Definitely not wanting an underdrive pulley but am looking for a lightened pulley instead. Any ideas?

All the pulleys I have seen for sale all say 'Underdrive'...Darrick and myself are both trying to avoid that due to our systems.

Thanks for any help...
-Jeff

 

It's already been made. Talk to Gabe aka latinmax to find out details or search

 

lol...of all the Maxima owners that could have answered it was someone else in DNE.

Thanks Joffe...I'll call Gabe. Steve also mentioned that UR Pulleys makes a lightened pulley and an underdrive pulley.

-Jeff

 

Yeah Jeff. Unorthodox does make one. But Unorthodox has always been a little steep.


No underdrive? Pansies!

 

Why is only DNE posting here?

 

Cause few people know about it. Gabe was the only one that knew when I was inquiring.

 

This would be something important for A LOT of Maxima owners to get in on...mainly the ones with systems.

Is the idea really 'new' to everyone else?

 

UR is the only one I've ever known to make a lightened pully that was the same size as stock.

 

Not so much "new" as "low demand."

 

It has ben around for a while, its just no one has it because the gains are probubly less. Not sure but if the price wasn't so steep i'd buy one.

 

mabe we can get a group deal?

 

screw a lightweight pulley, i want a lightweight OVERdrive pulley. i need some more amps.

 

Is the lightweight pulley as strong as the stock one?

 

What is the advantage of replacing this pulley with aftermarket?

 

The concept is similar to using lighter wheels on your car. Frees up some horsepower, that is otherwised lost in the rotation of a heavy pulley. An underdrive pulley reallocated the power even more (about 10-15%), but the tradeoff is less electrical power to the alternator and A/C systems

 

y don't you guys get an underdrive pulley and put a new pulley on your alternator. I seen it at ABT on of these days. That thing was pricy but I'm sure that are some for cheap.

 

technically, if you kepts the same pulley ratio (and got the same ammount of juice) wouldnt the whole system create as much drag as before? the light pulleys would help, but im talking about size

 

...Uh, what about the ones with SuperChargers???

 

Does anybody have any dynos of these things? I don't see how they could produce any power at all. Most of the drag fighting the pulley comes from the belt and accessories that it must be turning, right? If it's the same circumference, then weight would only have an effect on initial inertia. So maybe you could rev a slight bit faster. But it's not going to be like a lighter car versus a heavier one, because with cars, the power is fighting 100% with the car's weight to propel it, so lightening your car directly lightens the workload for the engine. But with a pulley, the workload is not caused by the weight of the pulley, but by the accessories, right?

 

very interested in this

 

How does a underdrive pulley affect the AC System. I wouldn't think that the AC system takes many amps to run. I would think that it would affect the compressor and not the electricals of the AC system. Am I right on this? Is the AC just less cool at low rpms?

 

The single underdrive pulley slows down the RPMs of ALL the accessories---power steering pump, A/C compressor, and alternator. There WILL be decreased output out of all 3 with an underdrive pulley. If you have the stock audio system and are content with that, then an underdrive will most likely do you fine with minimal to no noticable depreciation in functionality.

If you have aftermarket audio amps or anything using above factory level power (any aftermarket electronics) you would be best served by the OEM size pulley.

The power gains are more from the weight savings vs the underdrive. I think this saves about 6 pounds on the crank. Honestly, I would expect about 3-4 whp outta this. It was noticable on mine, but not huge.

 

how much worse is it to have asystemwith a underdrive pulley, i have a 1000watt amp wit a L7 12, will be afected noticably? cause i dout the stock size pulleys give any HP.

 

It's your battery, amplifier, and alternator you'd be abusing. If it's in your budget to replace them often then by all means.......I used to be an audio and security installer, and amps generally don't like voltage drop. Then there's the fact that if you are using more current than you are producing then you will eventually run your battery down while driving.

Opinions vary, but generally 85-90% of the power gains are from the weight savings alone. Is your electrical equipment worth <1 hp to you?

Side note: I initally had an underdrive on my car (bought cheap just to test.) At idle I was at 12.6 with nothing on. If I turned on either the A/C OR the stereo system it dropped below 12v at idle. I'm not trashing my amps for <1hp.

 

Is this English??

 

Thanks for clearing it up, so a reguler pulley is outa the question but why doesn't any one have a sock size light weight one??

 

Anyone with a big system ever put in a udp? I just want to hear from soemone who has tried it.

 

That's what t56gen3 is saying. He ended up getting a stock size lightened one so he would still get the slight gains, but not affect his power output.

 

sounds like what I need. Can we get a group deal?

 

group deal sounds good.

 

I have sent an email to a company that makes lightweight pulleys for WRXs and SRT-4s to see if they would be interested...I'm just waiting on a reply now.

BTW...I found a good article on Motorvate about Underdrive Pulleys.
Underdrive Pulley Report...<---Click

 

The stock pulley weighs ~5lbs and is a crank damper. The UR UDP weighs ~1.5lbs and has no crank dampening materials.


Dave

 

What is a crank damper?

 

concerning the system issue. I understand hwo it would affect the dorp in voltage, but what if you had an optima yellwo top and a capacitor? And you don't use your A/C too often? Will it sitll be OK? I'm looking at around 1200-1500 watts here, I have a friend with a 5th gen and he has 1500 watts running with the stock battery and a cap. All he gets is dimming, he has the DMS UDP, and he gets slight dimming, but he always has had that. =P

 

hrm... D1n, I have 2 1200 watt amps (JBL) and a 300 watt 4 channel amp (JL Audio).... ran by 0 guage to a distro split off into three 4 guage wires ran to the amps.. I have a yellow top and a capacitor. Any of you guys think I will be able to get some pulleys to free up some HP without compromising my sound system? I use the AC a little bit during the summer, Houston, It hot.. Plz help!!

 

you're in the same position I'm in =/ The only problem is I already bought the pulley for a good price, but now I'm considering actually putting it on or not.

 

can we do a alternator upgrade???

 

im sure we can, but i was told that our 4th gen maximas have better output than 5th geners...110 amps something like that..i dunno how much mroe we woul dbe able to upgrade and for hwo much

 

It's a ring of elastic material (rubber) sandwiched into the pulley which dampens the natural harmonic vibrations of the crank under various loads.


Dave

 

so whats our options? keep stock pulleys?