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Unless Honda has changed things around recently, they include a harmonic damper in the crank pulley. The OEM pulley is/was constructed with two halves stamped together with a rubber peice in the middle of them. This damps out all the frequencies that are transmitted to the accessories and/or valvetrain. Without it, Honda's used to go through alternators and compressors fairly quickly, and there have been some isolated cases of valvetrain failures.

If Honda has changed this practice, would someone enlighten me?

Also, if they've not, do aftermarket pulleys have the harmonic damper built into them? I've not been able to see a seam in the pullys on the websites pictures and haven't wanted to call the companies as I'm not buying a set yet...

Thanks

 
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Stay away from pullies. They will only cause problems down the road. The stock setup was designed to last.

 
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^^ agreed, but that goes the same with Turbo's and such to. For the real racer, a pulley would be awsome, just like a turbo, or nitrous. But you have to remeber it is one of those items that can really fauk up your engine.

 
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What about the accessory pullies, I'm not sure if the stockers have dampers or not...

Noted, I'll steer well clear of aftermarket crank pullies.

 
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aem pullies are safe, but they do not give the gains that you would like for the money spent on them.

 
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ok, well I have the DH Racing pulley- (still waiting on spacer so it is not on now) but will that in the end give me problems even if it is balanced?

 
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The man speaketh.

From what I've read here and elsewhere, you can look forward to a lot more engine repairs if you've not got a harmonic damper built into the crank pulley. I'd give DH a call and ask them about it...

I'm stickin' with mine as I'm hard enough on the thing without taking away any longevity-increasing parts.

 
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The DH pulley is balanced and it's much lighter and smaller than stock, that must take some stress and vibration off the engine. The truth of the matter is, the power is in the crank pulley, not the assesories.

 
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Cool, I'll put the cash into the buy-me-a-VAFC-and-dyno-time fund

Thanks for the advice!

 
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A VAFC-2 will give power with alot of mods, if you don't have much done there is'nt gonna be a need for dyno tuning or changing the VTEC crossover point, or atleast thats what I hear. Try seaching on it. Later.

 
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Yeah, thats what I generally gather.

Seeing as my Vic is only 2 months old, I'm stashing away money for when it gets a little older and/or the warranty expires, then I'm going nuts with it.

Would be really sweet to have a 200+ horsepower N/A Vic out there rollin' on stock alloys and with no other hints than a set of Eibach Pro Series. I think it would be quite a suprise for many of the stupid locals [who think a Mitsu Gallant/Mazda MX6 is/are the pinnicle of automotive technology and performance]

 
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around here it's toyota tercels and mirages. LoL.

 
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Good grief, I need to come down there, then I can flat out smoke them before modification.... Post-mod, though, they'd wonder WTF I was driving that just dissapeared into the sunset

 
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good thing i never bought that crank pulley, bump for everone thinkin' of gettin' one

 
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A lack of a damper will not cause alternator failure, as there is a rubber belt between the two. However, a lack of a damper to dampen 4th, 3rd, and 2.5 order torsional vibrations in the crankshaft can lead to crankshaft and oil pump failure.

 
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^^^why would they make a crank pulley if it did that to you car? but like it was said above thats like putting a turbo or nitrous on your car. they are not going to prolong the life of your car. so nothing is good for any car unless its built more or less.

 
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I have the Unorthodox Racing crank pulley and there are a couple other people with it I think. I only had mine on for two weeks before I left so I have no idea what the long term effects will be. Def. gain. Manual said 5-8hp. I shaved 3 tenths of my 1/4 with it and according to my but dyno (which may not be calibrated correctly it def. accelerates a bit quicker).

 
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Redline04, you need to get your but-dyno out of the desert and let us all know about any long term problems from that UR pulley. Take care and Godspeed.

 
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crank pullies are completely safe. new oem pullies do not come with a dampner, but come with a elastomer, which hardly aids the dampning process. there's no evidence of them causing a motor to fail on any newer ( obd1+) honda engine.

prove me wrong.

 
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No, it is a damper.

Its a damper that consists of an "rubber" ring between to parts of the pulley. And yes this acts as a damper.

You know what they say about butt dynos right? You're just pulling numbers out of your ***.

 
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wrong. it's an elastomer.

http://www.superhonda.com/forum/arch.../t-102404.html

http://forums.clubrsx.com/showthread...armonic+damper

even the B series CTR n1 crank pulley (weighs 2 pounds) is "aftermarket" oem, yet does not have a damper

 
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Yeah that's why I put the smiley.

Before pulley: 15.7 on 14"stock wheels and tires with 2.2 60ft.

After pulley: 15.4 on 17" wheels with Nitto Neogen 205/40/17 with 2.2 60ft.

Similar temps both days. So that is why I say it is good for at least .3 in the quarter.

That was th only pass I made on the 17's. After that I slapped on the BFG's on stock steelies and knocked another .3 off for the 15.1 with a 2.08 60ft