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2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs

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Old Sun, October 11th, 2009, 01:40 AM
bustintheirazz bustintheirazz is offline
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Default Engine Load Percentage
On the Gryphon, one of the options is an Engine Load percentage. Im not sure if anyone has played with this at all, or viewed it as your driving, but I figured I would try it out. So, everything seems to be fairly accurate until you are fully accelerating. When I am at 100% acceleration, the guage is reading 78-80%. Does this mean I still have 20% power remaining in the engine that is not getting fully optimized? Or is 100% load not equal to 100% acceleration? Maybe an outside mind could resolve this for me?
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Old Sun, October 11th, 2009, 09:34 AM
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Quote:
Originally Posted by bustintheirazz View Post
On the Gryphon, one of the options is an Engine Load percentage. Im not sure if anyone has played with this at all, or viewed it as your driving, but I figured I would try it out. So, everything seems to be fairly accurate until you are fully accelerating. When I am at 100% acceleration, the guage is reading 78-80%. Does this mean I still have 20% power remaining in the engine that is not getting fully optimized? Or is 100% load not equal to 100% acceleration? Maybe an outside mind could resolve this for me?
I'm sure Bill can, not sure of anyone else's "outside mind". I imagine you are seeing the effect of a torque reduction strategy though. Possibly, to reduce strain on the transmission? But, I'm only guessing.

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Old Sun, October 11th, 2009, 11:01 AM
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Mine on canned level 2 acts the same as you state, empty.

I saw 92 ~ 98 % once when I pulled out on the 2 lane 70 mph speed limit country road and smushed the go pedal to da floor loaded with 2 round bales + 500 lbs of alfalfa cubes on the trailer and 500 lbs of corn in the bed.

IIRC 1st & 2nd were around 80 %, 3rd TC locked was 94 ~ 99%, OD was around 75% max, any more pressure on the go pedal caused a downshift.

I did have my trans shift firmness set higher wot shift points higher and some other things adjusted through the custom options menu.
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Old Sun, October 11th, 2009, 10:49 PM
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Like Jack stated before about the torque reduction stratedgy is probably a good reasonable assumption.
The other thing I will add is that with an automatic tranny with the fluid and clutches makes it harder to get a true read out or estimate.
A truer more accurate one could be done with a manual tranny.

Lars
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Old Tue, October 13th, 2009, 12:22 AM
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You may want to read this document. It explains why "full throttle" isn't always 100% Load.

http://dygytalworld.ehost-services139.com/php/Downloads/load_calculation.pdf

Take care.
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