5.4 vs 6.2 Liter Power

[BigJ]

Hah tru that! Thats the voice of expeience, right there

 

[The Tank]

Hah tru that! Thats the voice of expeience, right there

I saw a 05 Mustang GT with a Saleen blower and Saleen canned tune at WOT A/F go from 11.5 to 12.0 and start climbing before the dyno operator shut down the car. I had told that owner to check the A/F 2 months earlier. Most FI Fords are around 10.5-10.0 at WOT. My L was at 10.3 WOT after the tune.

 

[BentToast]

Guys, stop beating a :deadhorse:. Yeah, if a Toyota, Dodge, Chevy, Nissan or GMC pull up next to us, they will win. But! They dont have a Raptor.

 

[MarkT]

X2, but for slightly different reasons. To my knowledge, the pedal and butterfly valves are both closed loop systems. Each knows where it's supposed to be given the input voltage.

But in any case, tank is right. One of the easiest tuning jobs there is on setups like ours is to remap the pedal to throttle positioning table. In my experience some tuners will actually only do that, and charge a small fortune for it, sendin the customer home believing he just picked up 100hp.

To put it another way, consider that we have 0-100% movement in our gas pedals, and also consider that we have 0-100% power available from the engine.

Let's say the stock map tells the system to apply 5% power when the pedal is at 10%, then apply 15% at 20% and so on (just an example). Now let's say you get "tuned". The tuner remaps the relationship to look like 15% power at 10% pedal, then 35% power at 20%, and so on.

You go away believing you just picked up huge power because you're getting pinned to your seat when normally you'd feel lag, for the same pedal position. But in truth you have no more power than you did before; it's just being applied sooner, at the expense of having it available later in the pedal stroke.

In this truck, I believe this is part of what Ford did in the Off Road modes. Its a good thing off road. Not so much on road.

Pretty much every car on the road these days comes with a "non-linear" relationship between the gas pedal movement and the throttle opening... at half pedal you might already be at 3/4 throttle.

What Ford did with off road mode is to give us back linear throttle response for more control off road.... half pedal is half throttle. Which is why some people have said the Raptor feels "doggy" in off road mode.

 

[jesse]

offroad mode is EPIC...thats all i gatta say lol

 

[BigJ]

Speaking of which, someone double check me please.

http://www.svtoffroad.com/showthread.php?1641-2010-Raptor-Off-Road-and-AdvanceTrac-Modes-Explained

 

[MarkT]

Speaking of which, someone double check me please.

http://www.svtoffroad.com/showthread.php?1641-2010-Raptor-Off-Road-and-AdvanceTrac-Modes-Explained

I tried... but I got dizzy... :mrgreen:

Have to try again sometime but not right after running the Raptor hard for a few hours on some nice trails...

 

[vegasfergie]

Well I have to be honest, I wish I would have waited for the 6.2L. I actually stumbled onto the Raptor when I was looking for a truck and didn't know the 6.2L was coming out. Oh well. I love my truck, but a hundred extra ponies would be nice. I've owned a lot of trucks, and the 5.4 seems sluggish off the line. When it's up to speed it's not so bad. Also, in the sand I have to keep it revved. It just doesn't have that extra power on tap you would like to have. I've seen the Edlebrock blower kit, gut 6K is way too much to spend. Also, trading it in is not an option right now. I'd lose my ass on my trade. I'm going to try and be patient and see what new stuff for is putting in the Raptor. We know the new dash will have the tft display with cool off road screens for us. Also, I just read in Truck Trend that Ford offically annouced the Eco-Boost V6 going into the F-150 line, and that they were testing it in the off road only Raptors. Just lots of cool stuff coming down the pipe, and in a couple years trading up won't hurt as much.

In the mean time I'm enjoying the hell out of my truck! Love it every time I jump in it!

 

[MMC Racing]

Going from a 2006 FX4 with the 5.4L to a 2010 Raptor 6.2L, I have to admit that I wish the 6.2L had even more in it. It is a nice step up, but it isn't "OMG" better. If a supercharger kit comes out of the 6.2L, I'll be all over it.

 

[BigJ]

Great attitude fergie! And fair enough regarding your thoughts, and perhaps regrets.

In terms of the blower... assuming they've totally dialed it in for the Raptor specifically (a huge assumption), do you really think $6K is too much? I understand having to come out of pocket for it (rather than perhaps rolling into financing?) but look at it this way: how much under sticker did you get your 5.4 for? How much over sticker (or at sticker) would you have had to pay for the 6.2? Subtract those two numbers and I'm betting you'll come away with right around a $6k difference. To me, that's the best way to think on costs like this. Think on them in terms of relative differences, not global prices.

FYI I was told "officially" (we all know what that's worth) that the Eco-Boost will NOT find its way into street friendly Raptors. They're running it in the off road only Raptors to prove the motor is rugged; sort of an answer to the critics that say a turbo booster and/or a V6 are not up to "heavy duty" use.