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03-04-2012
got a zzp under drive water pump pulley for free with the purchase of my down pipe im debating on weather to put it on or not. to be honest i don't even know what they do.. can someone explain what the under drive pulley does, and if its even worth putting on its brand new
03-04-2012
how did you get it free with your down pipe?
03-04-2012
i ordered the dp on here and the guy was suppose to send an o2 emulator with it but he couldn't find it so he threw in the under drive pulley and new rear o2 sensor in for free so i got the under drive pulley and really have no idea what it even does
03-04-2012
its supposed to free up some hp as well as help with fuel economy. I know its a litter lighter then the stock pulley. I was actually looking into getting one for my car as well as a UD pulley for my alternator. I think with that pulley you have to get a bigger belt. If you put it on let me know how it works out
03-04-2012
ill let you know i need a new belt anyway so i might do it, and id have to say its definitely lighter
03-04-2012
i looked it up on zzp they said a 5.5 hp increase on a n/a engine and its a pound lighter and 1 size larger belt recomended doesnt say if its compatible with s/c cars i wouldn't see why it wouldn't be though ZZPerformance - Water Pump Underdrive Pulley #ZZ-WTRPUNDPUL
03-04-2012
yea I'm not sure about the s/c applications but i think it said somewhere if you get both UD pulleys that you need a size bigger belt
03-04-2012
yea ill have to do some more research or if someone on here has tried it or knows if its worth doing the work
03-04-2012
I ran same size belt and on a gtp
Android Fire
Originally Posted by TLSheff
03-04-2012
it might just be for the n/a motor then
03-04-2012
was it worth it did it make that much of a difference in hp or give you better gas millage?
03-04-2012
What it does is spin the WP slower which makes it easier for the motor to spin it. I haven't heard anything ill from running one, everyone's motor seems to run at the same temp. It works on either motor since the accessory drives are just about the same.
Originally Posted by TLSheff
03-04-2012
I have a Smoothflow one. They're made out of aluminum compared to stock steel. Also they are obviously larger, hence under drive. Me gusta.
03-04-2012
And if you decide you dont want it shoot me a PM if you wouldn't mind.
Originally Posted by TLSheff
03-04-2012
im gonna talk to my boy he helps me with all my engine **** and see what he thinks i should do if i sell it im gonna want like 55 or 60 shipped cause there 70+ shipping on zzp and mines brand new and i really could use the money for other **** for my car
01-28-2013
If you got an electric water pump would you need to worry about an underdrive pulley for it?
01-28-2013
Electric water pumps are a waste of money, save the cash and buy something else.
01-28-2013
So you'd suggest an underdrive pulley for the water pump instead of a flat out electric water pump?
01-28-2013
Nope, leave it stock. 95% of us never mess with under-driving or over-driving pulleys. There really is no gain in any of it.
01-28-2013
Well I'm looking for every little bit of power I can squeeze out of it so I'm gonna do one or the other.
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