Tuning engine for boost

Discussion in 'Technical' started by elliot, Jul 15, 2012.

  1. elliot

    elliot Member

    Joined:
    Apr 12, 2003
    Messages:
    1,645
    Likes Received:
    5
    Trophy Points:
    111
    Location:
    Boubon MO
    Vehicle:
    76 4 door 347 paxton and t56
    I have everything I need to prep my carb but I have no idea what to do as far as timing and what plugs to use ect. Any advice would be greatly appreciated !

    Thanks,

    Elliot.
     
  2. MaverickDan

    MaverickDan I wanna go fast!!!

    Joined:
    Jan 1, 2007
    Messages:
    808
    Likes Received:
    45
    Trophy Points:
    113
    Garage:
    1
    Location:
    Midlothian, VA.
    Vehicle:
    73 Maverick 4dr
    Most people lock their timing at 18*, I'm using a msd 6a-btm timing master to pull 3* per psi. I have my timing set to whatever it ran good on na. As for sparkplugs I use autolite 24, it is 1 heat range colder than stock. Depending on your boost pressure you may need to run a smaller gap.
     
  3. elliot

    elliot Member

    Joined:
    Apr 12, 2003
    Messages:
    1,645
    Likes Received:
    5
    Trophy Points:
    111
    Location:
    Boubon MO
    Vehicle:
    76 4 door 347 paxton and t56
    I`m running a (gasp!) 600 cfm edelbrock and the kit came with pulleys to run 10 psi but I may try to pull that back to 8 psi I don`t know yet. What exactly do you mean when you say "lock" it in at 18* ?
     
  4. MaverickDan

    MaverickDan I wanna go fast!!!

    Joined:
    Jan 1, 2007
    Messages:
    808
    Likes Received:
    45
    Trophy Points:
    113
    Garage:
    1
    Location:
    Midlothian, VA.
    Vehicle:
    73 Maverick 4dr
    Locking the timing or distributor means that your timing is always set to 18* with no advance/retard.
     
  5. MikeG747

    MikeG747 Member

    Joined:
    Apr 5, 2005
    Messages:
    1,516
    Likes Received:
    58
    Trophy Points:
    208
    Garage:
    1
    Location:
    Arkansas
    Vehicle:
    1973 Maverick Grabber, 347 4V w/F-1X, 1974 Maverick Grabber 302 4V, 1974 Maverick Grabber 302 2V, 1971 Maverick Grabber 302 4V.
    I think 18 will be the most you want to run. Definitely lock out your advance! I started with 12 and adjusted up to 15. I'm running about 9.5 PSI boost. Good luck. (y)
     
  6. elliot

    elliot Member

    Joined:
    Apr 12, 2003
    Messages:
    1,645
    Likes Received:
    5
    Trophy Points:
    111
    Location:
    Boubon MO
    Vehicle:
    76 4 door 347 paxton and t56
    I`m sorry if I sound stupid but how exactly do you mod the dist to lock in the timing? also don`t that make it hard to start ? What about drivability and milage around town ? Would I see any gains from running a dist like this http://www.summitracing.com/parts/MAA-1255104/ or is there a better set up ?
    I did some reading and learned how to turn my pump into a boost reference pump but as it is I have to run a regulator or my carb turns into a fountain so do I also need a boost reference regulator or ???

    Thanks guys !
     
  7. MikeG747

    MikeG747 Member

    Joined:
    Apr 5, 2005
    Messages:
    1,516
    Likes Received:
    58
    Trophy Points:
    208
    Garage:
    1
    Location:
    Arkansas
    Vehicle:
    1973 Maverick Grabber, 347 4V w/F-1X, 1974 Maverick Grabber 302 4V, 1974 Maverick Grabber 302 2V, 1971 Maverick Grabber 302 4V.
    To answer part of your question here is a pic showing the inside of my distributor. Tacked welded to lock advance. Does not make it hard to start and no drivability issues. Good luck! (y)
     

    Attached Files:

Share This Page