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  1. Nate S

    Should I be concerned?

    Always a good idea but the factory gauges are usually good. Also if it’s in a “believeable” range while driving and on cooler days going really high probably means going really high.
  2. Nate S

    Should I be concerned?

    Assuming the engine isn’t some crazy race engine (and even then) a common reason for running hot I’ve found has been non-functional vacuum advance or some variation on incorrect advance. What’s your distributor setup like? What port on the carb is the vac advance hooked up to? Does is work? Is...
  3. Nate S

    Cooling for 67 Charger 383

    Are you using vacuum advance? That can be a factor. Efficiency goes down notably without it and where does the extra energy go? Heat.
  4. Nate S

    Radiator Thoughts

    Actually not correct. The higher flow makes it turbulent instead of laminar, heat transfers better. They don’t put high volume water pumps in for nothing.
  5. Nate S

    Removal of heater core, 64 Polara

    The repro heater cores are very close but not exact. Expect to do some mild drilling and alterations to get it to fit. Nothing to lose sleep over.
  6. Nate S

    383 pulley question

    A/C cars had a little pulley on the water pump, made it spin faster. Doesn’t really work without A/C though. Used a different groove.
  7. Nate S

    26" Radiator that came in my real V-code 70 Roadrunner. ID help please!

    You have a lot of company with the “frankencar”. 50 years in the hands of “car guys” is a long time. Even the “numbers matching” cars often are not original parts, just appropriate numbers.
  8. Nate S

    Cooling system, wits end

    Also worth noting that a fresh build will run hotter for a while until it’s really broken in.
  9. Nate S

    Cooling system, wits end

    For starters I think you’ve done well already. Keeping it as cool as it is already in that ferocious heat is an accomplishment. Any of the rest of us would be high giving each other high fives because our “hot” days are 95 or similar. No such thing as too much flow. The faster it goes the more...
  10. Nate S

    Bypass heater core

    There would be no harm in putting a valve in. Doesn't matter what side, essentially the same pressure either way. It would help with the interior heat. The older cars had that valved and I find them to be more comfortable on hot days.
  11. Nate S

    Using the best coolant?

    I wouldn't mix. The color is an indicator of the corrosion inhibitor type. We know for sure you can't mix with NOAT so any claim that it can mix with anything sounds like BS.
  12. Nate S

    Using the best coolant?

    Right. That’s what I was talking about. “Efficiency“ in this case is how much of the fuel is converted to work instead of heat. Higher compression = higher efficiency = more mechanical work for the same fuel. This means less heat created. (100 Joules in, 25J in work all else is heat. If 30J out...
  13. Nate S

    Using the best coolant?

    The combustion temp is indeed higher. Net heat out is lower (with higher efficiency / compression) Reynolds number below 2000 is laminar. 2000 - 4600 transition and above 4600 turbulent.
  14. Nate S

    Using the best coolant?

    As part of my day job I deal with cooling systems for lasers. The video posted earlier in this thread references anti-corrosion technologies used over the years. This doesn’t have much to do with the actual anti-freeze medium. In most coolants this is either Ethylene Glycol (toxic) or Propylene...
  15. Nate S

    Using the best coolant?

    That makes sense when I look at individual pieces. When I back up to the system perspective though, I see less fuel going in (higher efficiency) and therefore less total heat going out. If the burden on the cooling system is greater, then the other heat-out conduit, the exhaust must be notably...
  16. Nate S

    Using the best coolant?

    As Bob states, there’s a reasonable difference between soft water and distilled. There’s much less between deionized water and distilled. Soft water comes from a self refreshing doohickey in your house that starts out looking like a DI resin bed but uses salt to refresh and you never really get...
  17. Nate S

    Using the best coolant?

    Bob, I like your post and agree with most of it. Question though. As compression increases, efficiency increases. This means more of the energy in the fuel goes to power and less to heat. What’s the mechanism that would drive more heat in the coolant when less total heat is available? Certainly...
  18. Nate S

    22" radiator

    Those specs wouldn’t cause me concern in regards to heat. Hmmm
  19. Nate S

    22" radiator

    Are you using vacuum advance? What’s the timing set at? How big is your cam? Any idea what centerline it’s installed at? Those seems to be big drivers of engines making heat that’s tough to get rid of.
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