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HEI question

  1. #1
    Senior Member H20MOFO's Avatar
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    Default HEI question

    I have been rockin the same dizzy for quite a few years.....locked out. A week or so ago I decided to roll a few more degrees into her to try and make mo powa.
    I jumped it up to 42 on the light at idle.
    For what ever reason I decided to give her a little gas. Pretty much immediately it started pulling timing out. Looked like 4*....it was at least 3*
    I have often heard that an hei will loose a little timing with RPM.....but I never would have thunk 4 degrees.
    Everything APPEARS to be locked......it has a vac can.....but I welded it in place so it cant move around.
    Is that " normal" for it to be loosing that much timing??
    Another Hot Boat refugee

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  3. #2
    Senior Member Hass828's Avatar
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    Quote Originally Posted by H20MOFO View Post
    I have been rockin the same dizzy for quite a few years.....locked out. A week or so ago I decided to roll a few more degrees into her to try and make mo powa.
    I jumped it up to 42 on the light at idle.
    For what ever reason I decided to give her a little gas. Pretty much immediately it started pulling timing out. Looked like 4*....it was at least 3*
    I have often heard that an hei will loose a little timing with RPM.....but I never would have thunk 4 degrees.
    Everything APPEARS to be locked......it has a vac can.....but I welded it in place so it cant move around.
    Is that " normal" for it to be loosing that much timing??
    Probably have a pretty worn/stretched timing chain.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

  4. #3
    Senior Member H20MOFO's Avatar
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    I hope not.....the entire motor has had less that 15 gal ran through it. I am wondering if the up and down "play" between the gear and dizzy housing is a factor.
    Another Hot Boat refugee

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  6. #4
    Senior Member Hass828's Avatar
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    Quote Originally Posted by H20MOFO View Post
    I hope not.....the entire motor has had less that 15 gal ran through it. I am wondering if the up and down "play" between the gear and dizzy housing is a factor.
    Lots of little things can cause it. I just told you what I have had issue with. Heres a good read on the subject.
    Distributor Installation Practices - Shaft Play And Depth - Circle Track Magazine
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

  7. #5
    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by Hass828 View Post
    Lots of little things can cause it. I just told you what I have had issue with. Heres a good read on the subject.
    Distributor Installation Practices - Shaft Play And Depth - