Aug-11-2021 02:48 PM
Aug-14-2021 06:56 AM
Aug-14-2021 04:19 AM
Aug-14-2021 04:17 AM
Aug-13-2021 07:58 PM
2112 wrote:wing_zealot wrote:I can't see only a transmission having much of a noticable affect on engine braking performance unless it shifts to a higher engine rpm at a given speed. If they shift to a similar ratio and the convertor is locked, the results should be the same. There may be technology or engineering improvements at play.2112 wrote:It’s night and day different with the 10 spd transmission.
I…Engine breaking is not an EcoBoost strong point….
I can say when I tap my brakes the 1st time my rpm jumps to 26-2800. Tap it again and it jumps to a little above 3000, maybe 3300.
Aug-13-2021 04:14 PM
mooky stinks wrote:
The rig in my signature “engine brakes” better than any gas tow vehicle I’ve had including GM’s 5.3, 6.0, and 6.2. BTW my 5er weighs 10K lbs so it’s not exactly light for a 1/2 ton.
Aug-13-2021 11:24 AM
Aug-13-2021 06:22 AM
wing_zealot wrote:I can't see only a transmission having much of a noticable affect on engine braking performance unless it shifts to a higher engine rpm at a given speed. If they shift to a similar ratio and the convertor is locked, the results should be the same. There may be technology or engineering improvements at play.2112 wrote:It’s night and day different with the 10 spd transmission.
I…Engine breaking is not an EcoBoost strong point….
Aug-13-2021 05:41 AM
Aug-13-2021 04:27 AM
BenK wrote:
On a gasser, it is just pumping losses from having to turn (crank) the whole drive train faster without fuel.
Therefore, bigger gasser engines has more mass to 'crank', will have more engine braking.
Of course, the diff & tranny gears plays. As lower gears (higher numeric) will try to force the engine crank to spin faster (the rotating mass is forced to turn faster)
A tiny displacement ECO will not have that much mass to force and will not provide as much resistance as a larger displacement.
Aug-12-2021 06:33 PM
2112 wrote:It’s night and day different with the 10 spd transmission.
I…Engine breaking is not an EcoBoost strong point….
Aug-12-2021 05:04 PM
Aug-12-2021 01:19 PM
Aug-12-2021 11:42 AM
Aug-12-2021 11:20 AM
Groover wrote:
Due to frontal area I would expect you to get around 9mpg at 65-70mph. There are probably some people here actually pulling a similar trailer that can tell you they are getting. Most people with a camper that size are only pulling occasionally and the Ecoboost will be great for that.
Aug-12-2021 09:22 AM