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Thread: Cooling issue help needed....

  1. #1

    Cooling issue help needed....

    Looking for any advice to help with my cooling issues. I have a blown BBD in my 1964 Belvedere. I only have 6 PSI max boost with 28 degrees total timing (pump gas). I run a 2 row 31X19 split tank/ cross flow rad ( http://www.jegs.com/i/JEGS+Performan...52039/10002/-1 )with dual 12" flexalite fans ( http://www.jegs.com/i/Flex-a-lite/400/575/10002/-1 ), CSR waterpump and a high flow 160 thermostat. The car is fine driving down the road but as soon as I get stuck at a set of lights, the temp starts to creep up. I'll go till I hit 200 degrees then have to pull over, shut off the engine, and let the water pump and fan cool the car (2-4 min to get back to 150). Our outside temps here don't get much more than 70 degrees out side so its not like I am trying to cruise in Vegas. I'm thinking maybe to install a chiller under the blower to help, but not sure if that would even work... Anyone out there have any suggestions???? -Thanks!

  2. #2
    Since it runs cool on the highway, and only heats up at low speed or at a stop, it looks like air flow is the cause of the problem. Lack of shrouding around the fans is the most common cause of low speed heat.
    Rob

  3. #3
    Senior Member RACING JUNKIE
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    Quote Originally Posted by Robstclair
    Since it runs cool on the highway, and only heats up at low speed or at a stop, it looks like air flow is the cause of the problem. Lack of shrouding around the fans is the most common cause of low speed heat.
    Rob
    sounds about what i was thinking too you running a stat or re-stricter?

    i never had good luck with the split rads like that......
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  4. #4
    Senior Member DYNO OPERATOR
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    Cooling

    Do you have any restictions to air flow in front of the radiator?

    Air conditioning coils or trans oil cooler coils in front of radiator will reduce clean air flow thru radiator.

    Fans on back side of radiator pulling air thru, not on front pushing air?

    What pressure radiator cap?

    Losing any coollant to recovery tank?

    Antifreeze or straight H2O? Water wetter?

  5. #5
    Thanks for all the input. Heres some more info for you guys...
    -Air pulls through the rad
    -Water with a bottle of water wetter
    -160 degree high flow thermostat
    -front of rad is wide open with absolutely no blockages
    -Only shroud is the one around the dual fans
    -13 lbs rad cap
    -no coolant in the overflow tank

    One thing to note is that the case of the blower is polished and once the temperate starts to climb it will retain heat for hours....That is why I was wondering about a chiller.

  6. #6
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
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    I've had experiences where the coolant was going through the radiator TOO fast and not cooling ENOUGH, hence exponentially increasing temps. Installed a smaller restricter or higher temp thermostat and cured the prob.
    ops: ops: ops: ops: I have also installed the fans on the front and they were pullers and not pushers...... ops: ops: ops: ops: ops:
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  7. #7
    Senior Member DYNO OPERATOR
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    You need to put antifreeze in.

  8. #8
    I would love to run antifreeze but my daughter runs the car at our local racetrack and they don't allow antifreeze....

  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by Birddog95
    I would love to run antifreeze but my daughter runs the car at our local racetrack and they don't allow antifreeze....
    i ran just water with a couple bottles of water wetter in my last streetable ride and it stay cool just fine.

    you running an electric pump or mechanical? any pics?
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