TBucket Engine Project (Dart SHP)

Discussion in 'Engine Combos and Dynometer Database' started by Indycars, Nov 3, 2010.

  1. Grumpy

    Grumpy The Grumpy Grease Monkey mechanical engineer. Staff Member

    love the posted picture quality
     
  2. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Ideally you want to check the Secondary KV pattern.
    Raster pattern
    Parade pattern.
    Super imposed pattern.
    Actual Dwell time per cylinders all 8.
    Rise time.
    Ignition firing time.
    Have my Snap On CRT Counsler Digital Ignition Storage Oscilloscope.
    It was about $10,000 new .
    1990 vintage.
    Bought it from a Friend that closed down his Auto shop.
    Still paid good money to make it mine.
    $600 back 2001.
     
  3. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Some checks can be made with a standard CRT oscilloscope.
    One mistake though and it will blow up from the High Kv secondary ignition voltage.
     
  4. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    There is also coil saturation time too.
     
  5. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    We are in an era of disposable everything.
    It's remove and replace today.
    Literally guess.

    I am one of the last mechanics to learn all electronic ignition fundementals.
     
  6. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    Points & Mags also.
     
  7. Indycars

    Indycars Administrator Staff Member

    Thanks Grumpy!!!
     
  8. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    If you found no vacuum leaks at all then install the ebay distributor you have from testing back 1-1/2 years ago.
    See if it hits clean on all 8 cylinders again.

    Substitution testing.
     
  9. Indycars

    Indycars Administrator Staff Member

    .
    My ignition timing is stable now compared to the video I took on Feb 20, 2016. Shown below.



    The MSD module has changed, I read on YouTube that someone had the same problem with stability
    and I had changed it after the video. So I can't say for sure if that cured the problem or the change below.

    This winter I changed from a cheap Professional Products damper PN#: 8002 to a Fluidampr 62260D 6-1/4" OD Gold Harmonic Damper.
    https://www.summitracing.com/parts/pfs-80002/overview/
    https://fluidampr.com/chevy-small-block/

    Below you can see how the ignition timing has stabilized. At about 7 seconds it will clear up, look for the black dot at 36°.


    https://fluidampr.com/faqs/
    .
     
  10. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    The 2nd video I can not see your black timing mark.
    I use a white paint stick paint pen to mark TDC.
    I have a Pontiac Egg Shell Blue paint stick pen that also shows up well with a Xeon flash strobe light.

    Did you find a vacuum leak or not Rick ?
     
  11. Maniacmechanic1

    Maniacmechanic1 solid fixture here in the forum

    I won't have time till this weekend.
    Have to make a video again.
    Show how my Snap On Counsler Ignition Oscilloscope works.
    Connect to my 1987 Corvette.
    It also works on my Vertex Magnetos.
    Spin test a Chevy & Pontiac V8 Mags in my SUN Distributor machine.

    Absolute Best way to test for unusual ignition problems.
     

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