Road Test of Stant vs. Shewman Thermostats

[bobH]

Old engineer's 'creed'... If you have something that is working well, and you try to make it better, if you screw with it long enough, eventually you will f**k it up.

I ran this same test several years ago, on another engine (the other brand, sbc350). It's a vehicle/engine that has always had overheating problems during the 40+ years that I've owned it. I got exactly the same results. Stock stat went back in.