Just bought a new F-250 with the 6.2 and I was surprised how slow the rpm's climb when I tap the pedal in park.. My V-10 flashes 3000 rpm with a tap of the pedal in no time.. This 6.2 is much slower. Anyone else notice this?

 

I would not do that to anything. The closest I came to doing stuff like that was breaking in flat tappet cams at 2500 rpm.

 

Ok, I guess I should say the 6.2 is not as responsive as the 6.8.

 

Could be and the fly by wire prolly ain't helpin

 

the fly by wire .. knows the transmission is in park...

plus the fly by wire is fully computer controlled. and will not let you damage the engine.

and the fly by wire is well known to be slow from idle to 3/4 throttle...

kick it in the butt and see.

 

It's something to do with park. The computer limits the fueling so you can't damage anything. I think it's 3000rpm it cuts out at? I can't recall exactly right now but you can drop your foot to the floor in park and the truck only revs to 3k(I think) and it gets there fairly slowly. It is in no way shape or form an indication of how the truck performs. It's a safety feature so morons can't rev the crap out of their truck in park.

 

I will add I found out because I'm a moron who likes to give my wife a little rev while in park if I'm waiting on her. She hates it. Lol. Done it to her for coming on 15 years so she can't hate it that bad. And it can't mess anything up to badly because I'm still daily driving the '03 f350 that I've owned and done it to for nearly ten years. No major issues with the drivetrain, all original, coming on 200,000m. I don't sit there and float the valves or nothing.

 

Years ago, no truck motor reved quickly. The heavy flywheel and rotating mass kept the momentum going to get loads over the hill. A aftermarket light weight flywheel in say, a mustang, will make it rev quicker. And a lot of people think it will help mpg, but it actually hurts a daily driver, because the car will decelerate faster when you let off the throttle, meaning you have to stay on the gas more.

I could see a v10 reving quicker, because even though it's got a longer, heavier crank, it's got 2 more cylinders turning it along the way, but that doesn't mean it is faster under a load. We have several v10 trucks in our fleet at work, and they pull good, but I can promise you, they will not outrun a 6.2. The 6.2 pulls just as good as them, even harder at WOT, but has to rev a bit more to keep the momentum going on hills. If the v10 had the same transmission, it would probably be a different story.

And like what has been mentioned, the computer is keeping the truck from reving quickly when not in gear.

 

Tune it!!!
Itll run like its supposed to after that.
Just did mine because of the same reason.

 

The 3V V10s governed P rpm also. The 6.2l has tons of lag in it, my dad complains about his all the time. When I drive it it annoys me too, I'm used to my tuned V10. though my V10 in stock form was not near as bad as the stock 6.2l. Stock it doesn't even see WOT until 4500+rpm. Ford did a poor job on the tuning IMO. The old man has over 7k miles on his 6.2l and hes ready for a 5 star tune.

 

I noticed that too. Just in park and it's configured that way so you can't rev up the motor to 6k unless your driving it. Once it's in drive it's fine.

 

If you damage your engine running it up to redline in park, you have bigger issues than your foot

It's the computer. Either emissions, or support for high-idle speed for accessories, or the fact that Ford doesn't want you to rev it to 5000+ and drop it in drive

As for "lag" - yeah, I'm so ready to tune my Taurus just because of that, it's not even funny.

 

[QUOTE=Krewat;16532469]If you damage your engine running it up to redline in park, you have bigger issues than your foot
Very true!

 

Revving an engine in park or neutral is not the smartest thing to do.

 

What does it wreck?