I think it's time for an electric water-pump. That's the only way to hit mid 12's i think. I remember hearing a lot on here about some negative things about electric waterpumps, but i can't remember them. I was wondering if anyone had some opinions on them.

 

Both of my cars have a Meziere on them. Neither leaks, both run at about 180* and I've NEVER seen one's temp gauge go up past 210. Two thumbs up IMO.

 

Neg: Flows less then stock at HIGH rpms. Leads to overheating if kept there at a prolong time. known to go out without warning. (best to hook an LED to them)

Pos: Flows more at LOW rpms. Great if stop and go driving. I have my fans and waterpump running when car(and fan switch) running. Lets me cool it down a bit in the staging lane.

 

How does it get hotter at higher rpm's? This isn't an auto-cross car. I've heard all about the pressure in the water jackets and raising the boiling point-but i don't really know-what i believe and what i don't. Doesn't it flow enough........how high of rpms are you talking? 3grand, 4grand, 5grand??

 

The electric water pump doesn't increase it's speed, therefore its flow with an increase in engine rpm, like the stock mechanical pump does.....I'm not sure at what rpm the stocker will surpass flow of the electric.

 

I wonder how much more the stock pump flows compared to the electric pump up top.

Somebody should really research this........

42 gallons per/min free flow= wonder how much this flows in the car actually.

with my estimation at 3000 rpms the stocker would flow around 60 gallons(on the high side).....but as long as your radiator could cool it down quite a bit it seems you would be fine. I guess the only way to know is to install one and run it around 3000rpms.

anybody on here run there car with an electric water-pump around 3000rpms for an extended amount of time.....i am curious how much hotter it will get.

 

Yea i know it's cam driven therefore spins half rpms speed, but what i really was asking was what you said in the second part..........where the cam driven surpasses the electric pump.

 

Someone should design a belt driven pump for these things..........if it would be possible.

 

You can have too much flow from a pump, where it might cavitate and not flow at all...

My lt1 with a merziere, a/c running, and stock thermostat - the coolant never broke 210.

 

[QUOTE="White Knight"}anybody on here run there car with an electric water-pump around 3000rpms for an extended amount of time.....i am curious how much hotter it will get.[/QUOTE]


As am I....when I get the car back on the road with the new gears, I'll be turning close to that at 80, right? (not that its going to see much highway use)

 

I've been running them for years with no complaints....

I know with my 79 Z28 (LT1)... which has 4.56 gears & TH400, cruizing at 3200 RPMs it never runs hot at all & it has the "standard" duty Meziere. Maybe if you were to keep a steady 5000+ RPM you might have issues... but I doubt too many of us are doing that. The HD version of the Meziere flows about 55gpm & would most likely be fine even for constant high RPM use.

Generally speaking, my cars run cooler with the electric pump on the street & track

 

yea i'm thinking if you keep it around 3000 to 3500 that it won't run any hotter than a stock pump.......and like you said i don't know many people that hold 5 grand all day long........lol

I wish the Heavy duty pump would fit on the f-body

 

I guess if it runs too hot for my liking then i'll go get myself a Be-Cool radiator and drop the temp 20 degrees (They garentee)

 

Anybody know what has to be done to fit the Heavy duty version in a 4th gen f-body......if it's just trim the fan shroud then i'll do it, but it says "heavy modification" Anyone know first hand about this modification for the heay duty version?

 

How hard would it be to rig up a switch for the water-pump? Anyone done it before?