UDP's, are they worth it?

welchspro · Post by **welchspro** » Fri Dec 01, 2006 10:43 pm

hey everyone, its bout that time to change the belts and i was playin around with the idea of gettin a new underdrive pulley. Just wondering if they have any real affect, are they worth it? Any negative aspects to em? Just thought i'd get some feedback from people who have em before i throw down money on one! thanks!

JRM · Post by **JRM** » Fri Dec 01, 2006 10:48 pm

http://forum.2gn.org/viewtopic.php?t=60 ... dp&start=0

Dark-one · Post by **Dark-one** » Fri Dec 01, 2006 10:48 pm

its a waste of money save your funds and build a turbo kit or something.

Marthby · Post by **Marthby** » Fri Dec 01, 2006 11:16 pm

yes, it is very worth it. it doesnt "produce" horsepower like say a CAI, exhaust, cam, etc... would. it just "frees-up" horsepower lost to drivetrain/parasitic loss, something that a crankscraper would do. i can honestly say that i was MUCH happier spending the $110 for my MPx UDP than $210 for my AEM CAI. The power increase i felt from the UDP was more noticable than the one i got from the CAI.

bad04srt · Post by **bad04srt** » Sat Dec 02, 2006 12:06 am

thats because all a cai does for our car is look pretty.....our stock airbox, while hideous, is actually very effective

welchspro · Post by **welchspro** » Sat Dec 02, 2006 5:21 am

Hey guys, thanks for the input so far, its lookin a lil mixed so i thought i'd help out by narrowing this topic down. my car is an automatic...so i'm not sure how effective it would be hp wise if i got an udp. My main concern is just decreased performance of my accesories. so any input on that front would be great! thanks again!

kc2005ptgt · Post by **kc2005ptgt** » Sat Dec 02, 2006 12:10 pm

a UDP will help free up that hp - it is a great mod for our cars, and one of the best since our crank pulley weighs about 2 tons.

I compared my UR Pulley next to the stock and the difference was phenominal - sorry I have no exact weights anymore been too long and I do not want to give out 'false facts'.

What do you mean by decreased accesories? Like alt/ac? Bah, no they will not decrease at all. My AC is friggin cold and when I replaced my 4 yr old battery with an Optima Redtop, and then popped on a voltmeter all checks out fine. been a year and no problems or decrease. I would not worry about it.

Of course what Dark-one said is the best route to go. Personally, with all the money I have spent on my car I could have bought a turbo kit now. So, yeah, best route to go.

Marthby · Post by **Marthby** » Sat Dec 02, 2006 1:21 pm

You have an automatic? Me too and the UDP realy livened up the revving throughout the whole rpm range. Best economical mod for any car ESPECIALLY an atx.

quicksilvr · Post by **quicksilvr** » Sat Dec 02, 2006 1:46 pm

Marthby wrote:You have an automatic? Me too and the UDP realy livened up the revving throughout the whole rpm range. Best economical mod for any car ESPECIALLY an atx.

Having heard that several times, I would second the idea. UDP on an automatic car is a great bolt on upgrade.

welchspro · Post by **welchspro** » Sun Dec 03, 2006 3:19 am

Sweet! Alot of good info. Thanks alot, guys! sounds like a pretty good deal, i'll look into it. Thanks again!

scneonchic · Post by **scneonchic** » Sun Dec 03, 2006 1:40 pm

I have heard also, that the UDP is a better upgrade than the 60mm TB.

fixitmattman · Post by **fixitmattman** » Sun Dec 03, 2006 2:14 pm

For $$$ spent vs. ass dyno gain, it's probably one of the best mods to start out with.

