carringb wrote:
Grit dog wrote:
And a detuned 7.3 that is essentially not any better than the outgoing 6.2. The 7.3 has 35 less hp and 30 ftlbs more tq.
Yet you can get a full power 7.3 10 speed in a F550 or F600.
Heck, the Transits will even spank the E series RVs with an Eco boost and a 10 speed.
If you get a regular E series cutaway you can get a full power 7.3 though. Just the RV/bread truck options that get saddled with the inferior drivetrain.
Very well laid out towing guide though!
The Premium tune is standard on all E-series and the F53 chassis. This is the same calibration as the F450-F750. The "Economy" tune has to be selected when ordering and is only available to fleets. The 6.2L in the E-series was not dyo certified like the 7.3L is so the numbers shouldn't be compared directly.
The difference in tuning has to do with emissions certifications for the different chassis. There are different tiers and bins for each type of chassis or complete vehicle.
Also, even though the 7.3L is detuned, it is still a better choice than the 6.2L in my opinion. I know people chastised Ford for going with "old" pushrod tech, but they are considerably better in the low range than the "new" OHC engines.
For example, according to the crank dyno charts released by Ford, the 7.3l is creating 400 lb-ft at just 1,500 rpm while the 6.2L is creating less than 200 lb-ft at the same rpm which also means it is creating less than half the horsepower as well. In fact, the 7.3L is above 400 lb-ft from 1,500 to 5,500 rpm. The OHC 6.2L reaches 400 lb-ft at around 4,300 rpm and only holds it to around 5,200 rpm which is a very narrow window.
