Forum Discussion
jeromep
Oct 29, 2021Explorer II
FloridaRosebud wrote:
So going down the engine upgrade, I seem to remember back in the late 1970's or early 1980's some company in Detroit took a Dodge 440 and punched is 60 over, stroked it 1/2 inch, and came up with 511 CI. On the dyno they measured, if memory serves, about 475 HP, and 550 ft-lbs of torque (with AL intake, 800 or 850 Holly, good cam). So I think your numbers are reasonable. Too bad the gas engine manufacturers can't come up with an engine like that for our motor homes...
Al
They have. The new 7.3 V8 from Ford is being sold as a crate engine from Ford Performance as a 600 horse naturally aspirated engine for performance and racing folks. It goes out the door in F53 and F59 chassis as a 350 horse 468 lb-ft torque engine. They pair it with the 6 speed automatic.
Then look at the same engine in the F-250 or F-350. It goes out the door with 430 horse and 475 lb-ft of torque. They down rate the engine for stripped chassis, oddly. The F-series is also mated to the 10 speed automatic, not the 6 speed.
That said, like the V10 before it, a number of third party modders are already developing computer adjustment tools which an end user can plug in to the OBD port to change engine and transmission performance. The right company with the right mod instructions can do tremendous things to an engine and transmission pair. I suspect there are already Class A owners with the new 7.3 which have gone to 5 Star or another company and are getting significantly improved horsepower and torque with nothing more than plugging in a device to the OBD port. I haven't looked, but I wouldn't be surprised if Banks hasn't already developed performance gear for the 7.3.
About Motorhome Group
38,718 PostsLatest Activity: May 03, 2025