I was thinking of getting pulleys for my 03 cls- 6p what do you guys suggest?

How hard are they to install?
How long will it take to install?
Ballpark how much am I looking at spending?

Anything
else that you guys could add would be great!

 

I took the install to a honda/acura tuner, it took about an hour and 10 minutes and cost about $75. The DIY obviously involves getting the OEM pulley off which I've read can be a major pain in the ass even with air tools.

I got just the UR under drive crank pulley for $172 shipped.
Install- $75
New Belts for the smaller pulley-$54 for two belts.

So about $300 in total costs. Great mod, you'll love it.

 

Yeah but what about power increase? Could you tell anything....could someone be more specific, im intrested myself..

 

It doesn't 'gain' you power, just frees up a nice amount. I'd like to say 10 at the wheels, but I'm not sure about the exact #'s. There are a couple of dynos around this forum with the before and after the pulley runs. The stock pulley weighs 8.48 pounds on my bathroom scale and the UR in box with packing materials was 1.00 pound! The engine jumps up in revs a lot quicker right into vtec and the peak power band.

Best mod for the money! (maybe except for those $88 headers)

 

i hve both the XS headers and Crank pulley and by far the best 275 dollars ive spent on the car HAHA!

both giving at least 20+ to the wheels def worth it!


my local speed shop Obsession Motorsports quoted me 130 for my pulley install.....

 

So which pulley should I do, The Crank one sounds like it is the best bang for the buck. What other pulleys are available?

 

theres the alternator pulley but from what I've read, theres possibly 1 hp to gain, and theres one other pulley that I cant think of. The crank pulley is the way to go.

 

ending up going w/ the crank. From what I've heard the rest are just for show.

 

I just had the 3 UR pulleys installed by my mechanic...$300 shipped for the pulleys...$75 for the install...I watched him do it..and TCM 01 CLS was right on the money...getting the OEM crank pulley off ..was a major pain in the butt. it took him a little over an hour for the install....what a great worthwhile mod!...motor revs much faster...pulls all the way thru the rpm range..Im tickled pink...love it...TCM was also correct..none of those mods adds any hp..it just frees up whats already there...

 

ive been told the same thing...about..10-12 hp for the crank puley...and 1 hp each for the other 2 pulleys

 

Dyno results on a 2003 Acura CL Type-S 6-Speed:

Maximum Gains: 13.5 HP
Torque: 9.3 lbs.-ft.

From the UR Website

 

I really dont see how a dyno can tell their is a hp gain after installing the pulley. Shouldnt the dyno read the same amount since the power was always there?

 

Engine revs much smoother on acceleration. Small feeling of more throttle response. When you lift the hood people notice.

 

Is there a new belt needed? Is it the same size as oem? Where do ya get it if needed?

And i have 2 10's in the trunk with a cap, do you think with the cap i should be ok from burning up my alt or should i not risk it? Anyone with a system out there with the underdrive smaller pulley? Is stock diameter even worth it?

 

MikeCLS6, the pulley frees up horsepower, it doesn't add more horsepower, thus there is still the same amount of power produced at the flywheel, but more of it is able to get down to your tires. The dyno measures what's at the tires and not the flywheel. Thus more power to the tires, the higher the dyno results

 

Guys...

What's the difference between "freeing up horsepower that's already there" and "adding horsepower?"

None of you are making any sense.

Adding lightweight wheels would change the power that gets transfered to the pavement so I guess that would be "freeing up horsepower that's already there" but the lightweight underdrive pulley reduces the mass on the crankshaft and spins the accessories at a slower speed which increases the operating efficiency of the motor which in turn leads to greater horsepower produced by the motor; not just watch reaches the wheels.

 

If you put the motor on an engine dyno (not a chasis dyno) and ran it with the stock crank pulley and then with the UR lightweight underdrive pulley you'd see a measurable increase in horsepower.

 

Also most of the hp gains are in the crank pulley but the accessory pulleys will net you about 1 hp additional for each pulley.

 

Let's be honest. A 1hp gain is not measurable. We're talking a 0.003% increase in power. It's just not possible to accurately measure that type of minimal power difference.

I could fart into my air filter and see a similar variation in performance.

They do look nice though.

 

It isn't worth it IMO and that is why I always just recommend the crank pulley, but for the guys that are looking to squeeze out every additional hp they can get (and also the bling factor) then the acc pulleys can help. I have the whole Ultra SS set on my turbo Accord but most of the gains are in the crank.

 

Id pay to see you do that

 

So what size belts are needed?

 

Gates belts:

K040425 & K060441

 

Are you looking to get a pully? For some reason I thought you already had one.

 

Nope, but I am testing the Ebay 1 stay tuned.........

 

just pissed myself

 

I've been testing it... drove the car down to Orlando from Atlanta in s a straight shot, bs'd for a week, then came back... i'm happy with it

 

I agree with mrsteve. Adding a lighter crank pulley will increase HP output because there is "less mass" to turn. It is like adding headers: It reduces backpressure and increases exhaust flow resulting in better cylinder scavenging. The result: increased HP output.

 

i must say that this is by far the funniest thing i have read on this forum. what if two ppl farted into the filter...at the same time?

 

so wat belt is needed it is the timing belt

 

Drive belt, for the rubber belt that goes around your engine.

 

when it comes to replacing a moving part of the engine assembly, i wouldn't go ebay, but thats just me. i thought sway bars were gonna be my next mod, but i think a new crank pulley is gonna get priority!

 

hmm...........$175 or $26?

 

So If I get the UR Crank pulley what belt do I need to get? I saw a few mentioned a page back but I am not sure if thats for the alt or crank. If someone could give me a part number for the new belt that the UR crank pulley uses I'd greatly appreciate it.

 

You need 2, The 2 posted are the correct ones.

I would order them from www.rockauto.com

I had to since I could not get gates belts locally. No one sells them here.

 

thank you very much!!!

 

http://www.unorthodoxracing.com/Merc...Code=clultraSc


Is that the correct pulley for an 03 CL-s 6sp?

Whats the difference between Stock Diamiter and Underdrive pulleys? Which do I get? Which one uses the K040425 & K060441 belts?

Also what is the difference in the Tuner Series? Will they all fit the same belts?

Sorry for so many questions, I just don't want to get the wrong thing.

If you could please link me to the one that I should get.
Thank you very much

 

I HAVE HAD THE BOMZ PULLEY ON FOR A FEW MONTHS W/600 W SYSTEM. NO ISSUES!

 

oh, i completely understand the cost difference... but im just a bit leary.

 

As you should be. UR's pulleys are CNC machined and 0 gram balanced. You would be lucky if the ebay pulley vendor even knew what a CNC machine was. Some people though don't understand a few important concepts:

1. It is extremely important that the crankshaft pulley be balanced correctly, considering it's on the end of your crankshaft which is attached to your rotating assembly.

2. Ebay doesn't support Acurazine. Acurazine members are able to have free membership b/c of the vendors who support it and Acurazine vendors and members spend time giving advice and help to Acurazine so why give your business to ebay?

3. Ebay vendors tend to sell poorly manufactured copies of other companies' products and therefore take away from those companies who are actually innovators. It is companies like Unorthodox Racing that develop new products and offer customer service and do actual R&D. They have expensive machinery so that they can ensure proper quality.

That being said, some ppl are willing to risk all of that and peace of mind to save some money. Of course later on when they have issues they will blame all aluminum crank pulleys for the problems that a poorly manufacturered pulley will cause.

And yes I have seen these pulleys in person for a number of different Japanese cars and the quality has been subpar.