UR Underdrive pulley
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UR Underdrive pulley
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?
#4
I'm Down Right Fierce!
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.
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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.
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.
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Originally Posted by S1CK TypeS
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
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Originally Posted by BraveDemon
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.
#11
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
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
#12
www.unorthodoxracing.com for full tech info and actual weights
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Originally Posted by SatinSilverTypS
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?
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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.
The stock OEM pulley is about 8-9 lbs and the UR pulley is about 1 lb.
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Originally Posted by Excelerate
The stock OEM pulley is about 8-9 lbs and the UR pulley is about 1 lb.
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.
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Originally Posted by '03TL-S
so having the stock size pulley or the underdrive one will have the same outcome?
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Originally Posted by S1CK TypeS
wait so if u have the underdrive and a 600watt RMS or higher system what could possibly happen?
#20
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
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Originally Posted by Excelerate
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.
The stock OEM pulley is about 8-9 lbs and the UR pulley is about 1 lb.
The UR stock size pulley also gives u more HP like the underdrive one?
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Originally Posted by Muhtish
where can I get underdrive pooley and how much do they usually run?
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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.
how is the installation of the pulleys? professional recomended or is it like installing headers etc.
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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.
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.
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Originally Posted by Razzi
how long did the installation take?
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.
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Originally Posted by stheman
satin silver I just got a UR pully was the crank bolt reverse thread or normal?
Originally Posted by S1CK TypeS
hey satin do u kno how hard it is to install the alternator pulley?
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.
#33
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Originally Posted by SatinSilverTypS
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.
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Originally Posted by fsttyms1
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.
thanks in advance.
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Originally Posted by tst32tl
hmmm..... I'm going to get the UR crank pulley and find a mechanic to do it for me. :P
#36
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!
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!
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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.
#38
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
Think old school- holding the auto trans flywheel with a giant screwdriver
thats all you need
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Originally Posted by 01tl4tl
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
Think old school- holding the auto trans flywheel with a giant screwdriver
thats all you need
#40
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Originally Posted by SatinSilverTypS
gotcha, my only concern was the prybar bending when you get up to 250lb-ft to tighten the crank pulley nut. thanks man.