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Another tuner ?

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Old Jan 12, 2012 | 12:57 PM
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Another tuner ?

I know it depends on driving habits, tire, etc. I'm considering a tuner for a little boost in mpg. I have intake and a downpipe soon to be deleted cat. My question is for those who notices a difference while cruising at highway speeds empty, did you get any gains? If so how much? I drive 120 miles 3 times a week, currently getting in the neihborhood of 15 mpg. Tire size is 285, 410 gears, auto, going 70-75. Don't tell me a car gets 30 mpg I know and I'm not giving up my reliable, paid for truck. Especially when it snows! Thanks for the input!
 
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Old Jan 12, 2012 | 01:09 PM
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IMO if you'r buying a chip for mileage gains only, it will take a LONG time to make it worthwhile. I think you'd be better off making sure all your brakes are good and nothing dragging, bearings greased good, tires properly inflated, alignment is good, fresh fluids in the differentials, etc. If you want more power too, then a chip is a good investment. But I wouldn't buy one expecting much increase in mileage. With everything I've done to mine, I gained about 1mpg empty. I do make about 2-3mpg better towing now as I have quite a bit more power and use less of the skinny pedal.

How fast you driving? 4.10's of course are hurting you some, especially if you're moving along at a good rate. My 3.55's get 17 empty at 75. 20 at 55 but who can drive that slow?? Your mileage isn't off far in my opinion, depending some on how many rpm's you're turning
 
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Old Jan 12, 2012 | 01:17 PM
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I would like the extra power to as I will be doing some upgrades this summer. I want to build " my ultimate stage 1 truck " as I'll probably be driving it for 10 more years to be able to pay off my school loans. Thanks for the advice on maintenance I will get those looked over this weekend during my oil change. Another ? is are synthetic fluids worth it?
 
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Old Jan 12, 2012 | 01:23 PM
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With 4.10 driving 70-75 your rpm's are around 22-2500 witch will kill your MPG's.
I have a 2wd single cab with 4.10 and if I drive 70-75 my MPG's are around 15-16 if I drop back to 65-68 I can get 17-18
 
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Old Jan 12, 2012 | 01:26 PM
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I would drive slower but the speed limit is 80, and it's already everything I can do to stay at 70 and get passed by everyone!
 
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Old Jan 12, 2012 | 01:49 PM
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I wish I lived somewhere the speed limit was 80... i drive 40 miles each way to work and it is mostly 40mph, 55 tops.
 
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Old Jan 12, 2012 | 02:03 PM
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It's nice getting there fast but it's not fun watching the needle move fast either.
 
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Old Jan 12, 2012 | 02:04 PM
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4:10 gears will kill mpg, no two ways about it.
To add to what was said above, the best things you can do for MPG is to keep your boost low and your EGT low. This means driving with a light foot and not push any more fuel than you need to keep moving.
Try to use your brakes as little as possible. This means anticipate stops in advance and not keep your foot in the throttle till you're 20' from the stop light/sign.
Also, make sure the tires are aired up good.
And never go over 60 mph - 65 mph tops.
If any of these are overlooked you'll never achieve good mpg.
This might sound like a lot, but once you have it in your head that you want good mpg, you'll find yourself doing these things automatically!

Just my experience-based opinion.
 
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Old Jan 12, 2012 | 02:22 PM
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I agree completely with Jim, but the fact that you are running 4.10 gears and the speed limit is that high is KILLING you on fuel. You need to get some 3.55 gears in that thing or find an old overdrive unit someplace to swap into it. I'd LOVE to have an old gearvendors unit or something similar to put into my truck, but it would be a bit more involved on a 4x4. On a 4x2, not as much...
 
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Old Jan 12, 2012 | 04:22 PM
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For changing gears what would you guys think would be better 3:73 or 3:55? I tow a camp trailer maybe 3 times a year. Also I will probably run some 33 inch tires. What rpm drop would I see with each at 70 mph?
 
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Old Jan 12, 2012 | 06:10 PM
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approximately 500rpm drop with 3.55's, 300 with 3.73's. Give or take a bit of course. How heavy/big is the camper trailer? How far do you travel with it? I'd like to go to 3.73's sometime but I do tow rather heavy also.
 
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Old Jan 13, 2012 | 10:38 AM
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I know there are varying opinions on this but... Is it better to tow with OD on and "lug" the engine or is it better to turn OD off and run at the higher RPM's (less foot on the pedal to maintain speed)? I have 4.10's and tow 12 to 15k 5er through a very mountain filled So Cal
 
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Old Jan 13, 2012 | 11:26 AM
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Originally Posted by MHammer21
I know there are varying opinions on this but... Is it better to tow with OD on and "lug" the engine or is it better to turn OD off and run at the higher RPM's (less foot on the pedal to maintain speed)? I have 4.10's and tow 12 to 15k 5er through a very mountain filled So Cal
No input on mileage for you, but my opinion is that I would rather spin the engine faster and put less stress on it by running 3rd gear. It stands to reason that fuel consumption would be probably pretty close between both scenarios.

More mass fuel desired with fewer injection events per given time OR less MFD with more injection events per given time. If you have any way to watch MFD/IPW while towing, I suggest you do it. My mind is made up on how I'd rather tow.
 
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Old Jan 13, 2012 | 11:34 AM
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no way to check, yet, but am looking for an old edge I can use strictly for the sensor monitoring. I feel more comfortable towing in 3rd, but the added noise becomes a little (nuisance to the wife more than anything) bit of a problem. It also smokes a lot more when needing to pass or get in the throttle if i'm in OD. All in all, I can deal with some smoke if the MPG's will bet better, but it sounds like a wash. Thanks Cody!
 
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Old Jan 13, 2012 | 06:02 PM
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If it's lugging in OD you should click it down to 3rd.

If you are towing on a flat surface and not much engine strain it's ok to use OD, but when you hit a hill or it starts to lug I'd get the rpm's up.

3.55's are great for highway and 33" tires are a good size for them. If you are going up to 35's I'd keep the 4.10's
 
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