I have been browsing at G35Driver.com and have come upon this article. I feel many will say it is a not worth their time and some may say thank you. I do hope the moderators will keep this long enough for others to read and make an informed decision on purchasing these hazards for their Maxima and other cars.
Happy reading. This is the link http://dinancars.com/html/danger_of_power_pulleys.htm

 

Bump! Just so someone reads it

 

Yea that sucks, but im not going to worry about pulleys anyway, thanks tho..

 

u linked it twice

 

Yeah, I dont think it actually makes that much of a diffrence in my opinion!

 

Did you read this? What does it have to do with a Maxima? You don't remove the harmonic balancer to put an UDP on the Maxima. I have had mine for quite some time now, and there are no ill effects unless you are trying to get off the line and hang with me. I will keep this article in mind when I hit the lottery and buy a BMW.

 

**** retesnive if you do not like what you read then move on, respond to some "What is the best crap can I put on my Maxima post!" I am sorry if you do not like the article,or you thought that I did not notice who it was written by?
No you do not have a BMW , but yes you do have a mind of a neonatal .

Have a nice day .

 

This info was a big concern 1-2 years ago in the autcrossing community. I believe Yahoo Groups had about 100+ replies to the topic.Even the terminology and engineering of pulley vs balancer was at question. Mostly Imprezza's and WRX's concerned.

Like Tapout stated, it only affects cars with integrated harmonic balancers. Many cars like ours have separate components and shouldn't fear.

 

Thank you.. I commend your informative response . Now I will sleep better.

 

i love my udp, car seems to rev quicker and has more power with the A/C.

 

Thanks for look out...but UDP aren't big hp gainers, so i'm not gonna bother.

 

May not gain big HP, but my car definately has a wider power band now. Its the area under the curve that I'm concerned with. Thats where it counts. You can have your dyno queen peak HP all you want. i want practical power I can use.

 

The VQ30 is internaly balanced. The stock steel pulley has no dampening effects. I installed mine along with my new engine, as can be seen on my website. THe car revs absolutely flawlessly. No vibration, and very very smooth. No these are not big HP gainers, maybe 3-5HP on a stock motor tops, but as your mods grow this mod will yeild you more benifit. i.e exhaust may give you 3hp an a stock engine but 5 when you put it behind a Y pipe.When the NA guys get to the end of the road on mods, then $150 or so dollars is not bad for 5HP.

 

Yeah I though that our engines don't have harmonic balancers. So it doesn't matter to us. It's just a lighter pulley

 

I've had one in the past, with no problem...

But everyone says that our engines are internally dampened. Where is this dampner? I tore down my old engine (pics) and didn't see anything that acted as a dampner.

 

Maybe we don't need the dampers, it was quiet a while since I took the autotech in my school, but I think v6 motors are alot more stable and some other **** and 4 bangers and they don't need dampers but I could be wrong.

 

the balanceing is done with the counterweights on the crank

 

Would they be visible, or are they forged _in_ the crank?

 

This was discussed not too long ago. The oem crank pulley on a Maxima does indeed have a thin rubber ring that acts as a harmonic damper to damp out torsional vibration. However, the general consensus is that it is not critical to have one based on the experience of many here in the org who have aftermarket UDPs without harmonic dampers and have experienced no problems. The reason the BMW inline 6 has problems with UDPs is due to its longer crankshaft, which lowers natural frequencies of vibration and increases the amplitude of vibration at the natural frequency, resulting in eventual fatigue failure of the crankshaft.

 

=resonate frequency

 

I think im still gonna get one, like d_warner said, I want smoother better acceleration that I can have on a day to day basis and everyday driving. Im not too concerned w/ top end HP.......

 

Yes. Also known as a critical speed to rotordynamicists (one of my specialties).

 

any1 know whats the best udp out right now?

 

I don't know about best, everyone will have their own opinions. Thats for sure. I have a MotoStorm pulley, and I love. Thats all I can say. It topped the scale at about a pound even. As far as I know, its the lightest one out there right now.

-David-

 

o i think im gonna get that one, theres a good group deal on it