Hi. I just purchased a new 2012 F250 with a 6.2 liter gas engine. I noticed on the Ford website that the engine has 2 HP ratings. 1) 385 @ 5500 with GVW under 10K. The second is 316 @4179 with GVW over 10K.

I guess i have 2 questions. 1 is why do they do this and 2 i got a 10K GVW option on my truck. is there a way i can tell if i have 385 or 316 HP and is there a way i can get the additional HP.


Thank you very much
Harry

 

looks to me that they are just testing at different rpms, thus different hp..prolly the same if measured at the same rpm

 

I second this ..... and I can't even imagine running my v-10 at over 3000rpm for any length of time it would probably handle it, but there are some other factors to consider mainly transmission and gear ratio, in my opinion with any engine when rated by manufacturer, HP is a marketing thing

 

Thank you guys. I appreciate the input. It is definitely a change from my 6.0

 

Harry I'm just curious but what is the redline on the rpm? How has the 6.2 worked for you so far? I'm gonna have to upgrade in a few years, I love my 6.8 V-10, but chances are when I go to buy I'll be getting an F-250 with the 6.2

 

I'm in the same boat. Got an 01 Ex V10, lots of miles. Thinking about getting a new F250 6.2. How does this truck tow compared to the V10 ?

 

As stated, it's the same hp, just taken at different rpm's based on GVWR (noise regulations, etc).

I've said this before in other threads, I miss my '00 V10 at times but mashing the throttle on my 6.2 quickly alleviates that. Between the gearing and the new trans, it's a monster. I hate the drive by wire system, the throttle response is what I miss most about my '00.

It has a nice tone to it too, video in the link below from the last Ohio meet of me pulling 15k up hill. By the way, it redlined I think around 6,000 rpm, I can't really remember, had to let off to shift, the hill was pretty steep.

https://www.ford-trucks.com/forums/1...nd-videos.html

 

The 6.2 is great so far. i only have about 250 miles on it. I traded my '05 6.0 in for it so we will see how it goes. I am looking forward to seeing what i can get for fuel mileage and longevity.

I was curious as to why they rated it twice. i didn't know if the gearing for the higher GVW was different therefore altering the HP.

The quality of the truck so far seems pretty good although i had a run-around with the dealer. i ordered the tow package but for some reason ford doesn't include a brake controller with the tow package. i think that is absolutely absurd. The dealer was great and gave me one after some lengthy discussion.....

The truck is SUPER quiet. ride is way better than my 05 F350 (i know lighter springs) there is tons of leg and head room.

I will try to keep up on here and keep everyone posted. I just hope i don't have problems like my 6.0

 

Actually, the engine in the higher GVWR vehicle has been derated, utilizing a different tune.

The assumption is that a vehicle over 10k GVWR is not a private vehicle, it is a commercial vehicle. A commercial vehicle spends a lot more time operating at full GVWR and the engine spends a lot more time at or close to maximum power output, when compared to a privately owned daily driver. The average commercial vehicle may tow a load 90% of the time, where an average daily driver like mine might tow 10% of the time. Because of this, the engine has been detuned to decrease the maximum power a little, which increases longevity when operating at higher loads.

 

you mean the 2012 don't come with the tow packedge and breake controller. Must be something with the 9900 GVWR. Mine came standard with both but I did get the 10,000 GVWR.

 

Redford,

First off let me say, prior USAF 90-94, Shaw AFB and some mobile COMM in the Gulf.

As for your assertion of a tune difference in the engines, most all of the threads indicate that the engines in both classes (under and over 10000 GVWR) are exactly the same. The threads explain the HP and torque numbers for over 10000 GVWR are a result of testing at a lower rpm.

Having said that the only proof of it is a thread involving a Ford Engineer. Would you happen to have any proof of the de-tune theory? I only ask so that as a new owner of a 6.2 I can finally know the real skinny.

Thank you, Sir.

 

No, I don't have verifiable proof. Why would a vehicle over 10k be tested at lower RPMs, if (as you assert) the engines are identical mechanically and in tune?

 

I'm with Redford on this one. Take a look at the HP/TQ ratings for the 6.7 in an F250 vs the cab/chassis. Same engines, way different tunes.

 

My truck has a GVWR of 11,200, and the 6.2 I have in it has not been detuned. Trucks over 10k GVWR have their performance figures taken at a lower RPM to meet EPA noise requirements (which is what I said above, which comes from the 6.2 engineer). They still have the same output at the higher RPM.

I see that Ford is now offering the 6.2 in a chassis cab model and it appears they're playing the same trick with the numbers on that as well, taken at a lower RPM to make the EPA happy...

Here is the engineers post confirming this:
https://www.ford-trucks.com/forums/9...ml#post8821026

https://www.ford-trucks.com/forums/9...ml#post8816247

 

great clarification! been looking at a 6.2 to replace my 08 when i decide its time.