Re: more power an better mileage???

From: Bill Knight (wknight40@comcast.net)
Date: Tue Feb 17 2004 - 15:58:42 EST


I've got a 2k Durango 4X2 5.9L. I'm averaging 16MPG overall, for the
past year, and 19MPG highway at 70MPH. The only things I've done a
synthetic oil, indexed 3492's, K&N drop in filter, and modified air
intake box for ram air.

John Bell wrote:
> Y'all are gonna hate me...
>
> I have one of those dinosaur 5.9L quad cabs. 4x4, full time transfer case,
> 3.92 gearing. In other words, not built for mileage.
>
> Through trial and error over the last couple of years I've managed to get it
> to where I consistently get 13.5mpg in the city and 18mpg at 70mph hwy
> speeds.
>
> I have the 24 gallon tank, and usually get around 160-170 miles on half a
> tank of gas, give or take (don't really like to let it get below half a
> tank if I can help it).
>
> So by now you're probably saying, "well gee Uncle John, what's your secret?"
>
> I run a Hypertech programmer at 93 octane level. Autolite 3923 plugs. 180
> 'stat. 8mm JBA wires. Intense performance intake kit tapped for a relocated
> IAT (about 4" from the hat). Home brew port/polish throttle body with
> Z-stud. No passenger side flap protector by the radiator (air goes straight
> into the filter area). Final piece is a custom single 3" in/out catback
> using a Magnaflow muffler (just straight necked bends, no mandrel goodness
> - real cheap like).
>
> Used to run synthetic but now I just change oil at 3k on the dot. Always
> make sure my trans, transfer, and diffs have good fluid at the proper
> level. Most importantly this truck never sees more than 1/3 of full
> throttle unless I absolutely need it (even so it runs like a scalded ape,
> keeping up with traffic while in "old man" mode is no issue). No jackrabbit
> starts, whenever I do that I can literally watch the fuel gauge head left
> pronto.
>
> My buddy's G-tech is guestimating me at around 290hp/400lb-ft at the crank.
> Sure the ol' QC isn't breathing fire but she's got grunt.
>
> Anyway that's my data point. Pretend there's an eggshell between you and the
> gas pedal, and you'll see your mileage go up (that's an old Jackie Stewart
> driving trick, btw).
>
> Have fun,
> --
> JB
>
> Phillip Batson wrote:
>
>>I average about 210 miles to a tank. That's just
>>everyday driving. If I babied it and didn't let the
>>revs go above 2k, I'd get a lot better mileage, but
>>I'd see a lot more birds as it takes a long time to
>>get up to speed that way! 8)
>>
>>--- Ed Estoppey <turbododge@rogers.com> wrote:
>>
>>>I put a ported tb on my v6er along with a K&N gen 2
>>>intake and flowmaster
>>>exhaust, when i babied the dak i got good mileage
>>>when i tramped on it, i
>>>got bad mileage, but good performance. I got a R/T
>>>now and its just about on
>>>empty now , i got 290 kms(180 miles) on this tank of
>>>fuel :( and i babied
>>>it.



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