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Recent content by dkmc1

  1. dkmc1

    Auto cooling systems

    I have to point out the specifics of my question. 1. No part of my question involves corrosion and the side effects of using plain water. 2. No part of my question concerns freeze protection. Yes, the pressure cap does raise the boiling point. Good point. BUT are the cooling systems...
  2. dkmc1

    Auto cooling systems

    Thank You. This pertains to current production cars. Not trying to "do" anything other than to understand if the systems are sized with enough capacity to permit straight water to provide adequate heat transfer. Or is coolant needed to raise boiling point.
  3. dkmc1

    Auto cooling systems

    Are today's auto cooling systems able to function with straight water as coolant under all conditions including full load at full output? Or are they designed so as to require chemical additives to prevent boil over? I'm hoping to hear from an auto engineer thats intimately familiar regarding...
  4. dkmc1

    Minimum Speed of screw air compressor for proper lubrication?

    What are the consequences of operating a screw air compressor BELOW it's minimum RPM as stated by the OEM? We have an IR screw compressor that has an operating range of 1400-2500 RPM It was operated at a lower RPM....possibly in the 800-1000 rpm range for less than 5 minutes. At one point it...
  5. dkmc1

    Riveting questions on Metallurgy....HELP

    I've got job to make Rivets....... Thin wall, 7/16 OD of flange X .379 Body OD X.305 ID. The material spec was 1010. But it's a turned part, so I offered 1018 as 1010 is not available in bar, just sheet, strip or plate. 1018 was accepted as a substitute. Problem is, when they are flared they...

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