I saw many people have the UR underdrive crank pulley installed. And I heard it has some effects on power steering and/or alternator. Does anyone have more info on this, pros and cons? or it has to go with the UR alternator pulley and power steering pulley to make everything works right?

 

it'll be fine as long as you dont have a big sound system.

 

i have had the crank pulley for about 30k miles no issues. anyone know the weight difference between the UR alt pulley and oem atl pulley?

 

i think you shed about close to 15-20 lbs with the UR crank Pulley. I remember when I had my UR crank installed and when the installer handed me the OEM crank pulley, I almost dropped it because I didn't expect it to be so heavy.

 

i'll weigh my OEM pulley when i get home, and i have the weight of the UR pulley written down. it will be close to 10-15lbs as BraveDemon said.

i have Version 1 of the UR UltraSc pulley, which means i have stock diameter alternator/air & water pump, but my power steering is actually underdrived. i have had NO issues whatsoever with underdriving the p/s. it will not put you below minimum fluid flow required to safely operate the system.

my only concern, which may be unfounded, is that long ago i had been told that your a/c system may not run as efficiently since it's spinning slower, but i've never seen anyone on here complain about it.

 

hey satinsilver havent seen u around in a while. can u weigh the alt pulley too i just bought one i jus want to see the weight diff

 

hey S1CK, what's goin on? i actually didn't buy a full set, just the crank pulley. do you plan on swapping yours out soon?

 

had similar experience lol. I got my UR pulley put in last month and Im loving it.

 

wat does swappin this pully do? :S noob alert

 

creates more hp and torque

 

actually it doesnt create more HP-
by reducing the rotating mass from 8 or 11 pounds down to under 2 (its shipping weight with box) and slowing the AC compressor slightly (mass drag creator)- you free up about
8-10 HP that was trapped in the engine waiting for you to find!
The other pulleys can stay stock and be fine with the underdrive
The alternator is a non issue since most with the UR pull plenty of revs
The Battery needs to be heavy duty if running OVER 600 AMPS stereo- thats just too much drain, then you should just go with light standard sized pulley and an Optima battery

 

www.unorthodoxracing.com for full tech info and actual weights

 

i already have the crank i jus bought the alt pulley

 

Unorthodox Racing offers 2 types of crank pulleys: stock size and underdrive. The underdrive pulley will slightly underdrive the alternator and P/S. However unless you have a 600 watt RMS stereo or a supercharger you won't notice a difference.

The stock OEM pulley is about 8-9 lbs and the UR pulley is about 1 lb.

 

hmm, i figured it was heavier than that. i guess it's just the illusion of being heavier since you don't expect it to be.

i don't know how i lucked out to get the original ultra Sc, but yeah, the revisions since mine don't underdrive the power steering pump anymore. man was that a surprise when i went to put the belt on.

 

so having the stock size pulley or the underdrive one will have the same outcome?

 

you will free up more power with the underdrive crank pulley but i didn't want to underdrive my alternator because i have a 700w RMS amp for my sub not including my stereo which is around 60 or 70w RMS and i also didn't want to underdrive my a/c since i wasn't sure if it would change my efficiency, although that may just be paranoia on my part.

 

wait so if u have the underdrive and a 600watt RMS or higher system what could possibly happen?

 

You will underdrive the alternator and maybe cause the battery to go dead if you sat in a parking lot for 20 mins with your system going. It's not the end of the world but that is why you should get the stock size crank pulley so you don't underdrive the system at all.

 

One reason so many like the Optima deep cycle RV/Boat battery- they have so much reserve you can watch videos and crank the stereo all you want in the parking lot

 

====================

The UR stock size pulley also gives u more HP like the underdrive one?

 

It gives more power over stock because its lighter but the underdrive ones give you more.

 

where can I get underdrive pooley and how much do they usually run?

