Hesitation
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Joined: Sep 2016
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From: Oswego NY
Hesitation
Test drove a 2017 F350 with the 6.7 , first diesel I've ever driven. The motor is very response once moving but there was a very pronounced hesitation if you gave it full throttle from a standstill. Is this normal? Is it just protecting the driveline from the massive torque?
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From the videos I've seen, the lack of power for nearly 2 seconds is way more than one would expect from a turbo spooling up. It seems to be computer limited to me. I would expect the torque to be limited when the converter is still slipping significantly, but the power reduction seems more dramatic than I would expect.
On a related note, I've heard about limited torque in 1st (DRW) or 1st-3rd gear (SRW), but haven't seen anything official about this. How sure are we that this is the case?
On a related note, I've heard about limited torque in 1st (DRW) or 1st-3rd gear (SRW), but haven't seen anything official about this. How sure are we that this is the case?
Cargo Master
Joined: Dec 2003
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From: Central MO
I didn't see a lack of power for near 2 seconds at all. My 6.4L? Sure, it has plenty of lag, but the '17 6.7L has almost zero lag in the one I drove. Just a simple roll into the pedal from a stop and it was off, leaving unintended black marks on the pavement behind me. I didn't punch it, just eased into it and saw almost no lag.
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If you turn off the traction control, any difference?
I had the same issue on my diesel F250 2013.. I was never able to quite nail it and make it a sports car, but I did notice a difference with traction control off.
I had the same issue on my diesel F250 2013.. I was never able to quite nail it and make it a sports car, but I did notice a difference with traction control off.
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From: Oswego NY
Thanks for the replies. Not expecting to accelerate like my Z06 just thought the 2 second hesitation was more than normal Turbo lag. Once up to speed it was awesome
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Test drove a 2017 F350 with the 6.7 , first diesel I've ever driven. The motor is very response once moving but there was a very pronounced hesitation if you gave it full throttle from a standstill. Is this normal? Is it just protecting the driveline from the massive torque?
Posting Guru
Joined: Oct 2005
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Don...I don't think he's trying to compare cars and trucks of different speeds and models, he's just asking about the hesitation from the jump. It has been mentioned several times on here already...from guys that already drive and have driven all years of diesels in these trucks. I'm curious when I get mine how it will feel. After driving every Ford diesel since the 7.3, many..and I mean MANY on here can feel the difference between NORMAL turbo lag and maybe something else going on with the engine/transmission. Just my 2cents.
Post Fiend
Joined: Apr 2004
Posts: 5,158
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From: North of Salt Lake City
I've driven two of these now and it is different from my 2011. The 2017 accelerates similarly but it does feel a little restrained. Pulling like a freight train is a good way to describe it. Solid, linear power that just keeps pulling. It's so quiet it's deceiving. I couldn't even hear the turbo which I'm not sure I like. Will kind of miss the wheeeeeeeeeeeeee sound at full PSI.
As to the lag, there is none in my estimation. You just roll the throttle up and the truck responds instantly. If you stomp the pedal to the floor, it's like the truck says, "OK THEN" and stands to attention. Then the power hits and the truck takes off. This is the difference between rolling into the throttle vs. stomping the go pedal to the floor. That's my take.
As to the lag, there is none in my estimation. You just roll the throttle up and the truck responds instantly. If you stomp the pedal to the floor, it's like the truck says, "OK THEN" and stands to attention. Then the power hits and the truck takes off. This is the difference between rolling into the throttle vs. stomping the go pedal to the floor. That's my take.
Posting Guru
Joined: Jul 2011
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From: Corpus Christi, TX
I've driven two of these now and it is different from my 2011. The 2017 accelerates similarly but it does feel a little restrained. Pulling like a freight train is a good way to describe it. Solid, linear power that just keeps pulling. It's so quiet it's deceiving. I couldn't even hear the turbo which I'm not sure I like. Will kind of miss the wheeeeeeeeeeeeee sound at full PSI.
As to the lag, there is none in my estimation. You just roll the throttle up and the truck responds instantly. If you stomp the pedal to the floor, it's like the truck says, "OK THEN" and stands to attention. Then the power hits and the truck takes off. This is the difference between rolling into the throttle vs. stomping the go pedal to the floor. That's my take.
As to the lag, there is none in my estimation. You just roll the throttle up and the truck responds instantly. If you stomp the pedal to the floor, it's like the truck says, "OK THEN" and stands to attention. Then the power hits and the truck takes off. This is the difference between rolling into the throttle vs. stomping the go pedal to the floor. That's my take.
Hotshot
Joined: Nov 2013
Posts: 10,107
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From: Hempstead, TX
Part of the delay may also be in the programming to allow the VGT to move to get the turbo spooled before dumping fuel. If it just started dumping fuel as soon as you nail it, you would quickly fill the DPF and have more frequent regens. When tuning, this is adjusted through low boost fueling. If you want no smoke, you would keep it set at 0-1, but would have slower spooling. If you want instant response, but don't mind smoke, you set it much higher. The higher it was set, the faster the response and the more smoke belched. With emissions controls on these being what they are, they are designed not to fill the DPF each time you want to move. Could be completely off base though.
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From: Oswego NY
Obviously stomping the throttle from a dead start is not the way I would use this truck I had just heard about the lag on this site so I wanted to see if I could experience it first hand. This is by no means something that would sway me away from purchasing one, the new Super duty is a great truck. Will have one in the garage soon. Thanks to those of you that replied.