Originally Posted by Countryboy8602

I tried them both out on 3 different occassions, 3 different dealerships, with the same configurations everytime (SCrew, 4X4, max tow with 3.73 rear ends, etc) and walked out with the 6.2 (Platinum).

On each test drive, with back to back identical highway cruising speeds (approx 25 mile round trip) I averaged virtually the same fuel mileage on the digital read outs.... 18mpg at 62 mph, 17 mpg at 68 mph, 16 mpg at 75 mph, give or take .5 mpg, with the same result between the 2 in overall average. Its clear to me the EB, when in a truck configured the same as the 6.2, will get very similar fuel mileage. Sure an EB with 3.55's, 3.31's etc will get better fuel mileage, so would the 6.2 but you can't get it in anything less than 3.73's, hence my theory on the difference in official "ratings".

The 6.2 gets a bad rap here with fuel mileage, mainly because everyone bases it on what a Raptor 6.2 gets with its standard 4.10 gear ratio, larger heavier tires and overall heavier, less wind resistant package/stance. I get an easy 18 - 19 mpg at 65 mph highway cruising, and have averaged 17 with about 20% city driving, 80% highway. Not sure what the EB sits at but this thing idles along in 6th at about 1500-1600 rpm while highway cruising. I've got about 4000 miles on the truck so far, so is it broken in yet? As far as towing goes, I've averaged anywhere from 7 - 11 mpg, dependant on the obvious.... wind, speed, hills etc. Looks as though its been proven that an EB will do no better than this while towing, and the 6.2 has the larger, 36 gallon tank option.... aka much better towing range. The 6.2 pulls the snot out of my 8000 lb (loaded) trailer with a family of 4, and didn't have a problem maintaining 50mph into a howling headwind up a long 7.5% grade, with no overheating issues.

This leads to the Chevy/Dodge Hemi/Ecoboost towing comparison video (9000lb trailer, up hill, full throttle)..... the EB whooped the other 2 off the line, including a 17 - 20 second(??) spanking of the Hemi. No doubt attributable to the EB's high torque at lower RPM's, but the Hemi was only 3 seconds behind the EB at the end of the race. Obviously the Hemi was catching up dramatically, and would have passed the EB had they not ended the test so soon. Not sure what that means but could it be attributable to twin turbo heat soak?

A few other things with the comparison that both the wife and I noticed.... The EB steering was a bit lighter and almost felt too "loose". The 6.2 steering was a little tighter, but still light. The 6.2 has an exaust note to DIE for, the EB sounds like a sewing machine on steroids. They both had incredible power and acceleration, but the EB had a real annoying lag/hesitation right off the bottom, everytime we tested it, not the case with the 6.2.

Sorry for the book. All statements above are based on my personal experiences and opinion. From what i've read here over the last few months the EB fan club can get a little sensitive, but........ just sayin.

PS - Hats off to Ford and the engine choices they have, and the overall F-150 package. I've always been a Chev/GMC guy, this is my first Ford truck and I would consider it so far the best vehicle I've ever owned.

Originally Posted by Wookie

I have a feeling the "turbo lag" that people are noticing is more a combination of the PCM not having enough miles on it like was mentioned earlier. And a delay programed into the PCM by Ford to make the motor seem smoother to drive. It is very similar to how my 05 with the 5.4 drove with a stock tune. I know for certain the 5.4 didn't suffer from turbo lag.

I now have 11k on my EB and I really don't notice a lag at all. I do notice the power drops off just before, during and after a shift. Which once again is due to tuning.

Originally Posted by Wookie

I now have 11k on my EB and I really don't notice a lag at all. I do notice the power drops off just before, during and after a shift. Which once again is due to tuning.

Originally Posted by NASSTY

One of my theories on why they limit the boost like this is so they aren't pushing the transmission to the edge all of the time.Upshifting at full boost would be pretty hard on the transmission after a while.FoMoCo has to warranty these transmissions so they have to try to make it outlast the powertrain warranty.By controling boost at different shift points it puts less strain on the transmission.

Originally Posted by NASSTY

I have a boost gauge in mine and when you're really getting after it trying to reach and hold full boost. The PCM is limiting the boost at different stages. Right after an upshift the boost briefly goes up to a hair over 15psi then it drops and holds at slightly over 12psi and then right before the upshift it drops to about 10psi and back up to 15psi briefly after the next upshift.
One of my theories on why they limit the boost like this is so they aren't pushing the transmission to the edge all of the time.Upshifting at full boost would be pretty hard on the transmission after a while.FoMoCo has to warranty these transmissions so they have to try to make it outlast the powertrain warranty.By controling boost at different shift points it puts less strain on the transmission.
Ask me how I know. OK, I just replaced the trans. in my Grand National last week.On my GN the boost is controlled from the wastegate actuator not the ECM so it holds full boost until you let off.I run 25psi with methanol injection and you need a good built tranny to hold up to that kind of boost.

Originally Posted by Shelby-GT-500

My EB runs great but my first tow to the rim in AZ there are several long 6% grades. The truck did great. It ran at between 2500 and 3400 rpm. I was towing about 8000 lbs. The temp was about 98. I was not paying attention to the engine temp as I had watched the ford vids. Near the top of the hill I got and engine temp warning. The computer gave a message that said it was reducing power to cool the engine. The next hill I took it easier but I did notice if I gave much throttle the engine heated up very fast! The fastest I have ever seen before. If I backed off the throttle the heat went down. These do need more cooling if you are pulling a load. Funny thing is this motor pulled better than any gas motor I have had in the past. Seemed more like the diesels I have owned in the past. Much lower rpm's!

Originally Posted by Wookie

Does putting the trans in Tow/Haul change the way the PCM dumps the boost?

Originally Posted by ajrothm

Yep we saw exactly the same thing on two of our Ecoboosts at the track last night...We datalogged this..... Spike to 15, drop to about 13, then drop to 10 at about 4500 rpms or so...... WE also notice that the throttle position only goes to 74% and drops to 64% at redline..... Lastly the ignition advance starts at about 30* and drops to 5* as soon as any significant boost is made....at 5* for most of the power band when WOT.... A LOT of safety is built into the tuning to keep head gaskets and pistons in these things...especially for 87 oct.

There is a TON of power and performance to be gained once these ECUs are hacked....

Originally Posted by Blue07STX

So, your the second or third person to mention an engine temp warning in the paste few weeks. Were you running 87 or 91/93 octane?

Originally Posted by ajrothm

Yep we saw exactly the same thing on two of our Ecoboosts at the track last night...We datalogged this..... Spike to 15, drop to about 13, then drop to 10 at about 4500 rpms or so...... WE also notice that the throttle position only goes to 74% and drops to 64% at redline..... Lastly the ignition advance starts at about 30* and drops to 5* as soon as any significant boost is made....at 5* for most of the power band when WOT.... A LOT of safety is built into the tuning to keep head gaskets and pistons in these things...especially for 87 oct.

There is a TON of power and performance to be gained once these ECUs are hacked....