Thread: should i run my ZZP underdrive pulley?

I have a ZZP under drive water pump pulley i got it for free with my down pipe, im going to need a new belt soon and im not sure if its worth putting on it seams almost the same size as the factory (a lil bigger) but its defiantly lighter then the factory. Im not sure if i should put it on and buy a one size larger belt because im gonna need a new belt anyway, or should i just sell it and spend my money on something else? Its brand new, does anyone have one? If so is it worth putting on, and what benefits do you get? So what do you guys think is my best option if its not to big of a gain i could use the money to spend on something else for my car. Its a 97 GTP.

not worth putting on.

there's 2 belts on a GTP you know that lol the water pump is on the main drive belt so dropping pulley sizes wouldn't have an effect on the belt size for the main drive

When i put mine on i didnt need a new belt. Stock belt works good. It seemed to help my car rev easier and a tad of extra pull from down low.

If you have it already, its worth it. Here is some info on it: Easy Performance | ZZP Underdrive Water Pump Pulley Testing

thanks for the info

I like mine, I have a Smoothflow though. I haven't had any kind of issue with it running warmer than before the pulley.

Originally Posted by Fivefingerdeathpunch

not worth putting on.

Really guy? Why? Why is it not worth putting on? It's been PROVEN to give you about 5hp and about 5 ft-lbs of torque? He got the damn thing for free, it takes 15 minutes tops to swap it out. So WHY is it not worth it?

Cause it's a piece of junk... which I will gladly take off your hands for free so it's not taking up any space in your garage.

lol its small its not taking up any room in my garage

put it on guy. no worries its a small gain but it all adds up

Originally Posted by matt5112

Cooling > 5 chp.

My thoughts exactly.

Originally Posted by Bio248

My thoughts exactly.

Because you're really losing that much wp efficiency by using it?

Aren't u the same guys that advocate the use of a stock t-stat?


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i was thinking about getting a colder tstat preferably a 180 deg. i herd of people with 160's whats the down fall or better for a 160 opposed to a 180?

Go 180... 160 is too cold and your heat in the winter will suck. The only reason you should even run a 180* is if you're bumping timing or dropping pullies. If you're stock, then don't even bother.

Originally Posted by RooK

Go 180... 160 is too cold and your heat in the winter will suck. The only reason you should even run a 180* is if you're bumping timing or dropping pullies. If you're stock, then don't even bother.

i have taylor 8mm plug wires, slp cold air/ram air setup, 2.5 catless dp, plog, glasspack, stock mufflers, soon to have new plugs and drop pulley size after i figure out what size to go with