Hey,

I would search but its down. but who has one?

Ive read many good things about it, and mostly everyone that has one likes it...but has no numbers to back it up. And the one guy that went to the track said it made him slower? any one have any more updates on this product?


Much thanks
Chris

 

yeha if that is true then what about my car im the one that did the testing for RVM and i did before and after dynos to prove it!

RVM PULLEY DYNOS

 

wow, it's pretty cool to find out that RVM pulley does something. I mean it felt way lighter when I held it in my hands, but after install I felt no difference........the addition of y-pipe, hi-flow cat, and b-pipe (all from budget) that's another story


PS thanks for the dyno graphs DaThrillr...

 

something is wrong with those graphs first of all there is just a tq spike but to me it looks like the red is lower than the blue but it shows the red as having higher numbers. Also what is up with the air fuel a perfect diagonal line

 

Search is not down.. i can search just fine

 

$20

 

the spike in the torque curve is from a down shift(automagic) .. we didnt know how to dyno the car on the first runs then on the after runs we figured it out so it was a smooth 3rd gear pull no down shift.....
\
the Air Feul meter was not hooked up that is y it was a perfect line.. RVM didnt see the need to have the air feul hooked up becuase the pulley wouldnt affect that..

i hope that cleared some confusions up.

 

Its still not working for me

 

really?

 

Yup its giving me this...

"You are not logged in or you do not have permission to access this page. This could be due to one of several reasons:


You are not logged in. Fill in the form at the bottom of this page and try again.
You do not have permission to access the page that you were trying to. Are you trying to edit someone else's post or trying to access administrative features? Check that you are allowed to perform this action in the Forum Rules.
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Logged in user: MaxSpeedSE [logout]

 

"][ 35"


well i have tested the car on the track with the new pulley...
didn't see much of a difference... may be it's that my ecu hasn't had time to learn the new pulley being that i only had it for like 3 days or so..... and i haven't gun it till i got to the track......







" ][ 35"



Quoted Message:
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Originally posted by Menacer
You said not much of a diffrence, so that means there was some difrences. Just curious if anything improved like trap speed, 60ft, times. If you did any WOT runs before you took your car to the track then maybe your ECU already made adjustments.
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ya to be honest with u.... my times was actually worse...
but like i said i didn't do any WOT run when i got it.... may be my ECU didn't adjust to it...... but i'm going to go again next week... and see... hopefully by then my ECU has adjusted to the new light pulley... and see some difference in time









"][ 35"



Quoted Message:
--------------------------------------------------------------------------------
Originally posted by Menacer
Did you reset the ECU when you installed the pulley? I think that it needs more time for it to adjust. But don't be dissapointed with your times. Lots of variables affect track times so who knows. Next time I go to the track I am going to do a couple of WOT runs to see if it helps. I run consistent 15.7s stock, so I want to see if doing this will help. Good luck next week.
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well i didn't reset the ecu when i got the pulley installed didn't think i have to reset it.... just thought that it will reprogram it self with new info from the lighter pulley.... definally lighter for sure..

ohh ur running 15.7 stock... i guess i don't have much to complain then... b/c stock i was doing 15.2 and with new pulley on i was doing 15.4.... hopefully next time i go to track i can see some improvement...... i can't wait till i get the ypipe ... i heard that that is the best mode to get the most extra HP other then force induction....

 

works for me.. so i guess its not down

 

$20

 

Works for me $20.

 

Why would the ECU have to learn anything with a lighter pulley. That is like saying the ECU has to get used to my ligher wheels. Does not make sense.

I don't think pulley's do anything for performance.

 

Yes it does. My car pulls noticeably stronger, especially when merging onto highway traffic. I got this mod after Frankencar intake, GReddy muffler, and Budget Y-pipe. I decided not to reset the ECU. It learned pretty quick. I have some more passing power on highway speeds now.

 

I hope there are noticeable gains. the dyno says there are and i just ordered one for $75.

 

I felt the most noticable gains in the lower RPMs. This low end gain would do nothing at the track but for the street it is great. The physics behind the gains are sound, lighter mass requires less energy to rotate. ~5 HP won't make much difference at the track anyway but for ~$80 dollars it is a fairly cost effective mod.

If nothing else, it's shiney

Search is only availible for donating members at the moment, read that giant annoncement at the top of every page.

 

So this mod wont improve your track time? Seems logical it will recieve gains I will try one for myself/.

 

yeah for 75 dollars its not bad at all

 

Just because I35 did worse doesn't mean it's the pulley's fault. He's only been to the track once since he's had it. That could've just been a bad day. It's a cheap mod. You're not going to feel your head jerk back from it but the increase in acceleration is noticable.

 

I'll ask again. Explain to me how the ECU needs to learn this mod.

It makes no sense.

 

I guess it's not so much as it learning but recognizing the smaller pulley. When I first got the pulley installed, I didn't notice anything right away. Believe me; I went WOT like 5 or 6 six times right after the install and dind't feel a difference. A couple of days later, the car started pulling harder. Thus, the ECU took some time to adjust to the smaller pulley. It wasn't instant. That's how I'm saying that the ECU recognized the new mod and the gains became more noticeable.

