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  1. J

    My 6.0L 4L80e build and swap, so far...

    Looks like you're on your way there. Blower looks relatively new, even has the fuel rail balance tube in the front (relatively recent addition). I would suggest rethinking the cam choice though, especially with the 112 on a 6.0L. Even with the smallest pulley you can get (2.75"), you're...
  2. J

    EFILive V1 Group Buy from Black Bear Performance

    If you PM me, I can. Your tahoe needs the V2 though, and it is not a part of the GB.
  3. J

    EFILive V1 Group Buy from Black Bear Performance

    Hey Everybody, From now through January 31st, we'll be running a group buy on all EFILive V1 products. Whether you need a GM specific OBD2 scanner to see what your 98-06 truck is doing or if you'd like to start tuning your 99-06 truck, there is a discounted V1 product for you. V1 Retail...
  4. J

    03 yukon Mods for Fuel Economy any ideas?

    So you've called dibs on it? I haven't gotten an email back on the parts we need to get the radix on, but expect to get it all within the next two weeks...
  5. J

    03 yukon Mods for Fuel Economy any ideas?

    Light throttle (very light, usually low speed) has a much shorter injector pulse width. Since the DIC calculates fuel milage based on a computation of delivered fuel, a slight inaccuracy in the internal table relating to the injector dead time will throw this value off. EG, PCM thinks it's...
  6. J

    03 yukon Mods for Fuel Economy any ideas?

    And if you do a lot of light throttle driving vs heavy throttle driving, the value will usually be farther out (due to inaccurate injector dead time values in the PCM).
  7. J

    03 yukon Mods for Fuel Economy any ideas?

    DIC mileage is calculated by injector pulsewidth (time open per cycle), Injector flow rate, RPM and vehicle speed. There's no way that the vehicle can get better gas mileage than stated by DIC (outside of a few % normal variation) in this manner. If he's using less fuel for a given distance...
  8. J

    03 yukon Mods for Fuel Economy any ideas?

    :lol: Wow, that site doesn't even try to mask the scam. "MLM Opportunity" is one of the links. Might as well have a section on "How this pyramid scheme works".
  9. J

    03 yukon Mods for Fuel Economy any ideas?

    Hydrogen fuel cell vehicle is a completely different technology wholy unrelated tothis electrolysis device called the HAFC. A fuel cell vehicle uses hydrogen and oxygen inputs to drive an electric motor. There is no combustion involved.
  10. J

    03 yukon Mods for Fuel Economy any ideas?

    Again, you don't have a legitimate comparison here. 40 miles, 60 miles, even 100 miles is not a legitimate basis for comparison. Get 2 full tanks before and after and that will be slightly more believable.
  11. J

    03 yukon Mods for Fuel Economy any ideas?

    Leaning an engine out does not make more power. That is a common misconception and one that is incredibly wrong. At closed loop, you're running at approximately stoichiometric (14.68:1). At 12.5:1, best power will be achieved on most tahoes on this site. Leaner than 15.5:1 and you'll start...
  12. J

    03 yukon Mods for Fuel Economy any ideas?

    Yes sir, I've been out of town for a couple of days here, am getting back to emails now.
  13. J

    03 yukon Mods for Fuel Economy any ideas?

    What's starting to become apparent is that you're more than just the average enthusiast interested in a product. This is sounding like you've got a vested interest in this product. Have seen this before with similar systems on other forums... The EPA does not test in that manner, they use...
  14. J

    03 yukon Mods for Fuel Economy any ideas?

    With three gallons of gas as a baseline, you're not going to prove a single thing. I can drive like a maniac for three gallons and get 9mpg average, then do something arbitrary like install a new air filter and drive like a granny and get 22mpg for the next three gallons. It would be ludacris...
  15. J

    03 yukon Mods for Fuel Economy any ideas?

    3 gallons of gas is not nearly enough for a statistically significant baseline... Get three full tanks and it might be a little bit more reliable.
  16. J

    03 yukon Mods for Fuel Economy any ideas?

    Ah, that would be why. At speeds over 35-40mph, the fans are no longer needed, as the air flow through the radiator is sufficient. What temp do you have the fans enabling at ?
  17. J

    03 yukon Mods for Fuel Economy any ideas?

    The difference between the two is that the electric fans have the potential to increase mileage. An engine-powered hydrogen extraction system has the potential only to waste energy. How are you controlling your fans?
  18. J

    best air intake

    Actually, the opposite is true. With all things equal, a hotter air charge has a tendency to detonate more easily, which is why ignition timing is reduced; rather significantly if temps are hot enough. Hotter air is also less dense. So, while the actual mass of air needed to maintain...
  19. J

    computer tune or hand held programer on 6.0

    Thanks. :) Jennabear will probably be fielding more of the in-forum questions, but I'll be handling most of the direct correspondence. As to your email, I should get to it tonight. I'm getting caught up from being out of town this past weekend.
  20. J

    computer tune or hand held programer on 6.0

    :thumbsup: We're vendors here now too. :yesnod:
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