MarkGetsIt · Post by **MarkGetsIt** » Sat Dec 23, 2006 3:30 pm

i'll looking into getting one as well, but i was told that i'm not going to have enough power to run all my tv's, the sound system, and the air ride compressor... it sounds like it'll be another good bolt on but i'm just worried about my car dying on me

zandifam · Post by **zandifam** » Mon Dec 25, 2006 11:17 am

I would agree that it's a better bang for the buck than a throttle body. As long as you don't go crazy with an aftermarket stereo it's hard to go wrong. I've had no charging problems.

seisephiroth · Post by **seisephiroth** » Mon Dec 25, 2006 6:13 pm

if your worried about your stereo dying then get a capacitor and call it a day. UDP + ATX FTW

danman132x · Post by **danman132x** » Tue Jan 02, 2007 12:46 am

Does the computer glitch (misfire code??) occur with 03's as is does with 02's? At least from what I read...

kc2005ptgt · Post by **kc2005ptgt** » Tue Jan 02, 2007 12:53 am

no, just the 02

BlackRoseRacing · Post by **BlackRoseRacing** » Tue Jan 02, 2007 6:29 am

^^^
Agreed, just the 02's at high revs...

danman132x · Post by **danman132x** » Tue Jan 02, 2007 12:33 pm

Alright sounds good. Might have to pick me one up one day. Should work with the NGC since it's not "adding" horsepower, just freeing some up.

kc2005ptgt · Post by **kc2005ptgt** » Tue Jan 02, 2007 1:01 pm

danman132x wrote:Should work with the NGC since it's not "adding" horsepower, just freeing some up.

NGC is a myth, much like Loch Ness Monster and Big Foot/Yeti. No one has yet given ANY proof (like dyno) of NGC controllers actually restricting any modifications hp gains.

neon angel · Post by **neon angel** » Sun Mar 18, 2007 6:35 pm

ok i just got an udp for free from a guy he said the box is marked for a 95-99 neon will it still work on a 05 neon?

Post by **racer12306** » Sun Mar 18, 2007 6:41 pm

pretty sure it wont. if you check out modernperformance.com you will see there are some differences between the two.

t vago · Post by **t vago** » Sun Mar 18, 2007 6:51 pm

Well, assuming no changes between the 2000 and 2005 model year crank pulleys...

You might could drive your alternator with the 1GN UDP, but you'd lose your power steering and your A/C (if installed). This speculation is driven off of my examination of a 1995 pulley and a 2000 pulley.

Post by **racer12306** » Sun Mar 18, 2007 6:58 pm

modern separates the pulleys into 95 - 99 and 2000+ so i would assume all first gens and all second gens are the same in that respect.

EmersonHart13 · Post by **EmersonHart13** » Sun Mar 18, 2007 7:29 pm

UDP on my ATX was a great mod, especially because I bought it second hand for way under $100...

neon angel · Post by **neon angel** » Sun Mar 18, 2007 8:44 pm

i got it for free from a guy whose was going to put it on an srt but then wrecked his srt he sasi it would work so just checking

gilly02le · Post by **gilly02le** » Mon Mar 19, 2007 12:10 am

neon angel does the udp use the same type of belts for both the big and small portion of the pulley.. as far as i know, the 95-99's use a 4-ribbed belt for the alternator, and a v belt for the power steering and ac.. could be wrong tho...

Adionik · Post by **Adionik** » Sun Apr 08, 2007 12:08 pm

I'd like to pick on up if they're as good as everyone professes. I have 2 twelves in the back. I hope my subs will power fine.

No alternator problems?

kevin_2003neonSXT · Post by **kevin_2003neonSXT** » Tue Apr 10, 2007 6:35 pm

is it a pretty easy mod to install??? the pic on modernperformance shows that if you turn the wheel and take that plastic piece inside the wheel well out you can see the udp... so is it pretty easy to change???

Demonik · Post by **Demonik** » Tue Apr 10, 2007 7:34 pm

so is the big gain from lost hp from the pulley weight being significantly less than stock, or from it slowing down everything?

which leads me to another question...i dont think i can really get a udp since my stereo is sucking way too much power....so if weight is where alot of the power is coming back from, is their just a lightway pulley available?