goodbye spartan
Banned
Joined: Jan 2003
Posts: 1,457
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From: Grande Prairie, AB
^ You def dont need a hybrid to get 20+ mpgs!
I drive a 99 corvette and get ~30mpg highway and anywhere from 10-low 20s in town. (depending on the lead content of foot!)
Id take that spartan of your hands!
I drive a 99 corvette and get ~30mpg highway and anywhere from 10-low 20s in town. (depending on the lead content of foot!)
Id take that spartan of your hands!
Senior User
Joined: Jul 2010
Posts: 208
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I just got my Spartan and delete pipe and installed them on Thursday, all I can say is this a completely different truck, it has so much more power, that It scares me... The truck drives and shifts like a dream, no turbo lag and you can blow the doors off just about anybody... BUT with that said I bolted my DPF and DOC pipe back on and returned the truck to stock..The idea of having to go to the dealer if I have any warranty issue scares me a bit...Not sure what I am going to do....My truck has only 4800 khm so who knows what may show up for warranty related problems....
Junior User
Joined: Dec 2007
Posts: 68
Likes: 0
I just got my Spartan and delete pipe and installed them on Thursday, all I can say is this a completely different truck, it has so much more power, that It scares me... The truck drives and shifts like a dream, no turbo lag and you can blow the doors off just about anybody... BUT with that said I bolted my DPF and DOC pipe back on and returned the truck to stock..The idea of having to go to the dealer if I have any warranty issue scares me a bit...Not sure what I am going to do....My truck has only 4800 khm so who knows what may show up for warranty related problems....
Post Fiend
Joined: Jan 2009
Posts: 6,521
Likes: 11
From: Greenwood, SC
I've been on the 6.7 site a good bit. When they were first starting to go in service the mileage expectations were unreal, you know 20 MPG. Lately I haven't heard too much about it. Course the fact that they are not complaining could mean its pretty good. The lowest geared rear axle is a 3.73 I think. So that helps, but it also gives up some power. They say the tranny makes up for it but I don't buy it. They have to be losing some rear axle low end power. If they could get a truck like ours up to 15MPG that would be OK. But it wouldn't make enough savings to make me trade. They would want 30 thousand dollars difference to trade, or more. Those 2011s like ours cost 60 thousand dollars. I only drive mine on RV trips so the low mileage doesn't bother me too much. We are thinking about taking a small car down to florida with us this winter so we can leave the truck parked most of the time.
I am not trying to win you over, but the new engine/tranny is really good. Unloaded I'm not sure what I get but it's more than 16 for the brief times when I am unloaded.
Senior User
Joined: Jul 2010
Posts: 208
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Yes but at the time it did not bother me...It did not take long to put back on or off for that matter.
Senior User
Joined: Mar 2010
Posts: 120
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From: Sale Creek, TN
This is what I don't understand about tuners. People buy them and use the higher tunes (more HP) when they aren't towing but when they tow where a person would think they would need more HP they take out most, if not all, of the tunes.
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
we are pushing the limits of the engines with the tunes on.
towing we KNOW we are pushing the engine to begin with.. IF there is a problem with over pressure or something (head gaskets on the 6.0 for example), it will happen under load..
Sam
towing we KNOW we are pushing the engine to begin with.. IF there is a problem with over pressure or something (head gaskets on the 6.0 for example), it will happen under load..
Sam
Senior User
Joined: Dec 2009
Posts: 216
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Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
Stanley, believe me, I would not give you info that is not accurate or even exaggerated. My 6.7 w/3.55 gets 12.9 hand calculated towing a decent load (8K trailer that is 12ft tall and 18ft long) mixed two lane and interstate. And the power is unreal, rear end ratio and grunt off the line are totally different than the 6.4, very satisfying low end grunt on these trucks. If you had one with a 3.73/dually your off the line experience would be drastically different than with your 6.4.
I am not trying to win you over, but the new engine/tranny is really good. Unloaded I'm not sure what I get but it's more than 16 for the brief times when I am unloaded.
I am not trying to win you over, but the new engine/tranny is really good. Unloaded I'm not sure what I get but it's more than 16 for the brief times when I am unloaded.
Hotshot
Joined: Nov 2000
Posts: 11,591
Likes: 14
From: Pflugerville, tx
and I agree with you Stanley, but.. its not X over 3.73 OR 4.10
its X at 4.10 vs Y at 3.73
X was 650torque at 2200rpm, vs 800torque at 1800rpm.
so there is more power sooner than before..
YES, if they were BOTH 800, AND the same tranny then the 4.10 would be better off the line.
Sam
its X at 4.10 vs Y at 3.73
X was 650torque at 2200rpm, vs 800torque at 1800rpm.
so there is more power sooner than before..
YES, if they were BOTH 800, AND the same tranny then the 4.10 would be better off the line.
Sam
Logistics Pro
Joined: Nov 2001
Posts: 3,787
Likes: 102
From: Georgia
and I agree with you Stanley, but.. its not X over 3.73 OR 4.10
its X at 4.10 vs Y at 3.73
X was 650torque at 2200rpm, vs 800torque at 1800rpm.
so there is more power sooner than before..
YES, if they were BOTH 800, AND the same tranny then the 4.10 would be better off the line.
Sam
its X at 4.10 vs Y at 3.73
X was 650torque at 2200rpm, vs 800torque at 1800rpm.
so there is more power sooner than before..
YES, if they were BOTH 800, AND the same tranny then the 4.10 would be better off the line.
Sam
Senior User
Joined: Feb 2006
Posts: 257
Likes: 0
From: Kingsland, GA
All I know is I test drove a 2011 F350 King Ranch before I bought my F250... I floored the thing from a dead stop (the salesguy made me do it!) and when the turbo spooled up, both rear wheels started spinning and I left 2 burnout strips about 20-30 feet long on the road. No idea what gears it had but it could move for a big-un.
Senior User
Joined: Sep 2010
Posts: 144
Likes: 0
Just Gotta love these type of Discussions.....
Some simple facts:
To make power you need fuel. More power = More fuel used.
The faster you travel the more wind resistance you work against and the more power you need to maintain the velocity desired.
Big Power is not a bad thing, it is how you apply it to the application
There is a sweet spot where all vehicles run most efficent and that spot depends on too many things including how the vehicle is setup and where it is run.
If you are going to Pull Max load in the mid-west you don't need 4.88 gears to run down the highway, but if you run in the rockies with 3.73 you are going to burn something up at max load.
One thing I miss from the big straight six motors is low end torque(off idle). Torque is what gets the job done our trucks (Navistar engines) do not produce low end torque but are real fun to drive.
If you are looking for max efficency operate at just below peak torque and at a constant or as close to constant speed/power level as you can.
Pass the popcorn....
Cheers
Some simple facts:
To make power you need fuel. More power = More fuel used.
The faster you travel the more wind resistance you work against and the more power you need to maintain the velocity desired.
Big Power is not a bad thing, it is how you apply it to the application
There is a sweet spot where all vehicles run most efficent and that spot depends on too many things including how the vehicle is setup and where it is run.
If you are going to Pull Max load in the mid-west you don't need 4.88 gears to run down the highway, but if you run in the rockies with 3.73 you are going to burn something up at max load.
One thing I miss from the big straight six motors is low end torque(off idle). Torque is what gets the job done our trucks (Navistar engines) do not produce low end torque but are real fun to drive.
If you are looking for max efficency operate at just below peak torque and at a constant or as close to constant speed/power level as you can.
Pass the popcorn....
Cheers
Senior User
Joined: Feb 2006
Posts: 257
Likes: 0
From: Kingsland, GA
What do you consider good low end torque?