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  1. Replies
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    Just fixed a stock LQ9 myself that a local dyno...

    Just fixed a stock LQ9 myself that a local dyno shop screwed up badly. Made good power at WOT, but idled and drove terribly. 4L60E was shifting terribly because they axed all torque management out...
  2. Personally I would not disable lockup entirely,...

    Personally I would not disable lockup entirely, even in performance mode. You can raise the enable speed a bit, but you will cook the trans.
  3. Thread: Hello

    by Fast355
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    92

    350 Vortec would be nice from an 04ish Latin...

    350 Vortec would be nice from an 04ish Latin built GMT800 truck. Especially with the 5spd behind it. Gets you a P59 PCM running it.
  4. Thread: Hello

    by Fast355
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    92

    Is this an Export build? I had an 87 S15 Jimmy...

    Is this an Export build? I had an 87 S15 Jimmy with a 2.8L, but was unaware of GM using the 2.8 much less a 3.1L in the Blazer/Jimmy after about 1988. 3.1L was common in Isuzu products like the...
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    http://www.gearhead-efi.com/Fuel-Injection/showthr...

    http://www.gearhead-efi.com/Fuel-Injection/showthread.php?9616-New-LS1-Tuning-Tool-Universal-Patcher
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    It does not matter if you put tuned port on a...

    It does not matter if you put tuned port on a destroked 283 or 267 the runner length resonates where it resonates. Unless you use something like the Lingenfelter/Accell Super Ram or siamese ported...
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    It works and it works very well, IMO. I filter...

    It works and it works very well, IMO. I filter out the transients though. Any TPS change greater than 1% or MAP change greater then 1 KPA results in values not being saved for 500msec after the...
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    Not saying that it cannot brick a PCM, however I...

    Not saying that it cannot brick a PCM, however I have changed these tables on many operating systems to alter the pedal response for larger throttle bodies and personal preference. My 8.1L powering...
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    I build my base VE tables from filtered MAF data....

    I build my base VE tables from filtered MAF data.

    Dynamic air calibration from MAF
    Dynamic Air Calculated =
    (MAF gms/sec X 120) / (#Cylinders X RPM)

    VE Calculation from MAF
    VE=(DynamicAir X...
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    It is always good to discuss things with you...

    It is always good to discuss things with you Carl. I too started with speed density TBI/TPI and GM CCC Q-Jet.

    I too have fixed vehicles for the same reason. I actually just fixed a bone stock...
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    From memory the 2.2L also uses a power steering...

    From memory the 2.2L also uses a power steering pressure switch. That pin may have to have an input to gain AC clutch control similar to the PCM requiring a +12VDC signal on the brake switch pin to...
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    I have not run across issues altering MAF...

    I have not run across issues altering MAF transfer functions in nearly 20 years of tuning. Not saying it cannot happen, but it is not something I have seen in many different platforms. I mainly...
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    Headers definately throw the calibration off. If...

    Headers definately throw the calibration off. If you took a stock engine and put headers on it, the PCM will read at a higher dymanic airflow and put it in an area of the timing map that GM tuned...
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    I decided to prove a point with the whole intake...

    I decided to prove a point with the whole intake tract altering the MAF calibration. This has a LS3 cartridge MAF in a 100mm tube with a Saxon PC 6:1 flow straightner in it. My van reacted the same...
  15. I have tuned dozens of 6.0Ls myself. Stock engine...

    I have tuned dozens of 6.0Ls myself. Stock engine should not require a ton of dyno time to get it right. Match the file for DBC or DBW. Swap the injector data. Put the MAF data in that matches the...
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    I used the P59 Mexican cal on both my 5.7L and...

    I used the P59 Mexican cal on both my 5.7L and 383.
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    I segment swapped that file to use a 4L85E...

    I segment swapped that file to use a 4L85E (4L80E) for my 97 as the operating system matches some US built 2005 trucks. Then I fixed alot of the idle and DFCO settings for an automatic. Idle speed in...
  18. Thread: Hello all

    by Fast355
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    206

    Sounds like a fun project. From a fellow vanner,...

    Sounds like a fun project. From a fellow vanner, post pictures.
  19. Thread: Intake Swap

    by Fast355
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    323

    Intake is in my hands. Shipped quick, arrived...

    Intake is in my hands. Shipped quick, arrived quick, decent quality and came with install hardware. A little port match and sanding roll cleanup is all I intend to do on my sub 6,500 rpm 383.
  20. I had one of those Ford frame mounted pumps when...

    I had one of those Ford frame mounted pumps when I first converted my 83 G20 to TBI. It was garbage and loud. It lived a short life without the boost pump supplying fuel to its inlet. I switched...
  21. Thread: Intake Swap

    by Fast355
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    3
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    323

    Already double stock value and half the...

    Already double stock value and half the activation point. Had to ramp up the settings quite a bit to keep it from knocking on 91 octane with 11:1 static and 9.6:1 dynamic. It still lean cruises at...
  22. Thread: Intake Swap

    by Fast355
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    323

    Intake Swap

    So my 383 in my 1997 Express van has been running well but has been missing something. At WOT I have always seen the intake manifold pressure dropping as the engine revs up. I turned the MAF sensor...
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    I have always been told not to run a 700r4 or...

    I have always been told not to run a 700r4 or 4L60E much under 2,000 rpm especially in overdrive unless the load is very low. Even the upgraded pump has weak output and the cooler circuit robs both...
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    With a 4L80E/4L85E I gear to tow in overdrive. ...

    With a 4L80E/4L85E I gear to tow in overdrive. Easier to get rolling from a stop having 4 useable gear ratios with the deeper gears available to get you rolling. 700r4 and 4L60Es can barely hold up...
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    My van is a little under geared. Needs a 4.10...

    My van is a little under geared. Needs a 4.10 gear and has a 3.73. 30.47" tall tires and a 4L85E.
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