So it would be wise to go with the 1.25” tubes?
Whats the main benefit of the 1.25” over the 1” tubes? Just more flow?[/QUOTE
Yes, more flow. IMO, you are always better off with the most flow you can get and let the thermostat set the minimum operating temperature. With the correct fan you should be able to drive through hell on a hot August day and not move the needle above where the thermostat opens, or very much anyway.
Also before I forget...you want the water pump the turn faster than the crank. I’m about 6% overdriven and Id like to get to 15% over or so if I can find the pulleys.
At 6% over on 100 degree days my temp stays at 170 all day long. It goes up about 5 degrees if I get stopped by along train or a stupid long stop light. That’s as high as it ever goes.
I suspect that if I had the pump turning faster it wouldn’t gain any temperature even waiting for the railroad to hump 20 cars.
