Yes, fuel prices are high......The truth about fuel economy.

[cleatus12r]

This is going to be a "sticky", not that most people really read them anyway. I've just returned back home after a four-day trip from New Mexico and I had nearly 50 new emails (not orders or invoices) just about tuning questions since Tuesday evening. 20 of these emails were about fuel economy and each one was nearly identical in the way it was worded. I'm going to hope that people read this before emailing.

Yes, the recent fuel prices suck. I'm not going to dispute that at all. However, if you ask anyone that I know, you'll find out that I never complain about them. Why? It's not because I don't drive. I drive a lot. I currently have two Powerstroke trucks that I drive all the time. I tow with them, I daily drive with them, and I use them for "Sunday drives". I love my trucks. However, THEY ARE TRUCKS. Their intent is not to drive kids to the soccer field and get groceries every day. They are meant to move loads. I hate it when "fuel price hike season" hits because EVERYONE wants miracles.

I also own a gutless early-90's car. Yes, it sucks to drive. However, it gets good mileage, it's paid for, and it's quiet. I HATE driving the car because it's not a truck. I realize that if I need to get good mileage, then I don't drive either one of the trucks. It's that easy. Sorry, but you can't have both. Either enjoy driving your truck and realize that it's going to drink a lot of fuel or don't drive a truck.

There is NO magic pill that will help you get better fuel economy. If we could write tuning that would guarantee an increase of a couple miles per gallon, we would be gazillionaires. If we had the capability of making sure your truck was able to achieve 20+ MPG, don't you think we'd be touting it all over town (and the internet) so that we'd be able to corner the market and get rich? Buying performance tuning will make your truck run better, faster, stronger. Just don't expect that extra power to not come at a price. The only way to get more power is to be able to burn more fuel. More fuel for a given distance equals what? Even folks that rely on calculators to add simple whole numbers can figure that out!


Is it impossible to get better mileage with aftermarket tuning? No. It it reasonable to expect an increase? No. You just have to realize that if you want better fuel economy, even with aftermarket tuning, that you're STILL going to have to drive like you actually want good fuel economy. There are things that all aftermarket tuning companies do to help increase the efficiency of the engine. The automakers are responsible for selling a product that makes a specific amount of horsepower and remaining suited to taking on all kinds of driving/usage demands. They also are REQUIRED by a rip-off governmental agency called the EPA to meet certain guidelines for specific emissions. These emissions guidelines have a profound effect on what automakers can get away with in thier stock tuning. Basically, we in the aftermarket trade hydrocarbons for oxides of nitrogen. We can increase the combustion temperature and pressure to help with efficiency. This increases the amount of "Nox" emissions, but helps a little with hydrocarbons (which boils down to efficient fuel usage).

The only ways that are known to help (not drastically improve, mind you) with mileage are to make the truck easier to accelerate and easier to keep at a given speed (from the engine's point of view). The less power it takes to get your vehicle up to speed and keep it there, the less fuel you will burn. Lifts, larger tires, more weight, etc. are not going to help at all. Sure, a stock truck doesn't look cool, but complaining about a loss in mileage and power after turning your truck into a heavy tank with the aerodynamics of a brick wall doesn't make sense.


In closing, I'm not saying we can't help with fuel economy. Just don't be too upset with us when you're still getting the same mileage that you were with another brand of tuning or even stock tuning. Expecting a fuel economy increase from nothing more than aftermarket tuning can be disappointing. If you are in search of better fuel economy, I invite you to check out a section of PowerstrokeNation MPG - Fuel Economy Discussion - PowerStrokeNation : Ford Powerstroke Diesel Forum. There is a guy named Dave Whitmer that has done EVERYTHING one can do to a SuperDuty 7.3L truck to try to get sky-high mileage (and this also involves driving like grandma which is no fun). I think he's up to a whopping repeatable 26 MPG and nobody out there is going to go to the extremes that this guy has just to get those numbers.

I hate coming off as a stick-in-the-mud, but accept your truck for what it is; NOT an economy car.

Cody.

[Hoverp]

Does the chip affect our factory fuel computer?

[yngbuck19]

Your factory fuel computer is your right foot just like he said up above.

[Hoverp]

Thats not the question, the question is from a tech standpoint, does the chip induce errors into the factory fuel computer.
does the chip induce errors into the factory fuel computer.

pretty simple question, I didnt ask about if i get more actual mileage with a chip.

[cleatus12r]

"induce errors"?

The chip causes the PCM to calculate fuel rate differently based on similar inputs/demands compared to the stock Ford programming.

[Hoverp]

Induce errors, I guess what I'm trying to say is if the trip computer was accurate before the chip install will it still be accurate after the chip install?

[cleatus12r]

If you're talking about the estimated economy display in the overhead console, no, it will not be accurate after install (this is why people who buy aftermarket programming instantly tout that they went from 14 MPG to 675.3382 MPG).

[Hoverp]

Thats EXACTLY what my question was. Thanks for clarifing.


Ive never seen mine go to that extreme. 675MPG (LOL) , but when it says 15. 8 in town, or 19.5 on the highway average before, then after the chip install it goes to 16.5 in town and 20.4 on the highway......, I was just curious as to what effect the chip has on the trip computer.

[ToMang07]

Very, very well put, Cody.

With your permission, can I re-post this (giving you credit) on another forum?

Is it impossible to get better mileage with aftermarket tuning? No. It it reasonable to expect an increase? No. You just have to realize that if you want better fuel economy, even with aftermarket tuning, that you're STILL going to have to drive like you actually want good fuel economy. There are things that all aftermarket tuning companies do to help increase the efficiency of the engine. The automakers are responsible for selling a product that makes a specific amount of horsepower and remaining suited to taking on all kinds of driving/usage demands. They also are REQUIRED by a rip-off governmental agency called the EPA to meet certain guidelines for specific emissions. These emissions guidelines have a profound effect on what automakers can get away with in thier stock tuning. Basically, we in the aftermarket trade hydrocarbons for oxides of nitrogen. We can increase the combustion temperature and pressure to help with efficiency. This increases the amount of "Nox" emissions, but helps a little with hydrocarbons (which boils down to efficient fuel usage).

^My favorite part, BTW.

[cleatus12r]

Originally Posted by ToMang07

Very, very well put, Cody.

With your permission, can I re-post this (giving you credit) on another forum?



^My favorite part, BTW.

You've seen my posts at FTE, Tom.

Use it and abuse it. It's on the 'net for all to see.