Best mod I have done yet. Its been 3 days since they went in and everyday my car gets faster. I thought that comment on the instructions about letting the CPU get used to the lighter rotation was an exaggeration but it IS COMPLETELY TRUE. My car accelerates so much faster and smoother. It feels like Vtec kicks in right away I don't get the hesitation that felt before. Used to feel like it took a big breath before jumping over a cliff. Now it accelerates as if I am in first gear and every bit of extra gas has an even correlation with my speed.

They look great and are much lighter than stock. I had the dealer give me my stock parts back in the same box my UR pulleys came in and man they are heavy. I know a lot of you talk about under driving is bad but these pulleys barely underdrive their gains come primarily from the light weight design. I compared them and they are nearly same diameter as stock. I read the Dinan article and believe our engine is internally balanced not by the crankshaft pulley which doesn't seem to have any counter weights on it. Anyway I got them in and they work great so I just wanted to let you guys know what results I was getting a few days after the install. What you all decide to do when you mod is up to you. NOS works but I draw the line there because it wears out the parts faster but some exhaust work, suspension and brakes lighter pulleys and better breathing is OK by me.

 

I just looked through your pics and they look great, You have a damn nice camera... I really want to get the obx headers first then do a dyno with just those then I want the UR pulleys. How much do they cost for the complete pulley kit?
I too have hated what i call "lag time" the time between when you give it gas and the time that it actually accelerates. Are you saying that the pulleys eliminated this lag time??? If so I'm gonna buy those real quick like. That lag time has been my biggest complaint with the car.

I envy you now...

 

Thanks for the update.

 

so you got them installed at the dealer? HOw much did that cost you?

 

i can tell you that the computer has NO CLUE that you changed any pulleys. it's all in your head and you're getting used to the power increase.

 

I do have a question, I know there's thrills about the mod, but what about life span of the pulley? I read articles before about ud pulley failing after a short time. It's due to the durability is not a top priority of the racing part, unlike like OEM. I don't recall what the component is called. It makes the pulley out of wack because of premature failure , then damage the crank. Of course, that doesn't apply to all, keep us up to date like after 6 months.

 

I heard that the UR pulleys were giving trouble (forgot what kind), is that true?

How much was it?

Where can I get them?

How much was the dealer installation?

 

Does it void your warranty on engine parts?

 

crank pulley definitely will

 

I don't remember posting pics but whatever lol. Anyway it was going to be 250 but ended up being 170 for the install since the tech said he had an easy time with the install. Um I went to the dealer so that my warranty wouldnt be an issue and trouthfully if the engine did ever have a prob all I have to do is switch the pulley before getting serviced but I highly doubt that will happen since these dont really underdrive and we dont have a harmonic balancer counter weight on our crank pulley.

By the way are U saying the gains are in my head? I know what my car drives like and I can tell when something is different. I didnt say I got 100 HP at the wheels just that there is NO LAG and RPMS fly and Vtec kicks in right away.

It did change each day up to the third day. now drives the same as the third day. 1st day it seemed slower. 2nd day lag gone and acceleration was better. Third day I can pass in third and forth gear no prob. I feel a difference but I want to dyno my car when I find a place to do it.

 

no, i said the "getting used to it" part was in your head. the computer has no way of knowing you changed them, so it doesn't have to "get used to the lighter rotation".

the gains are obviously felt, i won't argue with that.

if your dealer said that warranty wouldn't be an issue, i'd get it in writing. i've heard of dealers not fixing something like a transmission synchro because someone installed an intake on their car, so they would love to blame something as critical as the crank pulley.

 

can you take a pic of the crank pully.....im very surprised you say it has no harmonic dampner....can you confirm on this....also can you or if anyone has the helm look it up to see if we have a harmonic dampner? thanks

JON LERD

 

I was told by a racer one time, "Never use a pulley system that replaces the crank pulley"....Chris Rado told me that Honda (Acura) uses a harmonic balancer in all crank pulleys. If you use a different crank pulley you might get an extra HP but overall it will cause improper balance in the bottom end. Hence the pulley kits that are only accessory drive kits.

Charles

 

2) "How do Unorthodox Racing pulleys give me more power?"
Weight loss is the most critical factor in HP production, each lb. of mass taken off the crank/eccentric shaft is worth approximately 2.7 HP and the figure increases with forced induction, nitrous, VTEC and increased RPM's. Only 15-20% of the gains seen from our pulleys comes from the underdriving. We achieve the maximum gain for each application/model by the singular use or combination of reduced diameter ("underdriving") and weight loss versus the OEM crank pulley/s. This principle allows us to maximize the HP gain without causing any adverse effects in the general function of the vehicle.

The diameter of each of our crank pulleys is reduced specifically (from 20-30%) to the vehicles accessory needs. In other words we maintain all accessory minimums: air conditioning efficiency, power steering feel, and voltage (minimum allowable voltage 12v) even at idle with everything electrical on in the car. There are no adverse effects from the use of our pulleys whether Ultra S, Ultra R, or Ultra SS pulley sets are used. Bolt them on and forget about them, then just follow your vehicles normal maintenance schedule.


