BBF Timing/Dwell/Gap
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BBF Timing/Dwell/Gap

  1. #1
    History Repeating Storz's Avatar
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    Default BBF Timing/Dwell/Gap

    Yes my engine is old school and has points, hopefully this winter I'll be upgrading to an MSD system, but for this summer its not in the cards.

    That being said I've never had to set dwell and gap on an engine before, can anyone tell me what the correct specs for a basically stock 460 BBF would be?

    How about timing?

    Thanks!
    '84 Laser LTV - Restoration in progress
    '77 Caribbean
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    The Brown Bomber oldmudwiser's Avatar
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    hey check out some ford truck forms they allways help me out if no one here can. im still running points too..lol
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  4. #3
    Senior Member Luckie Stiff's Avatar
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    Do yourself a favor, spend the $100 or so and get a pertronix setup or an Accell points eliminator kit, you'll be way happy in the long run...

    Pertronix http://www.summitracing.com/parts/PNX-91281/

    Accel http://www.summitracing.com/parts/ACC-2010/

    FWIW- The Accel setup is identical to Mallory Unilite.

    Good luck.
    "Don't you realize that there are already enough people in the world to hate without you putting in so much effort to give me another?"
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  6. #4
    History Repeating Storz's Avatar
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    Quote Originally Posted by Luckie Stiff View Post
    Do yourself a favor, spend the $100 or so and get a pertronix setup or an Accell points eliminator kit, you'll be way happy in the long run...

    Pertronix http://www.summitracing.com/parts/PNX-91281/

    Accel http://www.summitracing.com/parts/ACC-2010/

    FWIW- The Accel setup is identical to Mallory Unilite.

    Good luck.
    Thanks for the heads up, for this season I am going to keep running the points and then just upgrade over the winter to MSD
    '84 Laser LTV - Restoration in progress
    '77 Caribbean
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    Senior Member jetboatperformance's Avatar
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    Storz set the point gap at .018 to .022 and if your inclined to check dwell with a dwell meter it should be around 30* , remember dwell changes timing (not vice versa) Timing will depend on a multitude on things eg altitude , compression etc You could probably start around 34* total and likely bit more on a bone stock low compression deal Tom
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  8. #6
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    Quote Originally Posted by jetboatperformance View Post
    Storz set the point gap at .018 to .022 and if your inclined to check dwell with a dwell meter it should be around 30* , remember dwell changes timing (not vice versa) Timing will depend on a multitude on things eg altitude , compression etc You could probably start around 34* total and likely bit more on a bone stock low compression deal Tom
    Thanks!
    '84 Laser LTV - Restoration in progress
    '77 Caribbean
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  9. #7
    Senior Member jet460's Avatar
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    I put in a Pertronix ignitor in my Accell dual points distributor, and a used MSD box/coil in my 460 this year. Gapped the plugs at .050 and that's that. Runs perfectly.
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  10. #8
    burnt mexican incorprated mirrorimage's Avatar
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    ive been trying to get my dad to run my spare dist and get rid of the points ... i switched over to an msd polled the acell diist out and keep in in the box just in case he has a problem .. my boat ran ok with the points .when i did the change over to pertronics it was so much better now that i have a 6al and a dist. im never going back but ill keep it around for a spare cause you never know
    WHAT THE HELL WAS THAT !!! !
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  11. #9
    Senior Member jet460's Avatar
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    At $80 for 2 sets of points, it was cheaper to buy the Pertronix unit anyway...Know wutta mean...
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  12. #10
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    What MSD set up are you guys running? Will the dizzy clear a tunnel ram?
    '84 Laser LTV - Restoration in progress
    '77 Caribbean
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  13. #11
    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by Storz View Post
    What MSD set up are you guys running? Will the dizzy clear a tunnel ram?
    I'm running the MSD distributor with a 6AL box and blaster II coil. MSD makes several different types of distributors for the BBF. There are two mechanical advance ones that work well on jetboats, but only one will fit with a tunnelram. Model #8577 has the smaller cap and squeezes in. It's a nice unit with the positive lock hei style wires/cap, and a screw down cap w/ wire retainer. Even though it's made for use with tunnelrams and blowers, it's still really tight.

    The one with the big cap won't fit at all with a tunnelram. I believe the one with the big cap is the #8580. I bought that one by mistake on the first go round. Knew it wasn't gonna fit as soon as I got it home and had to return it.

    #8577 Distributor

    This is the coil I went with. They have lots of other types though. I think this one was the least expensive and they consider it the stock replacement rather than race or street strip.

    Blaster II coil
    Last edited by Squirtcha?; 04-28-2010 at 06:09 AM.
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  14. #12
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    Great info, thanks
    '84 Laser LTV - Restoration in progress
    '77 Caribbean
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  15. #13
    Glendale Arizona Squirtcha?'s Avatar
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    Not a problem. I just made the switch at the end of last season, so still fresh in my mind.
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  16. #14
    Senior Member jet460's Avatar
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    You can trigger the MSD with anything.
    Made a bracket for the box.
    I just left my Accell distributor in, tossed the points and the ballast resistor, and put the Pertronix unit in it.



    Here's how she runs...Oh sure, there a lot of better boats on here to say the least, but I have fun with what I have.

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