thank you, now if Ford would release the pricing

 

Trying to get a better understanding of how the engineers think
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ROFLMAO.... when you find out....don't tell me!! That is scarry :0

 

it may be the 9th wonder

 

I was able to get a little more info on the reason why the 450 has been de-tuned.<O</O
I showed my Ford rep the flyer that was sent out to prospective buyers. Showing him the lower HP/Trq of the 450. He placed a call to his Ford Engineering rep to find out some more info as to why this was done.<O></O>

The Engineer told him that the 450 had been detuned because it could produce the same "equivalent" power as the 250/350 but at a much lower RMP due to the lower gears. So I guess the 250/350 and 450 must have close to the same HP/TRQ at the RW's, only the 450 does this at a much lower rpm. I think this may have also been stated by some of the other posts.<O></O>

Now just need to figure out how to increase the power a little.<?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><V
My Ford rep also said the pricing will be released on 12/11.<O</O
<O</O

 

Thank you 1968. I think thats what we all needed to hear! So basically, if the 450's 6.4 cranks out the same torque at the rear wheels at a lower RPM thanks to the rear end gearing. This will make it unnecessary to rev the 6.4 as high, thus allowing less wear and tear on it, and less wear and tear on the rest of the drivetrain componets.

Making sense here?

 

Sorry but no

 

maybe it has a completely different hp/tq curve that makes more torque down low and can't make as much up high. With a fatter curve the peak power isn't necessary. There has to be a better technical explanation than 'lower gears'.

 

Well, it made sense to me. I think Ford is going by rear wheel HP and Torque ratings. But I'll just sit back and watch you all fight over what's right while I keep my comments to myself. Carry on...

 

The way it was explained to my Ford rep was that the 450, using the lower gears, can stay in the same torque curve as the 350/250 even though it is rate with less hp/trq. Big rigs do the same thing to keep in the torque band, they use gearing. Other wise they would probably have the same HP/TRQ as a locomotive. The Ford Rep is still going to dig into this more, at my request. He seamed to be sure this was done via the computer, so there should be a way to increase the power back up a little if need be.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>

 

2 comments:
#1, hp and torque ratings are allways at the crank due to the obvious: you never know what is behind the flywheel
#2, large otr truck motors are rated in hp for various reasons. horsepower is more meaningful in determining performance.
thanks for letting a noobe chime in!

 

Try this exercise;
Take a Pinto and a Lincoln Town car, put a 460 V8 in each car. Which vehicle needs a heavier duty transmission, bigger universal joints, driveshaft and a heavier duty rear axle?

 

obviously the lincoln towncar, but why use a different 460?

My point was the 450/550 may have more area under the curve than the 250/350. Again, I am just brainstorming. In my opinion, the #s are just for bragiing rights as the 6.0 did the same amount of work for the past 4 years with 325/570 and the 7.3 did it long before that. The 6.4 may be able to do it a little faster, but we all know the trade-off.

 

Becuase Ford has to warranty the drivetrain.

Ford also has to provide a competive rated product to Dodge and GM in the F250 and F350, hence the need to have those engines "cranked up" a bit when they likely could have used the engine with the lower ratings across the board.

 

touche.....

 

Ford also has to provide a competive rated product to Dodge and GM in the F250 and F350, hence the need to have those engines "cranked up" a bit when they likely could have used the engine with the lower ratings across the board.
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Good point. The power on these LIGHT duty trucks is getting crazy. It is getting to the point where there needs to be training for some of these clowns to drive the weight these trucks are capable of towning