 

ask Excelerate he's a great seller from what all people saying

 

8-10 hp, damn that's good stuff. that's like intake header and exhaust on our cars.
how is the installation of the pulleys? professional recomended or is it like installing headers etc.

 

i had alot of trouble getting a professional to install it since there is no way to really hold the new pulley from rotating while you tighten the crankshaft bolt. honestly it's not that hard to install it, even if you've never done it before.

i was able to devise a holding device for the new pulley, but what's the recommended way?? someone on the techline from UR told me to "open the access plate in the transmission, yadda yadda..." but personally i don't see this as a viable option for us.

too bad they don't machine the pulleys to accept the bolt removal tool.

 

how long did the installation take?

 

it took me about 1.25 hours total, which included futsin' around for a breaker bar to loosen the bolt with and a trip down the road to get a power steering belt because the one i had was the incorrect one and the time it took me to figure out how to hold the new pulley still while i tightened it to spec.

if you have the right tools, and the right belts on hand then one person should be able to do it much quicker. i had to change my power steering belt about 3 weeks ago and didn't think to use the tensioner bolt on the pump so i actually took the pulley off to do it. it only took about 20 or so minutes total to jack the car up, remove the tire, pull the fuel pump fuse, get the accessory belt off and pull crank pulley off.

personally, i was nervous to replace the pulley myself in the beginning, but once i did it i realized just how easy it really was, even compared to putting in springs or manifold spacers.

 

satin silver I just got a UR pully was the crank bolt reverse thread or normal?

 

hey satin do u kno how hard it is to install the alternator pulley

 

stheman - the bolt is a normal, righty-tighty bolt. the engine also spins clockwise, so just use the old ratchet on the subframe trick to break the bolt free.

hey S1CK - i've actually never done it but i do remember looking at the instructions off the comptech site for putting the new alternator pulley on for the supercharger belt. it doesn't look anymore difficult than doing the crank pulley, but you may just have to put some muscle into it to break it free.

according to the install instructions you just need 2 wrenches (a 22mm & 10mm). it does say "an impact gun may be needed" but you can probably do it with a long wratchet for some more torque on the 10mm bolt. make sure you spray alot of PB blaster in it first.

 

hmmm..... I'm going to get the UR crank pulley and find a mechanic to do it for me. :P

 

Should have taken their advise. There are 2 small 10mm bolts to remove and you could have gained access to the flex plate and should have been able to hold it with that.

 

hmm, maybe you can educate me on this because the guy from UR didn't know the model specifics about our tranny and i didn't find anything about it when i did a search here on the forum. thankfully what i did worked out well, but i would prefer to use a better method.

thanks in advance.

 

i had a very difficult time getting mechanic that would do it, and once i did he put the old pulley back on after he called me in the middle and i told him he would have to open an access plate to keep the pulley from moving. i think most people just don't want to accept responsibility for the work on something like that. i dunno.

 

The real tool for the job has a flat- prybar like tip that you stick in the flywheel teeth- inside the access port
Nothing turns and you use the torque plus degrees method or the full torque method or the blast it with the air gun as tight as it will go-
this writer not liable for your choices in life~
check it out- easier to see than describe removal end
http://heeltoeauto.com/Moroso-Crank-...s-pr-2452.html

If you have several friends buying UR- it would make sense to have one of these and make job simple for everyone,- then post it in private sales for the next group!

 

01tl4tl - thanks for the tip. i have one of the honda pulley holders, but not that one in particular. just jamming the flywheel through the access hole does sound easier. maybe i'll buy myself a flat piece of steel or iron to use as a holding bar.

 

any good 1-2 foot (for leverage) or longer prybar will work fine
Think old school- holding the auto trans flywheel with a giant screwdriver
thats all you need

 

gotcha, my only concern was the prybar bending when you get up to 250lb-ft to tighten the crank pulley nut. thanks man.

 

It wont. I had to use this method with the motor out to get the crank bolt out. And i believe its only 180/190 isnt it for the crank bolt?