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Thread: The Quadrajet

  1. #16
    Senior Member
    Join Date
    Feb 2018


    Yeah one day. I havenít even begun to dial in my Ultra XP.

  2. #17
    casual poster
    Join Date
    Nov 2018


    Yes, 48 IDF Webers.

    I have four of them on my engine. Street driven.

    On a mate's car that I tune, I fitted a pair of 44 IDFs on an adaptor that bolts to a 4bbl manifold, which was a 4500 Victor. It picked up 30 rwhp over the 900cfm carb 4 bbl. In fairness to the 4bbl, some of the secondary adjustments that affected total airflow & distribution were not performed. Had these adjustments been optimised, the hp increase would probably have been less.

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