I have had a Meziere 42 GPM water pump on my N/A sbc forever & our home track is Las Vegas, NV. In the heat of the summer when getting to the pit the car would reach 180* max.

Now that I'm supercharged in the heat of the summer with no changes to the cooling system, I'm at 190* - 195* when returning to the pits. It also seems to take a little longer to get the temp down when returning.

I'm considering changing to the Meziere 55 GPM pump for better cooling. I know more isn't always better when dealing with GPM. They do recommend this pump for supercharged, turbocharged & high compression engines. What do you guys think about the change?

2BKING

Some are going to disagree with me, but you can't circulate water too fast in a cooling system....also, a t stat isn't there to improve cooling, it's there to keep the engine at a predetermined temp, and are not needed for most racing applications.....I run one because it's so hard for me to build and maintain heat in the engine since I'm on methanol. The old wives tale that it keeps water in the radiator longer to cool it better is total bs, because it's also keeping water in the block longer picking up heat.....However, I'd also look at the size of your radiator, because system capacity is a big deal on cooling. Too small of a radiator won't transfer enough heat to the atmosphere....perhaps a larger radiator with your current pump might be the ticket....but then again, I wouldn't worry that much about that temp unless it continues to rise and won't cool back down....

^^^^^^^ Coloradoracer knows.

I run a small radiator. It's a 17"x19" core. Brodix half fill 2000C block. I just bought a triple pass radiator the same size to replace my old one. They claim 15% better cooling. The water will still flow the same speed in the block but have to zig zag through the radiator. Will it help? I guess I'll find out in a few weeks at the first race.

I agree with most everything Coloradoracer said and I also run a thermostat. I run one to help build heat in motor faster (I run alcohol) and help keep temperature at desired temp. Also agree that an electric water pump simply can not move water too fast. Maybe a mechanical pump but not an electric one my opinion.

Now I do run a Maziere remote pump so I have drilled 4 - 1/8" holes around thermostat to let air escape and always keep some water moving.

I would add that I have a thermostat on my fan and have it set to kick on when it gets hot enough.

Now I usually do not turn it on unless I am dealing with an idiot that will not stage and wants to play silly little games. Then I relax, flip the fan switch on and let him get stupid. They can go full retard for all I care I am not going to overheat and will still be in my temp range. They do those things to get to you and get you out of your game plan so be prepared and do not let them get to you.

quote:

Originally posted by TheBlueTruck:
I run a small radiator. It's a 17"x19" core. Brodix half fill 2000C block. I just bought a triple pass radiator the same size to replace my old one. They claim 15% better cooling. The water will still flow the same speed in the block but have to zig zag through the radiator. Will it help? I guess I'll find out in a few weeks at the first race.

I've been looking at the triple pass radiator. It would be interesting to hear your results.

2BKING

quote:

Originally posted by B KING:

quote:

Originally posted by TheBlueTruck:
I run a small radiator. It's a 17"x19" core. Brodix half fill 2000C block. I just bought a triple pass radiator the same size to replace my old one. They claim 15% better cooling. The water will still flow the same speed in the block but have to zig zag through the radiator. Will it help? I guess I'll find out in a few weeks at the first race.

I've been looking at the triple pass radiator. It would be interesting to hear your results.

2BKING

Just a thought but wouldn’t a triple pass radiator or same do ensionhave same cooling capacity as a single or double pass? Just thinking you have the same amount of cooling area so the only difference is water is moving slower through the tubes in a single oass than say double pass so it can cool just as much.

For the most part speed of water moving through radiator is determined by the water pump and thermostat if you run one.

More surface area and water volume in radiator will help cooling efficiency.

I'm pretty sure I'll change to the 55 GPM pump, but will talk with Meziere to get a recommendation.

2BKING

Only time i ran a T stat was in the early 80's with Crower stack injection on alky. Even with the t stat on a good day it was 145 tops. Change the procedure up a little bit if you can. Go in the water at a lower temp. I never believed the t stat theory either. Proper radiator sizing. I don't drive mine back. Waist of fuel

Confirm the pump is working, and fatten up the idle circuit. Also 190 to 195 isn't really HOT imo, it's warm.

quote:

Originally posted by Curly1:
For the most part speed of water moving through radiator is determined by the water pump and thermostat if you run one.

More surface area and water volume in radiator will help cooling efficiency.

when you change to a triple pass the same size as a single pass the speed of the water through the tubes will increase proportionately to the reduction in parallel paths for water to flow. All you have done was basically create three smaller paths for water to flow that are three times as long.

We do not recommend triple pass rads with electric pump. Just to restrictive. If you are using -12 coolant lines steping up to larger lines and ports will help flow more coolant. And yes the more flow the more coolant going through the rad the quicker it will cool down.

#1 issue racers have with thier cooling system is AIR in the system.
Call and talk with me or Don Meziere before you buy another pump.

quote:

Originally posted by 1leg:
We do not recommend triple pass rads with electric pump. Just to restrictive. If you are using -12 coolant lines steping up to larger lines and ports will help flow more coolant. And yes the more flow the more coolant going through the rad the quicker it will cool down.

#1 issue racers have with thier cooling system is AIR in the system.
Call and talk with me or Don Meziere before you buy another pump.

Thanks 1leg! Your name is Jerry, right?

I'll call this coming week.

2BKING

1leg = Jerry

Bob

quote:

Originally posted by RPROGAS:
1leg = Jerry

Bob

Thanks Bob!

quote:

Originally posted by B KING:

quote:

Originally posted by RPROGAS:
1leg = Jerry

Bob

Thanks Bob!

Bob is right!

Big thanks to 1leg (Jerry at Meziere Tech) for the informative phone conversation this afternoon. We are holding off on the 55 GPM pump for now. He did recommend installing a recovery tank to replace my catch can. I'm working on finding the one I want & fit with minimal fabrication.

2BKING

Thats really not that HOT - the engine need to get to at least 190 to burn the yuck out of the oil.