Ultra S Unorthodox Racing Underdrive Crank Pulley

[Shades]

Other day I finally installed my new blue UR Underdrive pulley in, and I can say the gains were unexpected. The instructions (which were somewhat inadequate) said it would take 5-7 days for full hp gains, but I noticed there was already new piss and vinegar in the pro right after installation. The installation took about 2 hours, but I could do it again in probably 30 minutes now that I know my way around the pulley system better. Sorry, no real pics, but if anyone has questions on how to install one of these beauties, just pm, and I'll tell you all you need to know. (Like how to get the original pulley off of an automatic)

New performance like this definitely calls for a pelvic thrust! (hump)

 

[Rism]

Sweet im looking to invest in one. Where did you pick yours up? Also what RPM range do u see most ur gains in?

 

[birdy85]

how did you get the stoc belts off

 

[Shades]

I got mine from http://www.revolutionsmotorsports.com on clearance. (fast shipping too)

To get the stock belts off, first you gotta locate the tensioner screws (There's one hooked to the alternator, and there's one near the front of the engine, just under the highest pulley. They both look about the same, long brass bolt with mostly exposed threads.)

To get the one from the front of the engine, you have to loosen two red-painted bolts. One of them is the fastener bit on the screw, very easy to find just under the pulley. The other is the hinge that the pully hooks onto the engine block with. These aren't easy to loosen, and you'll probably hear some loud "CRACK" but crank em anyway till they're loose and the pully can move along the screw. Once these are loosened, you can just turn the tensioner screw until the pulley is loose enough for the belt to fall off.

The one on the back (on the alternator) is along the same premise. I don't remember the exact setup (my buddy took that side) you gotta loosen the fastener on the tensioner, and anything that keeps the part from moving along the tensioner's screw threads.

Pics would really help here, I know, but i don't got a digital camera

Oh yeah, and RPM range, I noticed the difference more in the lower RPM's... just above idle the most, but the gains stretch pretty well across it.

 

[A.V.MSP]

I want to get this pulley for my msp do you guys know if there is people running them with no probs cuz I heard the oil pump has probs or some thing like that.

 

[Shades]

I'll get back to you in 20K miles

 

[Protege_Speed]

Ok. So I bought my pulley. I haven't installed it yet but I wanted to see what I was getting into and I decided to take some pics at the same time. Look at these pics and see if they help with your how-to.

I got mine from http://www.revolutionsmotorsports.com on clearance. (fast shipping too)

To get the stock belts off, first you gotta locate the tensioner screws (There's one hooked to the alternator, and there's one near the front of the engine, just under the highest pulley. They both look about the same, long brass bolt with mostly exposed threads.)

To get the one from the front of the engine, you have to loosen two red-painted bolts. One of them is the fastener bit on the screw, very easy to find just under the pulley. The other is the hinge that the pully hooks onto the engine block with. These aren't easy to loosen, and you'll probably hear some loud "CRACK" but crank em anyway till they're loose and the pully can move along the screw. Once these are loosened, you can just turn the tensioner screw until the pulley is loose enough for the belt to fall off.

The one on the back (on the alternator) is along the same premise. I don't remember the exact setup (my buddy took that side) you gotta loosen the fastener on the tensioner, and anything that keeps the part from moving along the tensioner's screw threads.

Pics would really help here, I know, but i don't got a digital camera

Oh yeah, and RPM range, I noticed the difference more in the lower RPM's... just above idle the most, but the gains stretch pretty well across it.

 

[Protege_Speed]

More

 

[Roywhitep5]

i am also intrested in this mod. after you get past 5k miles and have no problems, i think i might get one. did you need new belts?

 

[Protege_Speed]

I hope there will be no problems. I did get the Gates belts but I haven't installed it yet. I will let you know how it goes.

i am also intrested in this mod. after you get past 5k miles and have no problems, i think i might get one. did you need new belts?

 

[upstop]

I want to know how gas milege is affected, What diamater the pulley's are (stock & aftermarket).

Were you able to swap it easy enufgh from under the car? I have only looked at it from the top of the engine bay and my thought was to pull the motor and the swap would be cake.

 

[viVid]

I have had mine on for at least 10k, if not 15k... no problems. I used Gates belts (highly recommended).

i am also intrested in this mod. after you get past 5k miles and have no problems, i think i might get one. did you need new belts?

 

[akhilleus]

I have had mine for 30k w/ a system. I have had some problems with my belts slipping but i have the silver unanodized version and i dont have gates belts, yet
Tightening may be required too. However i havent had any water pump, alternator, or ac problems. it does chirp a bit though, voltage drops are somewhat noticable too.

 

[A.V.MSP]

can you get gates belts from any auto zone or pep boys?

 

[akhilleus]

i think that their availability is limited. probably not pep boys, autozone could order them. Belt #'s are included with the pulley and are also on unorthodox's website.

 

[A.V.MSP]

thanks man you probably just saved me a few gallons of gas from drivin all over town like a dumb ass

 

[akhilleus]

no problem, how are the indiglo alt. and water pulley sets?

 

[A.V.MSP]

Im happy with them. no charging or overheating problems yet. Its been 90-100 degrees the past few days and drove the car extra hard to make sure that the water pump still wored just fine. Power gains are not spectacular but deffinately noticeable and in my oppinion worth the $, but ill take any little bit I can. Hopefully when I get the UR pulley it will compliment the indigos that much more

 

[akhilleus]

are they smaller than stock or larger? Do u have any slipping, alt. voltage issues?

 

[A.V.MSP]

the wterpump is the same size but the alternator pulley is slightly bigger. maybe a 1/4-1/2" biger. No charging problems, no overheating at all and it has been 90-100 degrees past few days including today. Headlights dont dim or anything. If you are running a system you might have charging problems but dont know for sure cuz I have the stock MSP one still.