tarpoon

Before I begin I tried the search.....I'm looking to buy a underdrive pulley and a little unsure which to get. I'm looking at the unorthodox and the RVM, and not sure which is the best one is th Unothodox worth the price???

Any suggestions are appreciated

03BlkSETE

iTrader: (3)

Most people here will say to get the RVM. It is a little heavier than the Unorthodox but considerably cheaper. Some other choices would be to:

1) Look on the For Sale forum to buy an Unorthodox pulley at a much better price

2) Take a look at this company's pulley. The altima guys love it.
http://www.definitivemotorsports.com/main.html

3) Try and contact ASP to see if their pulley is available. An org member, Larry, is using the prototype.

2k2kev

what are the proven gains for these? I'd like to see independent dynos... not manufacturers' dynos.

tarpoon

What's the difference between a street crank pulley and a lightened
underdrive pulley??

03BlkSETE

iTrader: (3)

Dyno your car, buy and install a UDP, then dyno your car again and you'll have your independent dyno.

03BlkSETE

iTrader: (3)

I'm not sure what you mean by a street crank pulley, maybe the Unorthodox one? If that's the case all three companies I mention make essentially the same product. A lighter than stock, underdrive crankshaft pulley.

2k2kev

so you mean all these people are spending $80 - $200 on something and nobody knows if it actually does anything...

y2kse

iTrader: (1)

It does something, all right. But you'll never know, will you? And I'll bet you never blew $80 to $200 on nothing more than adding fat cells to your body. So enjoy your skepticism, 2k2wannabe. I'm sure it will add more horsepower to your Maxima.

2k2kev

so we're going to do this again?

all I'm asking is if he knows any REAL hp gains.... not butt dyno, not "I felt it after 4k rpm", I mean real hp gains. Dyno? Or since that costs money, is the car faster 0-60 or 1/4 mile (that's free)?

Turbo is proven. People with superchargers have pictures of their dynos in their wallets and show them off like it's a child. Even intakes are getting dynoed.

So rather than rehash this how about you let me ask 03BlkSETE a question and you shut your mouth.

y2kse

iTrader: (1)

The Secret of Life, Rule 16:

It's better to give a resentment than to get a resentment!

I, for one, see no sense in paying more to dyno test the results of a mod than I paid for the mod itself. You, however, may do as you please.

rocktboy

so would I.....but physics is physics. when the rotational parts on the engine is lightened, there WILL be a difference. a lightned flywheel could make the most difference but costs $$$$ in parts and labor. whether the difference is worth the price is entirely up to the individual.

nothing wrong with a "butt" dyno. it makes people happy when they can "feel" it instead of showing people dyno charts that shows a gain of 5 hp that they really can't "feel"

2k2kev

and if you were my dad I'd give a ****.

hmm, I've never actually used the 'ignore' list before but apparently removing your posts won't reduce the intelligence here at all, so away you go!

03BlkSETE, looking forward to hearing if you have a dyno or any other experience that shows gains from a UDP. Thanks.

ripper

UR has a 2002 Maxima dyno on their website. FWIW, I based my decision on this information.

http://www.unorthodoxracing.com/dyno_maxima_2002.html

y2kse

iTrader: (1)

The Secret of Life, Rule 4:

Never underestimate the power of denial!

Sayonara, 2k2wannabe . . .

2k2kev

EXCELLENT! Thanks. But the reason I keep asking for a dyno besides the manufacturer is because of stuff like... what gear was it done in (and why did they cut that off the jpg)? How many runs did they make? What else did they do between dynos? This is a start, but I'd like to see an independent one.

Rocktboy, I agree with everything you said. I just get the feeling a lot of these "butt dyno" gains have more to do with "I paid $xxx for this and I better feel something" than it does with any actual gains. Sorry, but nobody's butt is tuned well enough to "feel" 5hp, except maybe y2kse's but what he does on the weekend is his own business.

I said a while ago I'd get an injen and UDP and dyno after. That's happening as soon as the end-of-year bonuses get deposited .

In this thread I listed at least 5 mods that are supposed to give 5-15 hp. Taking the low-ball number, we should all be able to get another 25 or 30hp, or thinking positively, 60hp just by adding those little things for a few hundred bucks. I'd just like to see dynos of this stuff (and like I said, I'll contribute to the 'dyno list' when I get my stuff installed this spring).

rocktboy

so true......

y2kse

iTrader: (1)

The Secret of Life, Rule 8:

Never take ANYTHING personally!

