Interested in gettin a UDP but just dont know which one 2 go with?is there a difference between them same thing whats the pros and cons of these udp
thanks guys
rd


Unorthodox Racing Ultra S Underdrive Crank Pulleys,
http://www.sportcompactonly.com/prod...=2332&c=22&l=2
or
Motorstorm udp


The lightest Aluminum underdrive pulley made for the 1995-2004 Nissan Maxima,1996-2002 Infiniti I30/I35, 2002-2004 Nissan Altima 3.5 liter. The concept here is rather simple, your stock pulley weighs close to 6 lbs and these pulleys weigh in near 1 lb. This reduction in weight allows your engine and crank to become more productive once the huge, heavy stock pulley is replaced by one of these. Expect anywhere from 6-11 horsepower just by bolting on one of these pulleys. Just because these pulleys are extremely light doesn't mean they aren't strong, each pulley is carefully machined from a solid mass of 6061 T6 aluminum which is well known for it's strength and lightweight. These pulleys are 3D computer designed, tested and manufactured by Motostorm Inc. They are 100% american made. The completed design has been street and track tested for a total of two years before the release of these pulleys. Each pulley is hand inspected and computer balanced before final packaging. Not only are these pulleys the lightest but each pulley has a bronze oil seal bushing located on the back side for added safety and wear. There have been no oil leak issues with this pulley. These Pulleys are smaller than the stock pulley and require two different size belts. All belt sizes are included with the instructions. $109

 

No one can help me on this?

 

the motostorm one HAD issues with it leaking...but i see that fixed than problen with the bronze oil seal....to be honest i would go cheaper.....motostorm i believe was the cheaper.....ur only paying the the Unorthodox naem whrn u buy theirs....they are the same.....its like FSTB most of them are all teh same just overpriced

 

ok cool thats what i thought all were about the same thanks

 

NO YOUR NOT!! a udp is something you DO NOT want to be cheap with, a cheap udp could damage your motor. its funny how something for a couple of dollars could ruin somthing thats worth thousands of dollars

Be safe get a unorthodox udp.

 

ok i will go with unorthodox then

 

heard UDP aren't good for cars with audio systems in it. I still don't understand how a pull that is the same size as the orginal will provide more horsepower. aside from the weight reduction point of view of roughly 5lbs.

 

it will free up some horses, its one of those mods that will help you in the long run kinda of... just stay say you have it i guess. if you have an audio system the altenator may not charge the battery as fast as a stock udp

 

NEITHER

no gains

 

Any proof to back up this statement?

 

Sure some might say no gains as in HP wise but think of it as rotational mass.

Which is faster.... having a set of lightweight 8lbs rims or a set of heavy 30lbs+ rims. Sure it makes no HP difference but it is rotational mass right?

 

oh snap, i have a system, wen i put on my udp will my car die? never thought about that

 

it shouldn't die. From what some ppl told me, you might have lights dimming every now and them. but in most cases nothing will happen.

 

theres some 1/4 times and dynos around that show absolutly no gains, or very very small gains

 

OK..fine...3 hp big deal..it still a sucker deal

Not on hand, but NmexMax will tell you the same, and he knows the max pretty well.

 

The most help that a UDP can offer is to reduce the drag on your engine caused by the AC compressor when it is running.

The reduced drag will help offset the performance hit you take when the AC is running.

 

so whats everyone tellin me here that a UDP is not a performance modd??

 

I'm sure he's very knowledgeable. But I tend to not listen to just a few people for all answers. I rather hear from people that actually have one installed. From those people, I hear that it helps with quicker revs of the engine, which in turn puts you into the power band quicker, and that helps performance. It may not help you gain hp per say, but it will help with accessing whatever power you have available, quicker. Either way, I plan on getting one. In the end, I won't truly believe a thing til I try it out for myself. So far it sounds promising, but who knows.

 

How does it sound promising? Sounds like you are only listening to the people who believe it actually did something with no proof, and ignoring the people who have shown that its done nothing by posting quarter mile times and dynos.

 

Well, I don't see how you'll see much gain on a dyno with the pulley. It may change the curve of the power band on the graph, but I don't see you gaining. I understood that theory. A dyno is not the BE ALL for testing out performance. But you can go ahead and try to make me a believer by pointing me to some of these dyno graphs and time slips you mentioned? Or are you just listening to one person because of his or her impressive post count and disregarding the people that actually have a udp but have not been on the org as long. Not trying to offend you. I just want to see some proof on the story. I myself, with my own research and logic, find this mod to be promising and will give it a try, no matter what people think. I'm not going to just toss the idea out because a few people have said it does not help. To me, it makes sense that a loss of weight on the pulley would take away stress on the engine and make it run more efficient.

