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Thread: Efficiency Question with Holley TBI

  1. #1

    Default Efficiency Question with Holley TBI

    This might not be a normal question asked here but, are the flat topped EFI throttle bodies like this: more efficient by any degree, than the OEM units with the extra material designed to quieten the intake sounds?

  2. #2


    No one? No Holley staff peruse these forums even?

  3. #3
    Join Date
    Dec 2009


    Test them on an airflow bench.
    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

  4. #4


    Yeah, I'm not at that level. I'm just an enthusiast, not a shop owner sadly. I'd wager though, obviously, the 'racing' TBI has a higher flow rate than OEM anything.

  5. #5


    Efficiency in this case, meaning miles per gallon.

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