F23A4

That said, if I could truly gain 9hp/11 lb-ft for only $229, it's good money. But 2k2wannabe, does have a good point: an independent analysis would go along way towards legitimizing Unorthodox Racing's claims (not too mention, the claims of most other mod manufacturers).

Peace

y2kse

iTrader: (1)

And then again . . .

There is a collective wisdom that accumulates here. Sometimes that wisdom is based on quantitative data and sometimes it is not. Quantitative data is good when it can be acquired. But often it is suspect as well, particularly when the outcome of the data is based on incremental gains as is the case with many of the mods available for NA Maximas.

If the majority of respondents indicate that a mod has value, I'm willing to consider it without benefit of quantitative data, particularly when the cost of the mod is small. Mods such as timing advances ($40.00) and a RVM UDP ($80.00) are small enough to take chances on. And I, for one, am pleased with the results of both.

As I said before, I'm not about to spend more money testing whether these mods added horsepower than I did on the mods themselves. My engine responds better than it did before I incorporated the modifications. And that's good enough for me.

If my opinion or my approach to modifying my Maxima bothers some people, that's their problem . . . not mine.

F23A4

That said, if I could truly gain 9hp/11 lb-ft for only $229, it's good money. But 2k2wannabe, does have a good point: an independent analysis would go along way towards legitimizing Unorthodox Racing's claims (not too mention, the claims of most other mod manufacturers).

Peace

y2kse

iTrader: (1)

Exactly, F23A4. A lack of independent analysis was the reason why I was never willing to spend $229.00 for an Unorthodox Racing UDP. But I've pi$$ed away more than $80.00 on dinner before. So I figured I had nothing to lose by paying that much for a UDP from RVM. And I'm glad I did.

tarpoon

So another newbie question, RVM's website has a couple of different pulley's and I don't know which one to order

RVM Racing - Nissan Maxima 1995-2002 Lightened Underdrive Crank Pulley
Price $83.99

RVM Power - Nissan Maxima 1995-2002 3.0L / 3.5L Street Crank Pulley
Price $94.95


I assume the first one

thanks for the clarification

y2kse

iTrader: (1)

I suspect they're the same pulley. But you might want to call Eli (pronounced El-lee) and ask him. You can get his number off RVM's web site.

03BlkSETE

iTrader: (3)

Sorry to dissappoint you but y2kse's posts pretty much echo my feelings about this subject.
I have spent several hours researching the effects of the UDP, including going through countless posts not only on this board but on other boards to. I read manufacturers claims, and I've talked to modders that I respect and gotten their opinion. The UDP mod has been well accepted by the modding community (for many types of cars) for a long time now as a proven performance mod. I feel no need to spend additonal money to test it personally.
What I don't understand why you expect somebody else to dyno or performance(no, it's not free) test this mod. Why don't you be the one to accomplish this? I also don't understand why you would insult the many people who have chosen to purchase a UDP by insinuating that they are stupid. Perhaps you didn't mean to, but that's how I read it.

One more comment/question. Are you absolutely sure there are no independent dyno's for the UDP mod?

2k2kev

if he said it like you did I'd have no problem with him... I just got tired of him following me from UDP thread to UDP thread flaming me for asking if there are any dynos.
No, I'm not sure. You said you read this board and others... I've only read this one, and for the reading and asking, I've never seen a dyno that wasn't manufacturer-provided.

I also said higher up in this thread I am planning on getting an injen and UDP and I'll dyno after I do. I believe there can be gains from a UDP (that's why I will take my chances on it), it's just odd that nobody can show paper and graph about it.

and if I insulted all UDP owners, sorry. I only meant it about one in particular.

