Results 1 to 6 of 6

Thread: Boost map help!!!

  1. #1
    procharged68mustang Guest

    Default Boost map help!!!

    I just got the 6al programmable box and msd distributor. Not sure the best way to make a map. My total timing is locked out at 33* my map im taking 1.5* of timing out per pound of boost. Starting at 3 pounds. Its breaking up at 5k and running 9-10 on my fast a/f meter. Am I taking to much timing out? That brings me to around 20* total timing at wot. I seen some maps where guys are starting at 5psi then only taking 1-.5* out per pound is that safe to do with 104 octane fuel? Im new to blow thru set up/ tuning and the msd programmable boxes.
    Thanks for any help.

    I have a ford 302 roller engine with a ford motorsport fcam with 1.7 rockers, 650 holley with a carb shop blow thru conversion, eldlebrock performer rpm intake, areomotive fuel system a1000 pump, fuel cell,performance automatic c4 3800 stall, 4:10 gears. 104 octane fuel 93 and 110 mixed 50/50 spark plugs gapped at .024.

  2. #2
    MSDTECH80 Guest


    Where are you starting the boost curve at 3 or at 18 on the graph?

    How the rotor phasing?

    It should be leading edge of rotor tip to leading edge of the terminal at 34*

  3. #3
    procharged68mustang Guest


    I starting pulling boost out at 18.50. It is not rotor phased, how do you do the with the msd billet distributor 8598? My total timing is 33 degrees right now.

  4. #4
    msdtech1955 Guest


    with an adjustable rotor p/n 8421

  5. #5
    Join Date
    Aug 2018


    I thought msd distributors were all phased?

  6. #6
    Join Date
    Jan 2010
    Brisbane, Australia


    You need an adjustable rotor when using electronic timing.

    MSD is the first to make this option available.
    Regards, Gary

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
About us
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Headers, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.
Join us