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Spark-is there a better way

This is a discussion on Spark-is there a better way within the Forced Induction forums, part of the LSx Technical Help Section category; Greetings. Here is the thing. I have a 6.0 L LS, with a fairly big hydraulic cam, forged pistons, boostline ...

  1. #1
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    Olive Drab
    Slingshot Dragster

    Spark-is there a better way

    Greetings.

    Here is the thing.

    I have a 6.0 L LS, with a fairly big hydraulic cam, forged pistons, boostline rods, and an F1X procharger in a slingshot dragster with a powerglide.

    It has an LS smart spark control system for the 24Xcrank trigger, cam sensor at the back (gen 3?) and stock 585 coils. NGK plugs (cold) gapped at 0.025"

    Constant flow (mechanical) methanol fuel injection. Waterman 700 pump.

    I am happy to provide greater detail about any of this if requested.

    Here is the problem

    When we let off the trans brake it goes pretty good for less than 1 second, then shuts off, then does it again...and again, until the driver lifts or we break something.
    We are currently leaving at 3500 RPM which happens to be about 4 psi boost. We have seen boost as high as 20 (after holeshot), but usually run into trouble at 5800rpm and 12 - 15 psi boost.
    We have been all over the place with both fuel and timing. And I am down to the Ignition system >>>(crank and cam sensor, coils and controller with their associated wiring)<<
    which all works perfectly in the driveway, the pits, and during the burnout---just not the track

    Car works perfectly with a 509 BBC and an MSD 7AL (N/A- no boost) same basic fuel system

    Any ideas?
    Hit me...I can take it ....maybe

    Kendrick

  2. #2
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    Any update on this?

  3. #3
    Junior Member
    Join Date
    Jun 2021
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    Olive Drab
    Slingshot Dragster

    Thanks for asking. I just did a long reply and must have hit the wrong button. It just....disappeared...let me try this other button...

  4. #4
    Junior Member
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    Olive Drab
    Slingshot Dragster

    That one worked! Let me try again

    No update on performance yet, but I am trying some new things after taking the LS Smart Spark to the mfg. in Daytona which they were happy to test for me--and they said no problem there.
    They are familiar with boosted high HP stuff and suggested a coil upgrade from Holley which includes a larger wire for more potential current to the coils.
    We also re-gapped the plugs to 0.015" and carefully indexed them with the gap facing away from the intake valve.

    We will go to the track and see.

    Kendrick

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