Big Cam 400 intercooler conversion

And you can't go off of that because you're pulling ten times the weight with 3-4 times the power. Even if you could find an electric fan(s) that would pull enough air, the added safety of the mechanical fan becoming stuck on vs the electric fan(s) being stuck off makes the electric ones not worth it. As big of a deal as fuel mileage is now, one of the OEM's would put electric fans on from the factory if it was a viable solution.

 

It's all proportional. Fan\radiator size is based on engine and HP rating. Even the company that makes the electric fans says they shouldn't be used for towing. That's a direct admission to capacity limits.

x2

 

Sounds like he's the one to ask then. Did he use the truck to haul freight? Over mountains? During the summer? I just caught the part in your other post about the fan hitting the hood, what on earth happened to it that made it hit the hood?

 

Roadwork a guy that I know did exactly that to a T800 he is using the intake from a N14 and change the fan to fit the slopped hood, and he is hauling butt.

 

Sorry, there is no way a 3406B intake will fit on a Big Cam Cummins. The N-14 intake might work maybe but if you could find an old intake from a 335 I think it would work. You might be able to use your existing intake if you can figure out a way to remove the cooler element and plug the holes where the water lines came out. You will still have to fabricate some kind of elbow to go from the manifold to the air-to-air cooler.
I used to know a guy that put a Cummins KT-450 in a 359, he had either 4 or 6 electric fans because of a clearance problem. He was in AZ and kept it cool, his biggest problem was getting the fans wired up right, he was melting wires because of all the amps the fans were drawing.

I just re-read this thread, it sounds like you already put the other engine in the truck? If not, wouldn't it be easier to sell the Big Cam engine and maybe the 3406 you have sitting around and use the money to buy an in-frame kit and 3 exchange heads and fix the engine that came with the truck? After you change it all around, and go backward with technology, what will that truck be worth if you ever want to get rid of it? I'm not trying to tell you what to do, I was just wondering, good luck with it whatever you do, I hope you can get it back to work soon.