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  #31  
Old 10-13-2011, 11:01 PM
rbyrne7 rbyrne7 is offline
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wait why is the hp below 300? stock is 310...?
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  #32  
Old 10-13-2011, 11:32 PM
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USAF ram USAF ram is offline
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the stock numbers are at the crank. there is a 20-25% power loss between the crank and the rear wheels.
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  #33  
Old 10-17-2011, 10:32 PM
Gene K Gene K is offline
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Quote:
Originally Posted by Cessna337 View Post
I'm just amazed at the wide variations in fuel economy with all the Ram 1500s. I have a 2010 Quad Cab SLT 4.7, 3:73 Amsoil 5w-20 OE full synthetic oil and have never been under 16.4 mpg (in winter). I average 17.8-18.2 (about 80% highway) and 16.8-17.4 (80% city). Truck is 100% stock.

Maybe I do several things most would not do. I always watch the info panel and keep the truck in the "eco" mode. Dificult when I first started, but second nature now. Also, my tires are kept at 41 lbs (1 lb over stock, but well within the range of gauge error) And the third thing is avoiding jackrabbit or too many stops and starts. Also, as when I had my airplane, keeping the tank full eliminated evaporation when not using it since a partial tank allows more airspace to allow more evaporation. (I know, partially eliminated by the truck's closed fuel return system, but some evaporation still takes place)

Maybe I go too far, but if it all adds up to better mileage, I'll keep doing it...I love my truck!
My truck has never went below 18 mpg or above 21 mpg although Ive never run a whole tank on the highway. Its 100% Showroom Stock (Unless you count activating remote locking). Most tanks are in the low 19's. Last tank was 20.3 mpg. All manually calculated as I dont have EVIC.

PS What made you choose to install 3.73's in your truck. What advantage do you feel they offer over the factory 3.55 and 3.92 Gears.
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  #34  
Old 12-12-2011, 02:17 PM
cammer cammer is offline
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Quote:
Originally Posted by USAF ram View Post
the stock numbers are at the crank. there is a 20-25% power loss between the crank and the rear wheels.
I wonder if the graph is for a 4x4? If you run the numbers with a 20-25% added in I come up around 287 not our advertised 310. I was hoping the tuner would get closer to the 50hp but this may be with exhaust, CAI.
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  #35  
Old 12-12-2011, 02:34 PM
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I wonder if the graph is for a 4x4? If you run the numbers with a 20-25% added in I come up around 287 not our advertised 310. I was hoping the tuner would get closer to the 50hp but this may be with exhaust, CAI.
I'm not sure what you mean, but I think you may be misreading the information...

The stock (peak) numbers posted by dodge (310 hp and 330 lbft) are at the flywheel, not the rear wheels. The stock (peak) numbers at the rear wheels would be more like (310hp * 0.80) = 248 hp. This is for a guesstimated 20% drive train loss. Just an FYI, drive train loss is not truly a percentage loss, but it is relative for a street car. For example, if you have a 500 peak hp engine in a car, and you get 400 peak hp to the wheels (20% loss), then add nitrous or something and have 1000 peak hp just say, you still only have 100 hp loss to the wheels (not 20%), as the drive train didn't change at all (this is just an example, not reality, as realistically you would have to beef up the drive train to handle the extra power most likely).

So just say stock (peak) numbers are 310 hp at crank, and 250 hp at wheels.

Superchips claims to add 50hp with their 91 tune. Many confuse this and say their claims are bogus, but they are not actually; the 50hp is not a peak gain, but a max gain. It is not 50hp added at the peak number(310 flywheel hp), it is 50hp added at about 4,000 rpm. The max gain on the 91 tune if I remember correctly is about 16hp and 33 lbft.
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  #36  
Old 12-12-2011, 02:41 PM
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And to sort of make it all clear, some people don't think this is all that impressive, but it really is:

Tuner that provides say 15 peak hp and 50 max hp for $300ish

or

CAI that provides say 2-7 peak hp and 5-10 max hp for $200ish

Obviously prices vary and numbers are guesstimated, but my point is that tuners are by far the best bang for the buck, especially because they are so easy to "install" and they are so easy to manipulate the tunes, and have a hundred other benefits/features.
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  #37  
Old 12-12-2011, 02:53 PM
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Ok, Now I understand. I was under the impression of a 50hp bump from 310 and that is what I was thinking. Which is not a realistic number. I should have reread it several times.
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  #38  
Old 12-12-2011, 02:58 PM
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Quote:
Ok, Now I understand. I was under the impression of a 50hp bump from 310 and that is what I was thinking. Which is not a realistic number. I should have reread it several times.
Yeah I wish the tuner companies would advertise it that way and say MAX and PEAK gains. But of course they only want to post the highest number...
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  #39  
Old 12-26-2011, 06:11 PM
RamIt11 RamIt11 is offline
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Has anyone heard of these people? They are a company that is selling a power module for the 4.7l that says you will gain up to 75 more hp and about 8 mpg and it connects to the air temp sensor of the intake tube. it says in about 300 miles it will retune to those numbers and has a dyno sheet to prove it. just looking for advise before buying. I have researched them but most comments have been left about cars.
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  #40  
Old 12-26-2011, 06:28 PM
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snrusnak snrusnak is offline
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Quote:
Has anyone heard of these people? They are a company that is selling a power module for the 4.7l that says you will gain up to 75 more hp and about 8 mpg and it connects to the air temp sensor of the intake tube. it says in about 300 miles it will retune to those numbers and has a dyno sheet to prove it. just looking for advise before buying. I have researched them but most comments have been left about cars.
Sounds like BS to me. Those IAT sensor resistors (which I assume it is) don't do anything good for the engine. The only thing that would be helpful is a real tuner (superchips, diablo sport, SCT, etc...)
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