3) "Isn't my stock crank/eccentric pulley a balancer, harmonic/torsional, or vibrational damper?"
A common misconception is that factory crank pulleys on certain vehicles are harmonic dampers. The fact is, on todays late model cars the factory crank pulley is designed to reduce NVH (noise / vibration / harshness), which does not affect crankshaft or bearing life. These are noises and vibrations from the engine compartment that may travel into the cabin of the vehicle when the engine is running and the stock crank pulley is used to reduce NVH for the occupants (similar to the use of resonators in the intake to quiet intake noise). We do not manufacture crank pulleys that replace or eliminate a damper in applications where the factory crank pulley is an actual harmonic damper (such as 90 degree V engines).

Our pulleys are lightweight, CNC-machined 6061-T6 aluminum and are by design "0" balanced. Because of this, owners have called to tell us how much smoother their engine feels after installing our pulleys. Unorthodox Racing has been manufacturing and selling pulleys for over 5 years without a single engine failure due to the replacement of the stock crank pulley. This is testament to the quality and reliability of our products.

Owners who have engines that use balance shafts must understand that if they eliminate their balance shafts their engines must be balanced and blueprinted if they expect to have no long-term engine problems with or without the use of our crank pulleys. This balance shaft elimination is rare and only happens on a few models that are modified for racing only (Eclipse/Talon/Laser/Galant VR4/Conquest TSI/Starion just to name a few).

 

12) "Can I use the underdrive pulleys if I have a high wattage stereo system ?"
The Ultra A, R, S & SS pulleys still allow stereo systems of up to approximately 400 watts RMS. If the stereo system in question is above the amount then the owner has two options. One we can make a custom alternator pulley, which will be smaller in diameter and will increase the voltage output, or they can purchase capacitors. Capacitors are the better choice as they store the power the amps need for peak draw of the amplifiers, these units allow the owners to achieve the cleanest and most powerful sound with no loss of voltage even with underdrive pulleys installed. Another good option would be to install a second battery for the stereo.

Our 1988 Project RX-7 has a 700 watt RMS stereo and our 1993 Project Supra has a 500 watt RMS stereo and they both have no voltage drop problems with our underdrive pulleys.

 

Yes CL and TL do have the harmonic damper (True name is Torsional Vibrations damper) For Pics and all read here : ....
http://www.acura-cl.com/forums/showt...ght=UR+Pulleys

 

They are so well balanced my engine runs smoother. I think the rubber doughnut part everyone raves about is more for vibration in the passenger side than keeping your crank shaft from cracking. I could maybe see a heavy, poorly balanced crank pulley ,IE the OEM one cracking your crankshaft if it didnt have the rubber but not these. Remember the OEM manfacturer isn't looking for refined expensive parts just a reliable cost effective way of getting the job done. Who thinks the OEM tires are good? Everyone who owns a TL knows they are horrible but Acura still uses them. Go figure. By the way Honda used inferiorly designed clutch packs in their trannys for many models and didn't redesign them till tens of thousands failed so just cause its stock doesn't mean its best. Anyway if you are so afraid dont get them but your missing out.

 

Where did u buy them and get them installed. Im in the NYC area and have been thinking about doing the same! Let me know!! Thanks!!

-Rich

 

Hey NighthawkBlack....did you get the Ultra S Street Crank Pulley

 

I got a set of three in a nice color AC, Pwr steer and Crankshaft. I had them installed at the dealer.

 

By the way its been 6 months and no problems yet

 

Hey Nighthawk. Do you have a system in your car? I always wanted to get pulleys but everyone said dont get it because it will messed up my alternator up fast. cause i have a system. Is that true?? They told me to upgrade my battery and alterntor then get the pulley.

 

if you have a system, don't upgrade the alternator pulley.

 

Anyone got a web site for the UR pulleys??

 

I agree with 1999TL on the alternator. After my pulleys were installed since the alternator is under run, I noticed a slightly lower output but I don't have a system. I wonder if anyone makes higher output alternators for our car or more preferably rebuilds the inside materials so we can get more out put but keep pulleys. Is that possible?

 

I wonder how the AEM pulleys are compared to the Unorthodox pulleys. I have AEM on the TL and Unorthodox on the 300ZX...

 

Well that won't be a good comparison. I guess you need same year TL miles etc and same pulleys on a Dyno. I am thinking about getting a system and found alternators that are higher output but built on stock case and pulley so that I could underdrive it and still get more juice than stock. For those of you wondering, UR pulleys underdrive the accessories very little, most of the gains are from less rotational mass.

 

I have the AEM pulley kit, ive had it for over 1 year and a half. Works great... Dont notice any hp gains, but it does feel much more responsive.

I had a question... AEM pulley kit only came with two pulleys. Which one is it missing??? Does the UR pulleys have all 3?

 

I am pretty sure AEM only makes 2 pulleys for Accord TL V6. They dont make the crankshaft pulley, only the power steering and altenator

 

okay, I think I'll get the Underdriver pulleys soon then...

 

DAmn! should i go for speed and take out the system or keep the system and drags..

 

Or you can add pulleys and leave the system. I want a system eventually so I think I am going to get a stock case built higher output altenator so I can use the UR pulley underun and still get more amps than stock with no pulleys