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Thread: Accel EFI Intake Manifold

  1. #1

    Default Accel EFI Intake Manifold

    The application: Accel EFI MPFI single plane manifold with EFI rails alteration to a Chevrolet LT1 based engine.
    Elimination of the Chevrolet LT1 intake manifold. 4150 flange.
    Fabricated 4" tube runner and throttle_body for fit under a 97 SS hood.
    Cut off GEN1 manifold cooling fittings. LT1 has reverse cooling block/ head design.
    Re-drilled head bolt holes for LT1 head match.
    3/8-16 UNC fasteners with 15° washers for fitment.
    LT1 intake gasket reused and drilled for Gen 1 manifold center bolts.
    Weld on throttle body cable festoon detail.

    I don't know if Holley will support the old Accel EFI manifold? B.

  2. #2
    Join Date
    Dec 2009


    Quote Originally Posted by mzgp5x View Post
    I don't know if Holley will support the old Accel EFI manifold?
    Why wouldn't Holley EFI work on this intake manifold? It's an aftermarket engine management system; operating the fuel injectors & controlling the ignition timing.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3


    Yes it does. I'm currently installing a HP EFI for this manifold & LT1 engine. Any EFI Gen 1 manifold will work, but would require modifications for different LT1 head bolt fastener locations, and a remote throttle body. This can be done. This was the only solution for the old Chevy LT1 manifold replacement (1997 Camaro SS Gen4 app).

    Fuel injectors: 95 lb/hr low impedance EV1.
    Ignition timing: Optispark eliminated. EFI connection 24x & single cam pulse installed with Coil-On-Plug change. Distributors will not fit under a 4th Gen cowl.
    I'm new here. Thank you for response. B.

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