455 air box standard

Discussion in 'Street/strip 400/430/455' started by Rui, Aug 1, 2019.

  1. Rui

    Rui Active Member

    Hi there.
    My standard air box for the 455 motor looks like this.
    Can anybody guide me as to what the additional items are and where they connect to (carb? exhaust manifild?).

    Can I "delete" them?
     

    Attached Files:

  2. Schurkey

    Schurkey Silver Level contributor

    The items circled are intended as part of a system to supply thermostatically-regulated, heated air to the carb to prevent carb icing and to speed warm-up.

    Carb icing is most common when the outside temp is about 40--45 degrees and raining. It'll stall the engine, and the engine may not re-start until the ice melts. Carb icing was a hateful mess before heated air intakes like yours.

    The better way to deal with this is to simply pull the vacuum hose that powers the thermal sensor. Plug the nipple it connected to on the carb, to prevent a vacuum leak. Instant "cold" (engine-compartment temperature) air all summer. Then return the hose to the vacuum nipple for fall, winter, and spring. Or just leave it plugged-in year around like GM intended.

    You already have the two vacuum hoses--carb to thermal sensor, thermal sensor to vacuum motor (on the snorkel). The duct hose that goes from the elbow under the snorkel to the heat-stove on the exhaust manifold isn't in the photos.
     
  3. Rui

    Rui Active Member

    Thank you.
     
  4. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

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