 

just get the cheapest. its all the same thing bro

 

Do you have a link to where one can buy a Mototstorm UDP?

*I cannot find any links in Google!

 

www.Motostorm.com

There was a group deal going on as well. It might be over though.

 

I had the UR UDP on my 96 Maxima for about 1.5 years. As many know on this site, I was a pretty avid Maxima drag racer. The hard truth is the UDP didn't do squat for me 1/4 mile performance. If anything, the car actually appeared to be fractionally slower.

The only thing the UDP did was:

1) Removed the VQ's velvety smooth nature because the OEM elastomer damper ring is removed when you run a UDP.
2) The engine sounded strained above 5000rpms, probably because of the lack of damper.
3) The car was harder to launch and part-throttle shifts were harder to excute smoothly. This was due to less moment of inertia.

When I removed the UDP everything improved. It was a waste of money and time. Save your money for more worthwhile mods that actually improve performance.

 

Was this just during drag racing, or could the adverse effects befelt during normal driving?

 

see there alwas mixed answer some love it some hate it...makes it hard to make a choice on what to do.....guess you just have to get it and see what happens,just doesnt make to much sense why so many people would buy them if they dident do nothing.

 

I figure it's how people follow. It's in our nature to go with the herd. The thought of lightening a moving part on the engine makes sens to me though. I'm still gonna grab one and see for myself. The Motostorm udp is only $100 anyways. If it does nothing, then it was a cheap lesson.

 

at least you're willing to learn.

 

wow, it actually hurts your car, thanks for the info Dave

 

All the time. Don't waste your money. It's completely worthless.

Sure the pulley is super light and reduced rotational inertia technically improves performance. But you've got to consider where this rotational inertia is and over how much area it is spread. Factors include the diameter, weight distribution, and distance from the motor. Wheel comparsions are always used as justification for the benefits of a lightweight UDP and that's a flawed argument. Wheels are much larger, much heavier, and much further away from the motor than a crank pulley. Significantly reducing the weight of a rim/tire and running a smaller rim, greatly reduced rotational inertia and improves acceleration. Removing 10-15lb of rotating weight from a wheel combo and pushing more of the weight towards the inside of the rim can greatly help things. Shedding this much rotational and static weight could potentially improve performance by .1 and 1mph in the 1/4 mile.

Then you've got the pulley. The stocker weighs about 6lbs and the UDP weighs 1.5lbs. Wow!!! It's 75% lighter. That's huge!!!!! Now think where that pulley is mounted, the overall weight, and the pulley's diameter. In the end, it's very insignificant. It's small, already light even at 6lbs, and it's mounted directly to the crank

The whole idea of "gains of 5-10whp" trickled down from Mustang clan. Lots of Stang drivers use UDP sets and can gain a legit 5-10whp. BUT these kits replace 3+ pulleys AND they significantly underdrive the water pump. Underdriving the water pump is where most of the gain comes from. Guess what? On the VQ the water pump is driven by the timing chain, not the accessory belt system.

 

Interesting. I'll definately take that into consideration. Thanks for the info man.

 

hmm... never thought about it like that. Thanks for the input Dave B!

 

yea plus the motorstorm said it comes with the new belts 2 soo i dont know maybe its worth it maybe not

 

i had an unthx udp pulley that ****ed my car up. I had it installed by a reputable shop. Everything went fine. About a week later I'm driving my car and boom. No oil pressure. I was like ****. So i have my car towed to the dealership cause I used to work there and they hook me up. They said my oil pump and the gear on the chain like destroyed it self. And showed me chunks of metal. At least that's my understanding. They fix it and returnthe car to me. Almost two weeks later the same thing happens agin! I take it back they tell me they will waranty the work but the underdrive pulley's what's causeing it. So i have them reinstall the stock pulley. And I've driven the car for almost 9 months now with no problems. I can't be 100 percent that was the problem but It seemed to fix it for me. The gain from the pulley is so minimal and ton's of people have had problems like me. I would skip and save for something better.

 

oh my head...

 

HAHAHA ahhh no.. in NZ skylines are a dime a dozen.. especially the old R32's.. its only places like the USA that don't get japanese imports that they are rare

 

there are so many beater Skylines there its not even funny; my family lives in Auckland and I've been visiting em for the past 4 years so I know what you're talking about...

Btw, I believe SCO has a GD on Unorthodox UDPs still... just call Steve G and he'll hook ya up. I think the Motostorm deal is still going on too, so check those out if you guys are still in the market for UDPs.

 

if you really want a pulley i'll sell you mine. Just make an offer