 

At WOT, the car operates in open loop mode meaning "learned data" is NOT used. Same thing when your car has not reached normal operating temperatures. Like I30tMikeD has said, it doesn't make any sense not only because of this but because of the part in question. Next thing y'all will be saying is that the ECU needs to adjust for the FSTB!

 

Hahaha.....that is not explaining how the ECU "learns" this mod. That is your butt dyno, expectations and imagination. What sensors are connected to the pulley that the ECU reads? Could you anwser me that.
This logic says that if I put on ligher wheels it will take time for my car to learn that the wheels are there. Do you think that makes any sense.

 

Hey. I've been here for a while before I even joined the org; so I'm not talking sh!it about this IMHO. I'm just going by what Cheston and the RVM people are saying. I didn't create this ECU "thing." I'm following what I was told. Go ask those guys about it. Ever since I've written about my expereince with this mod, I think I've been unfairly criticized. It's not as if this is that Ebay chip mod, or I created the pulley myself. I thought the ECU controls everything about the car? This pulley helps across the power band. When I go WOT (An increase from low RMP to high RPM) I can easily feel the new gain. Maybe I should clear it up. In the process of me going WOT, I see gains. Can you people call up RVM Racing or Unorthodox Racing instead of pivking on me? I'll be damned if someone goes off on me again.
It a cheap @ss mod with noticeable gains. If you want it, get it. If not, don't even worry about it.

 

Well said, Any before and after track times?


I cant belive no one has tryed to test it out at the track besides that one guy....guess i'll have to be the 2nd

 

Many people have gone to the track before and after a pulley install and none that I know of have run better times.

 

Man that sucks


When you say they havent ran better times...does that mean worse..or the same times as before?

 

I'll be going to the track in 2 weeks time, and I will let you's know...Pulley will be going in sometime this week..

 

Was I singling you out at all?? I wanted to know how the ECU has to learn this mod. I did not ask you, but you felt the need to reply, then you anwserd me with a non-answer. So don't get worked up that I lauged at you. I am not sayin that you don't get some kinda gains from this mod, that is not the argument. What I was saying is that it makes no sense that the ECU has to adjust to this mod in order to get the increase in Hp/tq.

Just think about it. A lightend pulley is reducing unsprung weight. The same weight that is reduced by going to a lighter wheel and tire combo. So according to this "relearning ECU mod" theory, when I go to the track next week and put on the ligher wheels and tires my car won't be any fast for a few days???

Your getting worked up because you could not anwser my question. Then why did you anwser me??

 

No decrease in ET that could not be explained by a better launch or weather.

 

Regardless of what people say about their timeslips with a UDP the simple fact is that every pound removed from the crankshaft is 2.7 HP.

The stock pulley weighs 5 lbs. UDP's average around 1.5 lbs. 5-1.5=3.5 lbs less. 3.5 x 2.7 = 9.45 HP available by that weight reduction. That does not include the reduction in HP buy underdriving which is minimal according the the UDP companies but you could probably average the overall HP savings in the 10-11 HP area.

Now that would be pretty hard to measure on the strip and also very hard to measure on a dyno after seeing the vast differences between pulls.

So regardless of what people who dyno say or those who test on the strip, the simple fact is that approx 10 HP is reclaimed by a UDP.

 

Woohooo!! And I just fixed up the one I got from ejj.............gotta get belts tho......parts plus has a Dayco brand that cross ref'd to the gates sizes.....

 

Only real way to find out if a UDP does anything is with a dyno. So far I know of only one person(dathriller or something like that)that did it. We need more people to get it dynoed(before and after pulley is best)to know for sure.

 

If a pully that could give up to 10 hp dosent show gains on a track...then whats the point of the mod?

Mods like Exhuast, and Intake, dont even give that much hp , and u can even see an imporvment with them on the track...im confused

 

I agree with you that the UDP will give a gain and that 5-10 HP will not be noticable at the track. I think the gain might be relitivly even across the RPM range but felt more at lower RPMs because it is a higher percentage of the power the car makes.

But, is there some formula to arrive at this 2.7 HP per lb number? Or are you just taking Unorthodox Racings word for it? I know in the fourth gen FAQ thread Eric calculated static weight reduction from a lighted flywheel, is there a similer formula for a lightened crankshaft pully?

I thik you mean rotating weight, unsprung would refer to weight not supported by the suspension. I agree that it would make no sense that the ECU would have to learn this mod. When I put mine on there was a small but definatly noticable difference right away. Still 5-10 HP across the RPM range is not likly to have a noticable affect on track times but as I mentioned I also noticed a nice low RPM power gain that is very usabe on the street.

 

UDP from UR...who are they?

 

I guess what I'm saying is that 10 HP is approx .1 in the 1/4 mile. Most people vary that much between runs so its hard to get hard numbers. I am not saying it doesn't make an improvement, it does, but one 10 HP mod may not show much but 3 or 4 of them will.

Its just that the increment is so small its hard to measure either on the track or on the dyno because of the natural variations between temp, humidity, difference in how driver reacts etc.

 

Alright I got it, thanks ...it was well said, i understand now