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  1. Gerald Morris

    Radiator Core Support

    I like SOME coolant volume in a radiator, but suggest the most crucial variable on a radiator is the radiant surface area. Now, if you refer to the AIR VOLUME at a given instant into which that radiant surface radiates, then yes, a greater volume of air (or any other fluid, liquid or gaseous)...
  2. Gerald Morris

    Radiator Core Support

    What do you have in 22" rads now? Curious and maybe interested.... I like the extra space the smaller radiator gives me up front, among other factors. Mind you, Gertrude stays nice and cool with my system. Cooling the tranny fluid separately BEFORE running it into the cooler at the bottom of...
  3. Gerald Morris

    Radiator Core Support

    Check THIS one out: OER MB2384A https://www.speedwaymotors.com/OER-MB2384A-1966-69-Mopar-B-Body-426ci-Hemi-V8-Rep-Radiator,133767.html I'm strongly tempted to snap this one up. I only hesitate because for now, my antique radiator works beautifully, and isn't leaking. I would rather have...
  4. Gerald Morris

    Auto temp 2 :(

    YES! I would seriously consider replacing the old vacuum controls for one of these systems entirely with modern, electronic thermostatic controls. Mind you, that's a little bit of engineering, but if I were afflicted with a '70s auto AC, that's the path I would take if much of the old system...
  5. Gerald Morris

    Robertshaw part number 335-195 thermostat?

    Mr Gasket still knocks off the 370 series, good for our B/RBs. I tried two. They do alright for a season, but that's all. The Real Deal works MUCH better. Small stuff like sticking to old specs makes a big difference.
  6. Gerald Morris

    Robertshaw part number 335-195 thermostat?

    The 335 RobertShaw stats are good for the /6. I copped a few, probably a lifetime supply for moi. That 1983 motor is very well designed, with the earlier quirks like the spark plug tubes gone. I suppose a forged crank would be a small improvement for some apps, but I run mine on whatever low...
  7. Gerald Morris

    Radiator Core Support

    Yeah, 17" is as big as one can do on those 22"x 18" radiators. I've looked at them, or the option of placing two smaller ones on if one can optimize the surface area covered beyond the PI*(8.5")^2 from the 17. Now, do you run that fan full time, or use a thermostat for the duty cycle? I use...
  8. Gerald Morris

    Radiator Core Support

    I'll concede that an all electric cooling fan system with a proper shroud for it definitely will cool the entire radiator better than any pusher. I use a pusher only for heavy urban traffic, when/where I'm not too impressed with mech fans even with the proper shroud, hood gasket, et cetera all...
  9. Gerald Morris

    Radiator Core Support

    I use the mech puller fan only in hot weather. It's an 18 inch, 2.25 inch pitch 7 blade Mopar clutch fan running w a 1965 shroud. When running at speeds over 35 mph when the ambient temperature exceeds 100F, this fan cools things well, BUT, as an urban dweller, I seldom get such driving...
  10. Gerald Morris

    Radiator Core Support

    Yes, test every step or method I recommend. Omni, get a better temp gauge than Equus. Autogauge makes reliable stuff for the $. Get that early 70s 7 blade clutch fan by next summer. You can get by w a cheap A Team 16" electric for the winter, IFF all else is in good order. DO attend to...
  11. Gerald Morris

    Radiator Core Support

    Stick with the 22" bro. If you have the $, go to U.S. Radiator, and get one of these: Chrysler Newport, 1966-69 V8 383/440 Radiator - US Radiator OR, try one branded from OER like...
  12. Gerald Morris

    Heat issues

    Thank you Dave for providing the CORRECT rendition of that abbreviation.
  13. Gerald Morris

    Heat issues

    Try this: https://www.mymopar.com/downloads/servicemanuals/1969_Plymouth_Service_Manual.zip Its a free 1969 Plymouth Service Manual. The Fury should be in it, which is a C body vehicle. I strongly suspect your switches and heater will be identical to what is shown there, though I might be...
  14. Gerald Morris

    Heat issues

    Regardless of where a load resistor would be placed physically, we can TEST the circuit for basic functionality. Given the dearth of freebee documentation for a lot of this stuff, that helps. Here is how I would test for "sanity" in a simple resistance regulated MoPar heater blower motor...
  15. Gerald Morris

    Heat issues

    You might want to remove the switch and clean it well. Find the FSM for 69 C bodies, and see how to remove the thing. The old FSMs help enormously with this stuff. Get one now. MyMopar has free ones you can download. Good quality contact cleaner helps me revive all sorts of old electric...
  16. Gerald Morris

    Lower the temp for next summer.

    Very likely, since its a non-Mopar one. Mine is a 2863215 Mopar 18" 7 blade, 2.25 inch pitch fan, very common in the early 1970s. I only use it in the summer. I scored it at our neighborhood junk yard for $20. You might find one like it, or the 2863216 fan at 18.5" w a 2.5" pitch on ePay...
  17. Gerald Morris

    Lower the temp for next summer.

    Straight fans DO cool well! Mind you, at high rev's, they load the engine a bit, but my first summer running the 383 I yet use I ran a 6 blade rigid fan with that 2524894 radiator without any overheating. I still have that old treasure, in case I get another body and engine to get moving on a...
  18. Gerald Morris

    Lower the temp for next summer.

    It WAS! Read the FSM. Look a little familiar there? Hmmm?
  19. Gerald Morris

    Lower the temp for next summer.

    Never mind the terminology of amateurs. The RobertShaw was THE thermostat for ALL Mopar B/RB blocks, and the earlier A block engines too. HIGH FLOW IS GOOD FLOW! That stupid **** about restricting the flow to let coolant sit in the same damned spot for long periods will destroy your motor...
  20. Gerald Morris

    Lower the temp for next summer.

    XLNT! I need to do likewise, as both of mine are very old, and leaky. I can only patch so much. I figure I'll get US Radiator to furnish a new core, and plan on adding another row, but retaining 9/16" spacing for better air flow. This matters a lot. I realize if I used the high efficiency...
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