Summer Water Temp Baseline?

doc540 said
It was a general statement and the advice given to me by slantsixdan.

I'll be more specific,

"....assuming the cooling system: water pump, water passages, thermostat, and fan are in good working order"

a custom radiator solves all early, shroud-less slant six cooling problems

Better?

Not really. You're still assuming you need some expensive, custom radiator. I cool over 400 hp made by an all iron, .060" over 340 with a $200, off the shelf Champion radiator. You shouldn't need any kind of custom radiator to cool a slant 6. Most plain old 22" 2 core radiators should be more than capable of handling most /6's, unless you've gone wild with engine modifications.

famous bob said
To keep this thread going, I have been playing w/ diff. fan configurations the last couple of weeks. I,ve had a 17" 6 blade steel factory fan / belt driven, a dual 14" elec. fan set up, a 17" 10,000 rpm flexfan, and a custom cut 10,000 rpm 17 1/4" flexfan. All the fans were bet driven, except the dual elec fans. There were not much diff. between them, the dual elec was probably the worst, (thinking the thin shroud was the big problem here) , the custom cut flexfan was probably the next best, the steel factory fan might be the best. I am thinking about a diff. water pump and thermostat now, both hi flow. I am not having real big problem but would like to run around 195-200 in the terrible heat we had yesterday.
my 505" WEDGE IS GUESTIMATED AT 723 H.P., alumheaded, w/ a 28x19 crossflow rad. , two rows of 1 1/4" tubes , that was (supposedly) guaranteed to cool 800 h.p. All fans have been in a shroud .
ARE THE FLOW COOLER OR MILODON WATER PUMPS WORTH THE money ? How about the best 180* thermostaty out there ??
------------------------ALL SUGGESTIONS APPRECIATED !!!!!!!!!!!

What is “terrible heat”, and what kind of driving conditions are you talking about?

You can probably skip the high flow thermostat, I’ve never had any luck with those. The high flow pump on the other hand may be a good idea. I run one, it works great with my 26” 3 core Champion radiator and Contour dual electric fans. You’ll hear different opinions on the high flow pumps, but you can pretty much disregard the whole idea of flowing water through the radiator “too fast”.

The dual electric fan set up not working as well probably had little to do with the shroud and more to do with the overall cfm flow of the fans. Generic, flat sheet metal shrouds though do give up some efficiency, but that’s a smaller effect than the cfm of the fans.