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Currently I am running a D1 procharged 383 LT1 setup in my 93 Camaro ran by a Holley HP unit and I am noticing that I am having a hard time keeping my coolant temps where I'd like them. Mind you, the problem is very minor as it takes about 45 minutes before temps to climb beyond 200 degrees. I have my fans setup to both run at 180 degrees and I am running a 160 degree t-stat. When sitting still my temps will actually go down my issue is when I'm cruising at about 60-70 mph where they will slowly, but surely, increase. I am running a CSR electric water pump and was wondering if switching over to a Meziere would help fix this issue (Maybe they flow a little more? Like I said my issue is very minor and honestly for how much I drive the car it is really not an issue but one of these days I'd like to take it on a trip lasting more than an hour one way and be able to trust it not to overheat). Now I would convert back to a mechanical as I know they flow way more at rpm but the 24x kit prevents this from happening. Surely I'm not the only boosted guy to run into this issue so I figured better to ask on here than to guess and be wrong haha. Pic for your viewing pleasure.
Currently I am running a D1 procharged 383 LT1 setup in my 93 Camaro ran by a Holley HP unit and I am noticing that I am having a hard time keeping my coolant temps where I'd like them. Mind you, the problem is very minor as it takes about 45 minutes before temps to climb beyond 200 degrees. I have my fans setup to both run at 180 degrees and I am running a 160 degree t-stat. When sitting still my temps will actually go down my issue is when I'm cruising at about 60-70 mph where they will slowly, but surely, increase. I am running a CSR electric water pump and was wondering if switching over to a Meziere would help fix this issue (Maybe they flow a little more? Like I said my issue is very minor and honestly for how much I drive the car it is really not an issue but one of these days I'd like to take it on a trip lasting more than an hour one way and be able to trust it not to overheat). Now I would convert back to a mechanical as I know they flow way more at rpm but the 24x kit prevents this from happening. Surely I'm not the only boosted guy to run into this issue so I figured better to ask on here than to guess and be wrong haha. Pic for your viewing pleasure.
Have you tried adjusting spark and afr for your cruising rpms? That can cool you down. What are your cruising rpms?
My air dam is indeed intact and functional and my AFRs at cruising are around 13.7 and my timing ranges from 25 to 30 degrees. My fans are also functional at cruise. As for restricted air flow, my intercooler is mounted in front of the radiator which I'm sure has to be imparting some sort of negative impact on the radiator's cooling capacity. I'm liking the idea of an additional fan as I could easily wire it to run with the first fan but I would like to try to find another solution (if one exists) first.
I am having the same issues. No blower but a 385" with CSR pump. My temp. does the same thing you are talking about. The temp. seems to climb when running at highway speeds. I am seeing 215-220 deg. on the highway. Everything is in good working order as far as fans, air dam, radiator. I don't really want to go back to a mechanical pump as this car see very little street time. Interested if the Mez. pump does any better. Good luck. Nice cars.
What is the condition of the coolant and radiator? If it were plugged up some internally, it would certainly limit the cooling system's performance. The system is bled properly?
What is the condition of the coolant and radiator? If it were plugged up some internally, it would certainly limit the cooling system's performance. The system is bled properly?
Engine just went in the car this spring. The coolant is new and the radiator is definitely clean.
I am having the same issues. No blower but a 385" with CSR pump. My temp. does the same thing you are talking about. The temp. seems to climb when running at highway speeds. I am seeing 215-220 deg. on the highway. Everything is in good working order as far as fans, air dam, radiator. I don't really want to go back to a mechanical pump as this car see very little street time. Interested if the Mez. pump does any better. Good luck. Nice cars.
Thanks! And yeah I was thinking maybe its a trend with the CSR pumps more so now as you are in my exact same boat (minus boost, but a moot point while cruising).
What coolant/water mix are you running? I assume you have nothing impeding airflow to the radiator? I'm running the Mezeire HD with no cooling issues. Stock radiator and fans. Can the Holley ECU cut power to the fans above a certain speed?
Holley HP ECU, it is set to run by coolant temp only.
Have you tried running them to turn off over 35 MPH? I'm running the HP ECU as well, but I went with a Hayden fan controller (I wanted to preserve my outputs for nitrous/boost control).
Even the 50gpm freeflow units flow LESS than stock at cruise on a car with 3.73+ geared vehicle.
They free up power by doing less work(moving less water) that simple.
Usually adequate, sure, but as we constantly see people buy them with no comprehension of the fac they are adequate and only a cooling "improvement" at idle when the system isn't taxed anyway.
I had a Summit pump on my car for awhile and even at 40F outside the car ran warmer at 75mph than at 35mph. Just a few degrees viewable through datalogging. That is in a Caprice which I bet is a little easier to cool, more open nose, stock vertical radiator, more room behind he radiator for air to flow away.
Electric pumps are a cooling system capacity DOWNGRADE for the sake of reduced parasitic loss and potentially cooldown with the engine off. Which is fine if people would understand that.................
As for restricted air flow, my intercooler is mounted in front of the radiator which I'm sure has to be imparting some sort of negative impact on the radiator's cooling capacity. .
The intercooler and Flow rating of the CSR vs a higher one from Meziere could very likely be the reason you see temps creep at fwy speeds
You may even see the same with a mechanical as the intercooler, like a AC cooler in front of a radiator, would impede aka restrict the flow of cooler air on the radiator
assuming your cooling system is functioning properly you could try a fan in front of intercooler and or a higher GPM flow EWP
06-02-2015, 08:11 PM
Electric Water Pump Cooling Issues 
