89_C3500_Larry
Newbie
I have a 1998 c3500, motor swapped from a 350 tbi to a 454 with a demon 600. It's got a th400 with a 4.10 rear gear. The radiator has a built-in transmission cooler. Would it benefit me to add a fan driven external transmission cooler? I'm consistently towing 11,000 fully loaded and my transmission temps start rising quick after I get off the highway.
One other question about the carburetor. Is a demon 600 enough for a 454 tow vehicle? I average 5.5mpg loaded. 9-10 unloaded city. If I went with a larger carburetor, would it improve mileage? It seems like it falls flat a little at the top end when I go balls deep in the throttle. Would a bigger carb fix that?
One other question about the carburetor. Is a demon 600 enough for a 454 tow vehicle? I average 5.5mpg loaded. 9-10 unloaded city. If I went with a larger carburetor, would it improve mileage? It seems like it falls flat a little at the top end when I go balls deep in the throttle. Would a bigger carb fix that?
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