I've always thought that the intertwined manifolds of the Stovebolt engine result in the intake being heated by the exhaust. So I did a little measurement this morning (30 deg outside). (Forgive me; I like this kind of stuff.)
After driving around to get it fully warmed, I stopped and measured the manifolds with a remote temperature sensor.
Exhaust manifold at the 2nd port = 353 deg
Intake manifold at the carb = 184 deg (by chance ~same as my thermostat!)
So these accessories might be neat but they might not be necessary. I still wish I snagged that one at the junkyard.
I'm not hoping for 25 below to repeat the measurements!
Last edited by Wally / Montana; 03/06/2017 11:59 PM.
1948 3/4-Ton 5-Window Flatbed Chevrolet 34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.