How do you all get 6.2s to 300K miles

[dbrannon79]

I think with your current setup that's about the best you will see. fuel mileage will change drastically with how much lead is in your foot! but slight changes can be made with proper tire inflation too. what speeds do you normally see in your routeen routes? what size tires are you running, gear ratios, and overdrive function are the keys to getting good mileage. if you do most of your driving on the freeway, then look at what RPM's are at speed. it's a $$$ investment, but a gearvendors overdrive unit coupled to the arse end of your trans might also help. it's like having one extra gear to lower RPM's on the freeway.

I have one on my 93 truck that is behind a 4l80e giving me a double overdrive. it helps on the freeway and I like it. but again it's a heavy investment that will take a while to pay for it's self. Mine paid for it's self already only because the truck had it installed already when I bought it.

 

[nycxjeremyy]

Well, to answer your questions:

- 33 inch tires
- 3.73 gear ratio
- Stage III 4L60E (OD)

With NYC/LI traffic im on the interstate doing 45-55, many times just barely coasting. When theres light or no traffic im on the 60-65 mark (though when im headed out to LI where my VA is its more empty and i tend to cruise at 70MPH) I don't accelerate fast to that speed so it actually takes me a while (and a downward slope) to reach it.

 

[dbrannon79]

Sounds like your about as efficient as you can get. Now you just need to install WMI (water mist injection)

 

[nycxjeremyy]

Sounds like your about as efficient as you can get. Now you just need to install WMI (water mist injection)

Whats WMI?

 

[dbrannon79]

The term is used in two ways. Water mist injection or water methanol injection. Both are used on diesel engines. A fine mist of water is sprayed into the intake while under acceleration to add power and to help cool the incoming air. There is a science behind it that helps improve efficiency and also keeps the combustion chamber clean of carbon buildup. A tiny amount of fine water mist goes a long ways. Too much and kaboom goes the engine. I’ll let others explain it in better detail.