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  1. Off Road tuning for a 2:1 and 2.72:1 doubler t-case

    Thinking out loud here...

    Working on figuring out a tune solution for an S10 truggy with an LS1, 4L65 and NP241 manual shifting t-case (which is 2.72:1). Before I pull the trigger on a 2:1...
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    You're all very welcome. Glad I could give back...

    You're all very welcome. Glad I could give back to the HPT forum.

    Sorry to all for being absent lately, I've taken a bit of a back seat to tuning over the last year and a half. Military duty,...
  3. Patiently waiting with money in hand to buy Jeep...

    Patiently waiting with money in hand to buy Jeep license.
  4. Vin = ij4fj68s6wl124792

    Vin = ij4fj68s6wl124792
  5. Just checking on the status of Jeep 4.0L tunes. ...

    Just checking on the status of Jeep 4.0L tunes. My wife and I just bought a '98 Cherokee and we're dropping in a 4.7L stroker next weekend. I would love to tune it.
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    I wanted to bring this thread back to the top...

    I wanted to bring this thread back to the top because I've been using the spreadsheets again for 2 different trucks lately.

    I did the axle swaps in my truck. 4.10's are now in, with 37's instead...
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    Does taking the battery off the charger allow you...

    Does taking the battery off the charger allow you to write? It may be protecting the system from a high output charge.
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    Don't have one yet because I haven't hooked up to...

    Don't have one yet because I haven't hooked up to this car. Been a little crazy lately moving, getting married and starting a new job. I wanted to start this post for people to start talking about...
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    How come no 3800 Monte Carlo files?

    Just picked up a 1998 Monte Carlo 3.8 auto that I'm looking at tuning. I've owned it for a few weeks now and have put almost 3000 miles on it, averaging 24-25mpg on an engine with 153k miles. This...
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    Fixed the issue of the throttle blip by only...

    Fixed the issue of the throttle blip by only removing the TQM above 30% throttle in the "ETC TPS Max" table. Feels more sluggish, but in this particular truck I'd rather have safe and predictable...
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    DBW issues with TQM. 2500HD Sierra 8.1L

    Howdy folks, been awhile since I've posted. I'm working on an '02 Sierra 2500HD with an 8.1L big block and 5 speed Allison trans.

    The issue I'm having is 2 fold. First issue we narrowed down to...
  12. You're changing the displacement of the engine....

    You're changing the displacement of the engine. Yes the 6.0L will run on the 4.8L tune, but only to get you home from wherever you had the swap done. From there you go into the truck's PCM and...
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    Let's get some tried and tested examples for...

    Let's get some tried and tested examples for future reference.

    WOT SHIFTS: 5700
    FINAL DRIVE: 4.30
    TIRE: 34.5
    STALL: 2000
    UP: 5
    DOWN: 5
    DOWN RPM: 9999
    IDLE: 650
  14. I find it useful sometimes to compare an auto vs...

    I find it useful sometimes to compare an auto vs a manual, so here's a manual '99 C5 I tuned last summer.
  15. I understand your need for off road winching...

    I understand your need for off road winching power. I own and have tuned a few LSx powered buggies or daily driven weekend warriors with 9000 -12000lb winches. The drain is definitely there, but...
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    Seams reasonable enough to me. ^^^ I'm going...

    Seams reasonable enough to me. ^^^

    I'm going to borrow the tip of VE tuning around idle areas by raising idle with the scanner to 1200, and back it down to as low as possible. This way you're not...
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    A wideband isn't necessary for part throttle...

    A wideband isn't necessary for part throttle tuning. I use STFT's all the time, last night in fact, on a H/C/I LQ4. I tuned everything up to 4000rpms using the narrow band O2 sensors, dialed in the...
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    That idle thread was assuming you're starting...

    That idle thread was assuming you're starting with a stock tune after a cam/heads/intake swap (or any combination of the three). You can use your tune if your VE/MAF table is right, your spark...
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    From the looks of your "stock" tune,...

    From the looks of your "stock" tune, unfortunately, I'd start over with a real factory tune and go from there. I see issues with your VE and MAF tables, spark tables are horrendous and I don't agree...
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    I agree. If you're commanding the pump to turn...

    I agree. If you're commanding the pump to turn on and you hear the relay click inside the glove box, at least now you can focus on the pump. Hotwire the pump, check it's grounds and such. Get the...
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    I'd guess the issue is wiring related.

    I'd guess the issue is wiring related.
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    Most pumps say "may contain up to 10% ethanol"...

    Most pumps say "may contain up to 10% ethanol" but that doesn't tell us the actual amount. Try finding an ethanol test kit to measure the gas you're filling up with yourself. Most of the pumps...
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    I can't say I agree with your fueling or spark...

    I can't say I agree with your fueling or spark tables. Perhaps try forcing open loop speed density for the meantime while you dial in your fueling. Start with a 6.0L tune for the VE table since...
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    Though this strategy is extremely helpful, I'm...

    Though this strategy is extremely helpful, I'm trying to breathe new life into this forum....you know, "Lead by example".
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    There are a number of things I'd change in that...

    There are a number of things I'd change in that tune.

    1. Idle transitions are rough.
    2. ve/maf is not dialed in. Could be due to poor injector data.
    3. Spark is overly aggressive and has rough...
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