Recent content by rchalmers3

  1. R

    4.2L LL8 Flywheel - 4L60E CONFUNCTION???

    For future seekers of this bushing, the GM part number is 12587549. The cost is about $15 and is available on Ebay, Amazon and through the dealer. Thanks to all who read and contribute to this forum. Rick
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    4.2L LL8 Flywheel - 4L60E CONFUNCTION???

    Thread resurrection number two! I too need that bushing, and I'll be darned if I can find it anywhere on the inter-webs. I'm having a torque converter built for racing. The torque converter specialist said the small (.826") pilot converter can be modified with a higher stall speed. Anybody have...
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    Drag racing the GMT360 with the LL8

    Thanks for the bump. I wish I could agree with you that I have nearly completed this project. It appears to be the opposite: After fitting drag slicks and welding the differential, I tested the car and found the transmission has weak holding power in second gear. I am in the process of building...
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    Drag racing the GMT360 with the LL8

    Fellas, It's been three years in the making. This spring and summer I completed the car, then had it aligned and tuned. Last night I took it to the local 1/8th mile track. I will make this the final chapter of this thread and share with you the results of this project. Here are images of the car...
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    NEED HELP Fuel Pressure regulator location

    To follow up with Mooseman's suggested diagnostics, I found it useful to construct an inexpensive gauge that fits the schrader valve on the fuel rail. You can leave it installed on the fuel rail for as long as you care to test fuel system operating and holding pressures. The clearances...
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    GMT 800 (Sierra 4.8L) Injector sources??

    Thread revival and final solution: Thanks to all who contributed to my dilemma. After purchasing an inductive COP probe from Snap-On and an inductive coil plug probe from AES, I was unable to get meaningful secondary ignition patterns. I attribute this failure to my inexperience with the...
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    YT: 4200 turbo build

    @boosted blazer Maybe this will help. If your injectors has the connector form like the one on the left" Then you can source them here...
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    Drag racing the GMT360 with the LL8

    Thanks for the props. Yes to an inter-cooler. Here are a few details: The cooler hangs from the roll bar. I put flanges on the inlet and outlet to seal the pipes against the firewall. An unrelated detail is the dual OBD ports: one for a dash and the other for diagnostics. The ice box has an...
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    Drag racing the GMT360 with the LL8

    I have no idea of what the thing will end up weighing. I hope to be pleased and surprised, but because these trucks are so heavily constructed, I am attempting to curb my optimism. Why don't we start a guessing pool? Wikipedia says these trucks have a curb weight of 4400 lbs. I'll start by...
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    Drag racing the GMT360 with the LL8

    I stitched together the front clip. Now I need to figure out how to mount it.
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    Drag racing the GMT360 with the LL8

    More... Apologies to those of you who know how to build a car properly. I am aware of many details I could do better. I'll listen to your observations and ideas about things I may not know of or may not have considered. This has been an educational and fulfilling project. The remaining details...
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    Drag racing the GMT360 with the LL8

    Ok fellas, here is what I have created thus far.
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    Drag racing the GMT360 with the LL8

    Hey! @FloMaxSS Thanks for your continued interest in my project. You were gone awhile! I spent most the summer working on other people's projects, but I'm getting back to the car. It's a running, driving vehicle. I drove it around the block a few times, enjoying the open exhaust sound. I then...
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    Rod Knock -Replace or Repair?

    If the vehicle is as nice as I imagine it is, and you wish to keep it for some years, then I might suggest doing a light rebuild on that engine. Crank kits are available from RockAuto, and you will probably find the engine does not require much more than a good cleaning and re-assembly. The...
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    2006 LL8 - P0171 - Lean LTFT (+12-20%) - Intermittent MIL

    Sorry for another "late to the party" contribution, but in my former life as an automotive technician, we utilized propane to administer unmeasured fuel to the engine in order to monitor the computer response to the additional fuel. The propane bottle was fitted with a normal torch, and placed...

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