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Thread: 850 Holley factory settings

  1. 04-30-2003, 09:08 AM #1
    Hustler
    Does any one know what the factory jet size is on a 850 double pumper?
    [ April 30, 2003, 02:36 PM: Message edited by: Hustler ]
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  2. 04-30-2003, 09:22 AM #2
    058
    For a #4781 use #80 jets in the pri. and sec. Thats what they come from Holley with.
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  3. 04-30-2003, 09:26 AM #3
    Oldsquirt
    Oldsquirt is offline
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    There's a variety of 850's. Check the info on this site Mortec/Holley carbs against the Holley List# on your carb(on front of choke tower).
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  4. 04-30-2003, 01:02 PM #4
    Hustler
    Thanks for the infor guys, I think I will start out with the 80's. The choke horn has been milled off so I'm not sure of the exact model #
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