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Thread: Injectors Auto-Phasing

  1. #1

    Default Injectors Auto-Phasing

    Hello. I'm hoping someone can enlighten me on this. I want to take advantage on auto-phasing my injectors. I have my camshaft profile, however, I have a problem with Injector Placement. I'm running a 358 small block Chevy with a BDS 871 blower with two 1200 CFM throttle bodies. 8 injectors rest inside fuel rail under the throttle bodies, which sits on top of blower. My question is how to calculate or figure out the distance for Injector Placement? Thank you.

  2. #2
    Join Date
    Dec 2009


    "Injector Placement - Straight-line, linear distance of the fuel injector from the intake valve, as measured or approximated from the injector outlet tip to the valve seat opening, in inches."
    For more Injector End Angle information: Open the Holley EFI software & "Help" Contents (top Toolbar), and read the "Injector Phasing Instructions". (Injector End Angle Tuning Information)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, Dominator MPFI & DIS, cold air induction, dual 3" exhaust/Magnaflow mufflers, 100HP progressive dry direct-port NOS, A/C, Lentech Strip Terminator wide-ratio AOD, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, custom traction bars, 4" lift, 35" mud tires

  3. #3


    Thank you Danny. I'll go to that section and will let you know the outcome.

  4. #4
    Join Date
    Nov 2013
    Chicago IL


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    Soon to go 7s on a little more boost.

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