I noticed something while installing my Unorthodox Racing crank pulley. It doesn't have a harmonic balancer like the stock one does, this is something that I thought all crank pulleys should have to absorb vibrations and keep the stress off the crank. Is this bad...or am I mistaken? Need some clearity on this, Thanks Jason

 

I cannot believe even after the 100+ posts on this issue, that you got as far as to installing the crank pulley, and you didnt know it didnt come with a dampner, good job buddy FWIW, Ive had my pulley on 25K no problems.....

 

I had mine on for 15K no problems.

The VQ motor is balanced internally.

 

Really? The UR Pulley didn't have the harmonic balancer? NO WAY!

I better pray that it won't mess up my crank shaft!

 

I know I don't have any room to talk, but I've had mine on for 6000 miles with no problems.

 

Sorry, Shoot me I didn't read or see any post about it so I missed it and I didn't hear anything about it. Thanks for answering my question and not flaming me so bad Alberto Thanks though

 

I'm still with the group that says not to use an undampened crank pully. Why would nissan spend extra money to add this to the pully and lose power because of the weight? This is also not something that is going to show up as a problem in the near future, but for those of us who plan on keeping their Z for a long time, you may want to think about keeping the stock unit.

 

The stock does not have a harmonic balancer either.. The rubber material on the stock is not to balance or remove harmonics of the engine but to reduce ringing within the pulley..So it has been reported by SAGE engine experts..Engine rotating mass is internally and dynamically balanced. Putting on another balanced crank pulley does not upset this balance..

 

what is "ringing"?

 

Ever run your fingers around the rim of a glass goblet. Kinda rings. A high pitched vibration when the belts run in the groove of the pulley..

 

interesting. thanks for the input!

maybe i will buy a pully now..

 

Not sure if yoru serious or sarcastic, but sorry if I came off like an a$$, spend 2 months on here and you'll be answering the newbs @ that time the same way. Enjoy your pulley, rag your car with confidence, it will be ok BTW Ive had my pulley for 30K miles, not 25K....

 

go for it! you will love it!

 

Yeah, I'm not a newb, but I was being sarcastic. I did do a search on this and I got a bunch of other crap, instead of reading a 100 of other posts to try and find the info I needed, I posted a new thread about it. Sorry but I'm not on this forum every day reading every post.
BTW, you stated:
Enjoy your pulley, rag your car with confidence, it will be ok.
Thanks pal
One more thing, if you answer the new guys this way too, why even bother making a post at all. I think there is a forum for a$$h@les somewhere.

 

Yes, your engine may explode because of the lack of a glued on piece of rubber. Be careful!

 

Thanks for your usefull comment. You guys are cracking me up. Well I got the info I needed so I thank the guys that replied with a mature response. I'm done with this thread.

 

Quite frankley people the search engine SUCKS. and I am real tired of all of you folks who think you need to flame the uninformed for not using it. If you don't have something of real value to add to a post, why not just ignore it? Everyone at some point was a noob with this car, Give the rest of them a break. What ever happened to " if you don't have something good to say Shut the **** up!" don't be a Dick.

 

Here's a little lite reading for you on the subject of the U/R pulleys, etc ...

https://my350z.com/forum/engine-and-drivetrain/30921-ur-pulleys-and-harmonic-balancers-in-general.html

 

i wasn't being sarchastic either. from all the reading i have done, it pointed me towards the stock pully being better for the engine. i think crawford makes ok parts, though i think the owner has a sub triple digit IQ, and they said they were not going to include a pully in their "crawford NA package" which basically included all na bolt ons + head work and cams because it could bork the engine in time especially at the higher RPMs and abuse it would be seeing.

that being said. i might as well get one. my mods are going to be fairly light seeing as people aren't getting all that much power from all these expensive na parts, not to mention i have a nice 100k mile warrenty. i'm just going to do a popcharger, ME 1/4 spacer (or 350evo intake whenever that comes out), pully, 3.9 rear and l-spec flash. for go parts at least. then probably a set of sways and good pads/fluid for turn and stop.