Setting the advance on MSD Dizzy for BBF
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Setting the advance on MSD Dizzy for BBF

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    Senior Member Rain Maker MN's Avatar
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    Default Setting the advance on MSD Dizzy for BBF

    I am setting up my MSD dizzy and wanted to make sure I am thinking correctly. It comes with the two heavy silver springs installed and the blue 21 degrees bushing installed.

    I was going to change to the two light silver springs which will have my advance all in by what appears to be 2900 RPM's, according to what I can see on the MSD advance curve chart?

    Then I was going to change to the Silver bushing for the advance stop, which is 25 degrees...

    So about 9 degrees with the springs and 25 degrees with the advance stop ....all in at 34 degrees on my 10 to 1 compression BBF 460 @ 2900 RMPS?

    ISKY CAM - IRON heads - rewarder headers, full roller motor

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    Co-Founder of SHB MarKist's Avatar
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    lock it out and call her done ..!!

    Markist
    "Life is SO much better now......

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    Senior Member Rain Maker MN's Avatar
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    Your joking right?

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    Senior Member 787chuck's Avatar
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    bring all the timing in by 2500 that way it will run nice and clean when your just cruzzing around and play with the total when i was running a ford it seemed to like allot of timing

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    Senior Member Josh@JBP's Avatar
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    Quote Originally Posted by Rain Maker MN View Post
    I am setting up my MSD dizzy and wanted to make sure I am thinking correctly. It comes with the two heavy silver springs installed and the blue 21 degrees bushing installed.

    I was going to change to the two light silver springs which will have my advance all in by what appears to be 2900 RPM's, according to what I can see on the MSD advance curve chart?

    Then I was going to change to the Silver bushing for the advance stop, which is 25 degrees...

    So about 9 degrees with the springs and 25 degrees with the advance stop ....all in at 34 degrees on my 10 to 1 compression BBF 460 @ 2900 RMPS?

    ISKY CAM - IRON heads - rewarder headers, full roller motor
    You got the right idea, however with the light springs you may get an erronious reading trying to set base timing , my advise is to set total timing with your desired advance bushing and let base timing fall where it wants to. Depending on your idle speed the springs may already be advancing a bit. I would suggest one light silver and one blue spring, you may have less timing fluxuations at idle, especially if you have a lumpy cam.
    -Josh

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    Senior Member Schiada 201's Avatar
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    run the black stop with the light springs, however the varibles of production equipent is not always the same. the mentioned lock the dist is the way it;s already there. However if you get it too high you will work the starter to death, then you will have to buy a start retard box, more money. I have one of my boats with the dizzy locked out works like a champ. My 460 I removed the dizzy and replaced with a 2 wire HEI works like a champ.

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    Bring the timing as quickly as possible.

    If you're stopping the total @ 34, your leaving power on the table with Iron Heads.

    Turtle's engine has ported Iron Heads. It is run between 38 and 40 degrees.

    JMHO.

    RR

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    Quote Originally Posted by Rain Maker MN View Post
    Your joking right?
    Nope!

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    Driver 78CoLeBBF's Avatar
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    Quote Originally Posted by Warp Speed View Post
    Nope!
    I would lock it out at 34* and bet you wouldnt see much gain if any if you added more timing you do have flat tops rite what year iron heads
    Its a FORD thing chevy's arent quick enough to understand

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    Senior Member Rain Maker MN's Avatar
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    Quote Originally Posted by RiverRacer View Post
    Bring the timing as quickly as possible.

    If you're stopping the total @ 34, your leaving power on the table with Iron Heads.

    Turtle's engine has ported Iron Heads. It is run between 38 and 40 degrees.

    JMHO.

    RR
    Mine are straight up Iron heads....1978's or very close to that.....and yes I have flat top pistons.... Previous owner said it was 10 1/2 to 1

    38 to 40 seems like a lot? The reason I was aiming for 34 was because I thought I read somewhere people were running 460's and 34 to 36 was the sweet spot?

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    Driver 78CoLeBBF's Avatar
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    Quote Originally Posted by Rain Maker MN View Post
    Mine are straight up Iron heads....1978's or very close to that.....and yes I have flat top pistons.... Previous owner said it was 10 1/2 to 1

    38 to 40 seems like a lot? The reason I was aiming for 34 was because I thought I read somewhere people were running 460's and 34 to 36 was the sweet spot?
    I dought you got 78 heads on your engine look just below the valve cover in between the exhaust ports and tell us what numbers and letters ther is in order cause flat tops and D3 heads is only 9.5-1
    Its a FORD thing chevy's arent quick enough to understand

  14. #12
    Senior Member H20MOFO's Avatar
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    I bet if you locked it out you'd like it. Maybe you could test it both ways
    Another Hot Boat refugee

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    Quote Originally Posted by 78CoLeBBF View Post
    I would lock it out at 34* and bet you wouldnt see much gain if any if you added more timing you do have flat tops rite what year iron heads
    Quote Originally Posted by Rain Maker MN View Post
    Mine are straight up Iron heads....1978's or very close to that.....and yes I have flat top pistons.... Previous owner said it was 10 1/2 to 1

    38 to 40 seems like a lot? The reason I was aiming for 34 was because I thought I read somewhere people were running 460's and 34 to 36 was the sweet spot?

    Remember , you're not dealing with Yates Fast Burn Chambers with Ford Iron Heads. If I set Turtle's engine up at 34, It'd lose at least 150 rpm(we've tried).

    You said "Full Roller" to I assumed you had all the matching items in your build. IF you do, you're leaving power on the table at 34 degrees with Iron Heads.

    That's all I have to say. It's your's, so you can run it as you see fit.

    RR

    PS. If it was an FE, it'd be between 38 and 42 to be right with Iron Heads, FYI.

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    Senior Member Need4Speed77's Avatar
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    Quote Originally Posted by MarKist View Post
    lock it out and call her done ..!!

    Markist
    I concurr.

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