Underdrive Pulley

[sznurek]

Hi, I was just wondering if one of these are worth buying. I have read in a catalouge that it gives 5-37 hp, I'm sure its alot closer to the lower end. Can someone that has one tell me how they are and if they are worth it? Thanks.


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[Cottonmouth]

It doesn't "give" horsepower. It frees up some weight that your engine has to turn. This allows the engine to more efficiently put the power to the road. I havn't seen any dyno results from anyone who has installed one of these on their cars, so I am still skeptical. for the price of an Unorthodox underdrive pully ($300cdn) you could outfit your car with other parts that will net more gains. Save a little more and get headders or maybe a BBTB.

I would do pullies after I have done everything else. To me it seems more cosmetic than performance enhansing.

my $.02


<hr width=60% noshade size=1 align=left><b>Hyundai Club of Ontario</b>
http://www.geocities.com/cottonmouth_hco/
<img src="http://us.f1.yahoofs.com/users/2cdb67e4/bc/My+Car/Newsig.jpg?bcn3DY8AU068Hfh9">
<b><i>There is a very fine line between "hobby" and "mental illness."</i></b>

[JonGTR]

Spider performance "claims" 6-10hp on the dyno for those.<img src=/images/forums/snitz/eek.gif width=15 height=15 border=0> Even if it was 6, that's pretty good for $200.


<hr width=60% noshade size=1 align=left>2001 Hyundai Tiburon FX 5-Speed Cardinal Red <img src="http://www.plauder-smilies.de/devil/firedevil.gif">
Just bought it so there are no mods

Future mods:
Shortshifter
Cams
Ram Air Intake
Exhaust (headers->muffler)
BBTB -> IM

[Jonas666]

I have the unorthodox pulley. Yeah, it was a little pricey, but it was noticeable enough. I would say just over 5HP extra to the wheels.




<hr width=60% noshade size=1 align=left>2000 Red Tiburon SE /w Leather
17" TSW VX-1's /w Toyo Proxes FZ4
Custom CAI, Vibrant Exhaust, Underdrive Pulley
12" Kicker Competitions, Cobalt amps, MTX powered x-over, phoenix gold cap, clarion cd

[Cottonmouth]

I wanna see a dyno<img src=/images/forums/snitz/guns.gif width=33 height=16 border=0>


<hr width=60% noshade size=1 align=left><b>Hyundai Club of Ontario</b>
http://www.geocities.com/cottonmouth_hco/
<img src="http://us.f1.yahoofs.com/users/2cdb67e4/bc/My+Car/Newsig.jpg?bcn3DY8AU068Hfh9">
<b><i>There is a very fine line between "hobby" and "mental illness."</i></b>

[Rudy]

i wanna see a dino too. <img src=/images/forums/snitz/thumbup.gif width=25 height=18 border=0>


<hr width=60% noshade size=1 align=left><img src="http://63.102.174.92/rudy_mini2.jpg" border=0>
my car is yellow. ejipt@n2mail.com

[Brock]

Don't forget the negatives of underdrive pulleys!

Water pump, alternator, power steering pump, a/c compressor will all run slower than factory spec.

I know I wouldn't gamble on one.





<hr width=60% noshade size=1 align=left>05

[Jonas666]

Brock, and others -->

The negatives about your a/c and water pump not running factory spec are not a big deal, because the actual pulley isn't much smaller diameter than stock (as some are for other vehicles), the big change is just the weight. So the belts spin at most 10% slower, no big deal, but the weight is greatly reduced.


<hr width=60% noshade size=1 align=left>2000 Red Tiburon SE /w Leather
17" TSW VX-1's /w Toyo Proxes FZ4
Custom CAI, Vibrant Exhaust, Underdrive Pulley
12" Kicker Competitions, Cobalt amps, MTX powered x-over, phoenix gold cap, clarion cd

[fintile]

how much does a stock pully wiegh vs. the UOR pully?

[WytchDctr]

5lbs stock and .75 pds for the UDP. It was lighter than the box it came in.