BigCat44

Keep in mind though that a Dyno is a tool and like any tool used for measurement it can be used to benefit whatever outcome you would want. I went through this with countless motorcycles and I refuse to go through with this on a car. Drag cars can Dyno at 900 to 1000 hp and unless they can put that power to the ground ie; 1/4 mile times then it doesn't mean a thing. As for the Butt Dyno or SOP (seat of pants) I go for complete feel. True you won't be able to feel 5hp as you would 50 but thats not the issue, it's not the hp but how the car can apply that to the ground and pull or move from a to b in what amount of time. Just so you all know my RVM pulley was ordered this morning and I can't wait till it gets here!!!

y2kse

iTrader: (1)

Dyno run 001 (jwt intake and cat-back)
SAE numbers are corrected at 0.97SAE

RPM.. HP... Torque
4100 125.7 161.0
4200 128.6 160.8
4300 132.8 162.3
4400 136.9 163.4
4500 140.2 163.7
4600 142.2 162.4
4700 143.5 160.3
4800 146.2 159.9
4900 147.1 157.7
5000 148.7 156.2
5100 148.1 152.2
5200 148.3 149.7
5300 150.5 149.1
5400 152.3 148.1
5500 155.7 148.7
5600 157.2 147.4
5700 157.6 145.2
5800 156.6 141.8
5900 154.3 137.3
6000 153.1 134.0

Dyno run 004 (jwt intake and cat-back and RVM Crank Pulley )
SAE numbers are corrected at 0.97SAE

RPM.. HP... Torque
4100 131.0 167.8
4200 136.0 170.1
4300 140.4 171.5
4400 144.0 171.9
4500 146.6 171.1
4600 148.7 169.8
4700 148.4 165.9
4800 149.2 163.2
4900 150.7 161.6
5000 151.6 159.3
5100 154.8 159.4
5200 156.7 158.2
5300 158.7 157.3
5400 160.5 156.1
5500 158.4 151.3
5600 155.1 145.5
5700 129.0 118.8 <-- got off gas doesnt matter
5800
5900
6000

02MaximaSE

http://www.unorthodoxracing.com/dyno_accordV6.html


take a look at the accord v6 gains!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!

20hp

03BlkSETE

iTrader: (3)

They have a full pulley set. That means lightweight accessory pulleys in addition to the the UDP. I and others been trying to convince UR, Definitive motorsports and RVM to make these for us. UR and Definitive said they would but we would have to take the chance and purchase them or at least put down a deposit without dyno results. And we would need 20-30 to do this.

Dave B

I gained about 9fwhp and 6fwtq with the addition of the Unorthodox UDP and a WSP NON-Mandrel y-pipe in place of my Stillen mandrel bent Y-pipe. Same dyno and very similiar conditions (correction factors within a hundredth). The numbers were 183fwhp/193fwtq vs 174fwhp/187fwtq. There were portions on the dynoplot that showed increases of over 12fwhp. I had dynoed mid 170s on two seperate days (4 runs) prior to the install of the new y-pipe and UDP. I have no doubt that the UDP attributted to the increased gains because a non-mandrel bent y-pipe won't flow that much better than Stillen's mandrel y-pipe.


Dave

SterlingMist00

Woooohooooo! I am getting my Unorthodox UDP tomorrow; install hopefully on Friday at Jeff's place (Maximum Tuning.net)

y2kse

iTrader: (1)

Just curious. Why did you decide to purchase a UR UDP instead of an RVM UDP? The performance difference between them has to be negligible. And the RVP UDP is less than half the cost of a UR UDP.

SterlingMist00

Because they are the premier manufacturer of UDPs and they have been selling them since 1997 (product development since 1995); so I felt more comfortable going with Unorthodox Racing. In fact, I went to their headquarters this morning and picked it up in person....to be installed in a couple of days.

y2kse

iTrader: (1)

Cool. Thanks.

bigdo26

iTrader: (3)

i hope to get this mod in the summertime... along with the headers. Max wants more power. good luck with your purchase

Virus

iTrader: (1)

This is for the Altima, but since we put out the same numbers I thought it might help. 6.5 fwhp gain from the UR UDP.

http://www.nissanperformancemag.com/...r02/altima_ur/

2k2kev

thanks... real numbers are good.

so this is a real underdrive pulley (smaller than OEM)? Who makes the same size but "lightened" pulley?

y2kse

iTrader: (1)

Yes.

Nobody.

PoLo

iTrader: (7)

correction, unorthodox makes a lightened, same size pulley, i forgot the part no. for it. i emailed them for the correct part no. but they've yet to respond (not surprised)

as soon as i find the part no., i'll post it. im specifically getting the lightened same size pulley for audio system reasons.

y2kse

iTrader: (1)

I wasn't aware that UR made a standard sized, lightened Maxima pulley. I stand corrected.