850 Mighty Demon Jetting

Discussion in 'Holley' started by wiona, May 15, 2007.

  1. wiona

    wiona Well-Known Member

    I’ve got my combo just about dialed in but was wondering what jet sizes you all are running. I seem to be running a bit rich and was thinking going down on the jets but not sure how much.

    My combo:

    - ’72 462 ci
    - ’68 430 Big port heads (Was told there was porting but do not have any #’s)
    - 1.6 Roller Rockers
    - Stock lower end
    - Poston 113a cam (Do not know the degree)
    - MSD Pro billet distributor 18* initial 34* total all in at 1900rpm
    - MSD 6al box
    - 850 Mighty Demon.. 87 primary, 94 secondary jets w/ extensions… 35 squirters both sides, Brown cam
    - TA SP1 gasket matched
    - Holley Blue pump 3/8 line to regulator using stock tank (looking to install fuel cell and 1/2” line)
    - TH400 SP 1100 low 3000 high stall
    - 10 Bolt 3.73 posi
    - Long tube headers w/ 2 ½” X-pipe end after mufflers

    We really need a place to test and tune out on Long Island.:rant:

    Thanks in advance.

    Wayne
     
    Last edited: May 15, 2007

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