04-07-2017, 07:45 AM
I originally had a 903 v8 Cummins, it typically would get around 6-7mpg, your CAT is probably similar.
I'm very happy with the 8.3 / 6 speed, it has good power and will get 9+ mpg if there aren't headwinds.
I'm pretty sure mine is not quite stock, the is fuel turned up a bit and the timing advanced, I'm running a straight pipe (no muffler) as well. It does not idle with the same sound (sharper combustion knock) as my friends 300 hp 8.3 of the same year.
My coach runs right with him but weighs 5k-8k more and I'm towing.
Install boost and pyro gauges if you don't have them, I have only had to back out of the throttle a few times when going uphill in 6th with a headwind on a hot day; but not knowing could hurt.
I believe 1995 is the last year of the mechanical version, after that the electronics can add some complexity to a swap.
PM me if you have more questions, I'd be happy to share what I know.
Scott
I'm very happy with the 8.3 / 6 speed, it has good power and will get 9+ mpg if there aren't headwinds.
I'm pretty sure mine is not quite stock, the is fuel turned up a bit and the timing advanced, I'm running a straight pipe (no muffler) as well. It does not idle with the same sound (sharper combustion knock) as my friends 300 hp 8.3 of the same year.
My coach runs right with him but weighs 5k-8k more and I'm towing.
Install boost and pyro gauges if you don't have them, I have only had to back out of the throttle a few times when going uphill in 6th with a headwind on a hot day; but not knowing could hurt.
I believe 1995 is the last year of the mechanical version, after that the electronics can add some complexity to a swap.
PM me if you have more questions, I'd be happy to share what I know.
Scott
1983 38' Classic #007
8.3 Cummins, Allison 6 spd.
"Any other Way"