I'm putting it in a Chevy 3500hd which had a 6.5 turbo Diesel. I believe the engine redlined at 3250 rpms?? and horsepower and torque were a little more than the Isuzu @ 155hp? 275ft torque. Truck has a GVW of 15,000lbs weights about 8500 empty and will have about 3000lbs on it most of the time. So will be 11500 lbs most the time, I will occassionally tow a heavy dump trailer, and I live 1500 ft above sea level. There are some small hills around here, but most would be 60-70 mph freeway. Any recommendations would be greatly appreciated :idea:
I think you will be happier with a 6 cylinder, be it a cummins or an Isuzu.I have both, and while the 4 is fine for a flatbed with a couple of tons of material, the 6 is far better for towing a heavy load.Another bonus with the 6 is that overdrive 6 speeds for the 6 are available here, while the o.d for 4 is not (at least not readily) I think fuel mileage with an overworked 4 would be worse than the 6 as well. My two cents...
Thanks Coog , but I already have the engine. Dougal I don't know what the rear end ratio is but I will find out, the rims are 19.5" low profile type truck tires. I will measure. Seems to me if the Chevy reved to 3250 a little more than what the Isuzu rev's (3000 rpm 92% of chevy ) and the chevy trans (4l85e) had an overdrive, then I will need an overdrive also.
Is it possible to set it up for an overdrive for cruising unloaded to get the revs and fuel usage down, use the direct drive next gear down for heavier stuff.[/QUOTE]
That would be great! Glad to hear 4bd rev's higher than the Chevy did.I will measure tires and find the chevy's rear end gear ratio tommorow.