I had the same question. I want to do the pulleys and h20 pump as well. I think sleeper05 has both. Sleeper05 how do the water pump and pulley work together. Thanx for the help

 

You can use the eH2O pump and an underdrive crank pulley but you will need a slightly different length belt, this is the best of both worlds IMO and is what I have planned for my car.

 

i can't get the needle to leave dead center no matter how hard i drive the car now. i believe the meziere eh20 pumps 2-3 times as much all the time as the stock pump does at redline. install was a breeze once i figured out the wording of the directions. the gain in hp was not as much as pulleys alone originally were, but i could def feel it pull harder and reach redline quicker...it feels a bit torque-ier. you also have to get a shorter (99') belt, but thats not a problem. for LA traffic during the summer, i would recommend this combination. i believe brenspeed sells a combo kit that saves you a couple $$ because you don't have to buy the water pump pulley.

 

The only problem with the water pump now seems to be that if you blow a fuse or short it, you're screwed. Theres nothing you can do and you cant go anywhere. Isnt that correct.

 

I talked about this before. Adding a larger pully to the water pump makes it go slower. Same as when you put a smaller pully on a blower it spins faster. The larger pully is to take up slack so the belt hasn't got to be replaced.

 

Yes if you install an underdrive crank pulley and it's matching water pump pulley then you don't have to replace the belt.

What I was referring to was if you run an underdrive crank pulley (which is smaller than stock) and an eH2O pump (which has a stock size pulley) then you will need a slightly shorter belt because you don't have the larger water pump pulley to take up for the smaller crank pulley.

 

I was talking about where you posted where the larger pully on the water pump made up for the belt running slower and it really only makes it worse. It's just to take up belt slop.

 

You're right, I'm not sure what I was thinking when I typed that.

 

I know it wouldn't be quite as much of a gain in HP, but
does any company just make a Lightweight pulley set that
has the exact same diameter of the stock pulleys just made of
a lighter weight aluminum??

This alone will drop rotating mass and make the engine spin up
faster, yet not mess with rpms of the individual accessories.

 

That would throw off the balance of the engine...

JMO


Rex