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Underdrive Pulleys??

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Old Nov 23, 2009 | 10:05 PM
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Default Underdrive Pulleys??

So i was thinking about getting UD pulleys for my ws6, i have full bolt-ons so far and it dynoed at 353,374 im looking to get alittle more out of it, what are your guys opinions on these, such as 10%, 25%, brand, problems and potential power gains...

Thanks,
Anthony
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Old Nov 24, 2009 | 06:34 AM
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Try a search, this question pops up everyday...25% underdrive pulleys free up around 7hp. Seems worthwhile to me.
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Old Nov 24, 2009 | 06:56 AM
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its alot of money for a small gain, but at some points that's all that's left.

as long as you don't run a big stereo system, you should be good to go with an UDP.

i threw my belt once in 7yrs of driving....
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Old Nov 24, 2009 | 09:15 AM
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Default THE best price!!!

Theres a sponser on here that sells the 25% Powerbond (reboxed SLP, with high retaining walls for no belt slipping at all) new bolt and both belts for like 199.99 bones + shipping, and ive done alot of research on prices for those latley, this is the best offer around, some folks want more for their used ones vs. this price without the bolt and belts.
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Old Nov 24, 2009 | 12:18 PM
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what sponser is that
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Old Nov 24, 2009 | 12:47 PM
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pm sent (i dont know if i can post that info without getting into trouble, some folks on here get mad pretty easy, and thats not what i want to do )
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Old Nov 24, 2009 | 12:56 PM
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Originally Posted by Bad Blue WS6
pm sent (i dont know if i can post that info without getting into trouble, some folks on here get mad pretty easy, and thats not what i want to do )
Shouldnt have opened up the can of worms then to begin w/
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Old Nov 24, 2009 | 01:00 PM
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i know. but it is nice to help others on here out, i know i always get tons of it from folks ive never met.
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Old Nov 24, 2009 | 01:17 PM
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Originally Posted by Bad Blue WS6
i know. but it is nice to help others on here out, i know i always get tons of it from folks ive never met.
Ditto
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Old Nov 24, 2009 | 01:25 PM
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what is the trade off when switching UD pulleys? where does that extra hp come from i guess is what i'm asking
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Old Nov 24, 2009 | 01:28 PM
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If it's a sponsor there's no reason not to post it up. I didn't post any thinksgiving specials up this year, so here's one. I'll honor the above mentioned price for any of you guys
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Old Nov 24, 2009 | 01:39 PM
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YEAH! he's the one!! That is the best deal around, hands down. Thanx for postin up, and i didnt want to be spreading the wrong info, thats why i didnt post it. Im still waitn for my wife to give me the ok to spend the $, i may have to buy a suspension piece before i make another purchase,,, damn vibrations in my car, im HOPEING my pinion angle is the culprit, we;'ll soon see.

Wayne
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Old Nov 24, 2009 | 01:39 PM
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Originally Posted by Scoggin Dickey
If it's a sponsor there's no reason not to post it up. I didn't post any thinksgiving specials up this year, so here's one. I'll honor the above mentioned price for any of you guys
200 for everything? How long is the deal?
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Old Nov 24, 2009 | 01:44 PM
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Originally Posted by hlaalu
what is the trade off when switching UD pulleys? where does that extra hp come from i guess is what i'm asking
They reduce rotating mass and speed of belt driven accessories. The result is a more responsive engine that revs faster, but doesn't produce any more power than it did before.
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Old Nov 24, 2009 | 01:45 PM
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Damn hlaalu!!! nice pic you got there in the middle,,!!!!!
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Old Nov 24, 2009 | 01:58 PM
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You don't really gain any hp, you just lose less. And by the way,The SLP UD pulley I had on my car was just as heavy as the factory crank pulley.
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Old Nov 24, 2009 | 02:05 PM
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Originally Posted by MonmouthCtyLS7
200 for everything? How long is the deal?
$199 + shipping for the Powerbond underdrive pulley, both new belts, and a crank bolt. I will get this deal updated on pricing on the website ASAP. For now, just give me a call and I'll get any of you guys set up

Jesse
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Old Nov 24, 2009 | 02:10 PM
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That's a kick *** price!
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Old Nov 24, 2009 | 02:24 PM
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Its worth it, I wouldn't worry about the hp gain though. It allows the motor to rev quicker and spins all accesories slower(longer bearing life) Don't worry about charging, most of the time I'm sure your near redline....

I have the slp works great and is a bare metal color

My buddy has the asp one and its black if you prefer that color

I think they are all 25%

If you have an auto the smaller pulley is slightly easier on the tranny, It allows the motor to be pulled down easier between shifts, and with its ability to rev quicker you get a little more stall.

+1 for buying the pully.
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Old Nov 24, 2009 | 02:32 PM
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Originally Posted by hlaalu
what is the trade off when switching UD pulleys? where does that extra hp come from i guess is what i'm asking
I've see nothing but benifits from when i did mine. The power comes from not having to spin all the acc. as fast as before. You can almost think of it as being in 1st gear vs 2nd gear. Its a mechanical advantage. HP isn't much different between gears, but the acceloration is greater with a lower gear.

Most people will be concerned about chargin issues, but usual most people get different gears anyway IE. 3.73's or 4.10's. This allows the motor to be at higher rpms at cruising speeds, so the alt. is able to spin high enough the meet the requirements of the elec. system.
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