Other thermostat is new. I have an electric fan on my radiator. The truck gets up to 195 around town. On the freeway, it stays cold because of the 3 core radiator. On the sniffer machine the truck gets up to 195 because it doesn't have any wind blowing through the hood. I would also like to add that when the truck is on the sniffer, I can here it off idle stumbling, it sounds like a misfire. What I am trying to do here is get the internal combustion temperature lower than 2,500 degrees by adding more fuel to the off idle cercuit. I think I'm going to try cliffs 1st recipe in his book. I'm pretty sure the hot combustion gas is worse for the motor than the low coolant temperature ( on the freeway), where it idles around 3,200 rooms. If I were to start at 0 mph and accelerate to freeway speeds gently, my air fuel gauge reads 17.2. All the way up to freeway speeds. I also have to take into consideration that the air pump blows air into the exhaust system. All I am trying to do add more fuel for my camshaft. My idle screws are like seven turns out. Almost all the way out. When idling in park. The air fuel also reads 17.2. The jets and rods are perfect for the carb. Somewhere in the idle channels and passageways , there is too much air. This carb was set up for a stock 350. My heads have higher compression because they are swirl port, the intake is an aluminum edelbrock performance series, and my camshaft is a medium sized cam . The motor is starving for fuel. Fuel filter is new. No clogs in the fuel system.
