost. I'm not having much of a problem though because of the way my subs are wired (which does not lower impendance). However I'm planning on changing that so that the Xtant will be runnin at 1 ohm and i can REALLY blow my fuckin ears out?

Brytl217

thanks man for the input, well the "boat" i was speaking about was that by having the UR Crank with a system will I start to see the dome lights dime? Like am i drawing to much watts that the crank pulley can't support? and another question is by having a system as I described will I be able to feel any performance gain?

big mike 13

they have a 12Volt charger UR pulley for people with systems with 600 watts or more..
i actually just ordered one. Excelerate on this board is sellign them for $240

blumpkin

funk that, $240 bucks for what, does it give u any significant increase in voltage?

do the big 3 first... less expensive and i'm damn sure it'll work-- shit a tiny lil jobbie on mine did wonders

ou sig

The regular UR crank pulley underdrives your alternator so it wont put out stock levels. At stock levels the TL's alternator puts out about 120 amps. So you go adding a big ass stereo and your other stock electrical components, you alternator may not keep up.

"The big 3" are very good points and worthwhile, but when your alternator cant produce enough juice to begin with...it doesnt matter what you do.

You spend about $60 more and get the UR 12 Volt charger series and know that your alternator is still spinning at stock levels and you are still getting 85% of the power gains from the lightend crank pulley.

I would get that for sure if you plan on going above 1000 watts and want a new crank pulley. I have slightly over 1100 watts RMS, and the stock electrical system charges fine - with every accessory on also, but I dont believe it would keep up with the underdrive crank pulley.

musicbox

UR is Unorthodox Racing, just FYI for people reading this thread and wondering.

http://www.unorthodoxracing.com/

phipark

This is the concern that is in question.

elduderino

"Capacitors are a smart addition as they store the power the amplifiers need for peak draw. Our stock diameter series used with capacitors allow the vehicle owner to achieve the cleanest and most powerful sound with no loss in voltage output. Another good option would be to install a second battery or batteries just for the stereo."

First off, capacitors are a point of contention among audio experts - this guy isn't that knowledgeable. If you have fully-regulated amplifiers, such as the JL "slash" series, caps don't help them. And caps don't bring up the constant voltage - they bring up the voltage during sag transients, which is the part that has the arguable effect.

And it's NEVER a good option to add a second battery for a stereo. You take a big weight hit, which is a silly thing to do when adding a performance product. Also, doesn't matter how many batteries you have if you don't have enough amps.

ou sig

true, ideal situation is to get a beefed up alternator then everything would be just fine, but that requires lots of money, and its hard to find a reputable rebuilder...not to mention you wont have a car for a while

phipark

So the UR 12 Volt has the same benefits as the Ultra SS crank pulley, but without the stereo concern?

big mike 13

teh crank pulley is for perfomance gains, not Audio gains...

ou sig

check out the UR website for all the info. they talk about all that. but if you dont feel like it I will summarize....The SS pulley gets 85% of the gains from its light weight compared to stock and the other 15% from underdriving. So the 12 volt pulley (stock size but light like the SS) will give you 85% of the gains.

So you are basically getting the same HP and torque increases, while still running your alternator and power steering pump at stock levels.

phipark

Thanks, I would have read it myself, I swear. Looks like I need to go with the 12 volt pulley.

ou sig

That would be your best bet, how much power will you have?

phipark

well, by the printed manufacturer's power, I'm running 900 watts (75x4 and 600x1).

ou sig

hmmm, you may get away with the underdrive pulley if you get a good battery. but if you ever want to play it loud and use your accessories...I would get the regular size. Cause my amp is rated at 600.1, but according to the "birth card" it puts out 738 watts into 2 ohm mono - what I am running it at. so Im sure yours will be similar to that

phipark

I do have a Yellow Top. Looks like it might be cutting it close and probably not worth the extra 15% power from the underdrive.

ou sig

exactly - 15% = 1 or maybe 2 hp...nothing