I have a stock truck with 265 tires. I'm tempted to try the PREDATOR Economy tune to see if I can improve my highway fuel economy. I'm currently in the mid-18.5 mpg range.

Has anyone tried this and found an improvement?

Is there any danger of limping or damaging the Allison at the 80 hp economy tune?

I have a 6000 pound boat, should I avoid towing on the 80 hp tune?

Is the predator easy to use?

Should I straight pipe the truck, if I install the Predator?

This is a work truck and I can't have it being LOUD, will straight piping make it obnoxiously loud?

Thanks much, Brian.

Has anyone tried this and found an improvement?
I've ran the economy tune for my v1.8 predator and while it didn't hurt my economy, it didn't seem to help much although most say the real benefits show up under tow conditions which I do very little of.

Is there any danger of limping or damaging the Allison at the 80 hp economy tune?
I've only limped in the 120hp tune, but since transmissions are wear parts and adding that much horse and torque are pushing the trans beyond it's factory limits I'm sure it will accelerate 'normal wear'. However I don't think at the lower 40hp setting it'll make more than a small difference. It's difficult to really say since so many different conditions exist(terrain).
I have a 6000 pound boat, should I avoid towing on the 80 hp tune?
There's a reason the 40hp tune is called a tow tune or economy tune. However if you're planning on tuning high like that you'd better have gauges. Better to be safe then sorry.

Is the predator easy to use?
Extremely easy, just follow a few on screen steps and you're done. However boxes like the Edge are even easier.
Should I straight pipe the truck, if I install the Predator?
A straight pipe isn't necessary from all I've seen and read, however a free flowing mufflerectomy(which is what did) will help keep exhaust temps down.
This is a work truck and I can't have it being LOUD, will straight piping make it obnoxiously loud?
I've heard these first hand, and yes they are loud. Think of motorcycle with drag pipes.

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I don't have near the expertise that many of our vendors here do, but I recommend when purchasing a tuner that you express your concerns with them and get their feedback. They deal with these on a daily basis, as myself I only plug in my Edge or Predator when I'm in the mood to play.

Thanks VR!

I guess not many are interested in fuel economy.

Was considering this from ebay-

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7962767446&category=33553

;) Brian.

I have my doubt's about that device on e-bay.

Anyhow the only real way to keep your economy good is buy good fuel, add a cetane boost, keep the tires properly inflated and keep it under 2000rpm. Adding a secondary fuel filter has also added mileage under many reports so that's another possible option. However all these are minimal gains.

How it works, I quote "These mechanisms are believed to help to disperse oil particles which become finely divided. In addition, hydrogen ions in fuel and oxygen ions in air are magnetized to form magnetic domains, which are believed to assist in atomizing fuel into finer particles."

Further, look at the claims:

Increase gas mileage 27%+ by helping fuel burn better
Reduce emissions by 43%
Pays for itself FAST!!!
Gives an extra 10% more horsepower.

Thanks VR!

I guess not many are interested in fuel economy.

Was considering this from ebay-

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7962767446&category=33553

;) Brian.
Every once in the while a magnetic something or other proposing to save fuel shows up. Don't you think if these snakle show gadgets were any good, they would be offered on new cars/trucks as original equipment. Save your money, put it back in your pocket.

And quit complaining about 18.5 mpg in a 7000 lb truck.......thats darn good mileage, considering winter fuel and all.....

I get 17 overall, maybe 21 on the highway....hellof a lot better than a gasser.

Would you rather be driving a Kia? :cookoo:

Tom :pig:

yeah 17 is pretty good my truck gets about 15, i dont think chips are going to get you any more mileage because youll be tempted to hammer the throttle mroe

My lb7 gets 18.4 according to my last hand calculations. That is a stock 4x4 ext. cab 02 with 116k on it. I check mileage almost every fill-up, getting between 17 to 20 depending on situation. I have 3,319 hours on the truck.

Wow, that is better than mine but i sometimes hit it with my chip, thats when it gets bad!! ive gotten it down to 0 and held it for a mile once!

I don't know guys, but all this fuel ionization and molecular alignment seems pretty plausible and very tempting.

Brian.:rolleyes:

PS-- I found out that my speedo is wrong I'm really getting about 19.25 mpg on the highway--no wind and no hills.

I run magnets on my fuel filter, but for a much different reason...

How it works, I quote "These mechanisms are believed to help to disperse oil particles which become finely divided. In addition, hydrogen ions in fuel and oxygen ions in air are magnetized to form magnetic domains, which are believed to assist in atomizing fuel into finer particles."

Further, look at the claims:

Increase gas mileage 27%+ by helping fuel burn better
Reduce emissions by 43%
Pays for itself FAST!!!
Gives an ext ra 10% more horsepower.
:knight:

Magnetic domains...love that one.

I don't know guys, but all this fuel ionization and molecular alignment seems pretty plausible and very tempting.

Brian.:rolleyes:
With CAFE requirements always increasing don't you think that if the manufacturers could add a $0.50 magnet and increase the fuel economy of all their cars they would do it?

Ditto on the gasser's...I'm avg. 16 in town, avg. 18+ running 70 + on the highway.
Just turned 70K on the DMax,02
Hyper Tech set at level 2. Just my 2cents

Does anyone know what % longer is the circumference of a 265 75 R16 v. a 245 75 R16 (Isn't this the OEM size on the truck?) tire?

Thanks, Brian.

Does anyone know what % longer is the circumference of a 265 75 R16 v. a 245 75 R16 (Isn't this the OEM size on the truck?) tire?

Thanks, Brian.
3.87% by my math.

I'm kinda TO'd that I only get like 15 mpg. How in the world do you all get 17+ Sure would be nice to get that.

Throwing the diablo and the predator on mine helped by the sound of about 2mpg. Even on the higher setting. As long as I don't drop the pedal everytime i pull out and stay in the range of 1700-2000 rpms... I do ok.

This brings me to an interesting and possibly stupid question.......I have 285's with no speedometer correction. It seems to read approximately 6 mph slower than actual speed by pacing it with a stock truck. Since the circumference is larger and the tire travels farther per revolution, is my trip meter inaccurate as well? If this is correct I would actually travel more miles per tank, increasing my fuel mileage? Or am I reaching, trying to make myself feel better about filling up today?

Speedstertwin:

Since the speedometer effectively counts tire revolutions per minute, and the odometer counts total wheel revolutions, your odometer is also recording fewer miles than actual. So yes, your trip meter is also inaccurate, and any miles per gallon calculation using the raw data will understate your true miles per gallon.

A 245/75-16 will turn about 680 revolutions in a mile. A 285/75-16 will turn about 630 revs in a mile. Therefore, if your speedometer and odometer are factory calibrated to recognize 680 revs of the tire as a mile, then you will in fact have covered 680/630 of a mile, or about 1.08 miles, for every mile recorded on your odometer. Or said another way, for every 100 miles your odometer records, you will in fact have traveled about 108 miles.

So, your actual fuel economy has been 8% better than you thought it was.

Doesn't that make you feel better?http://www.dieselplace.com/forum/images/smilies/smile.gif

Yes! Thank You!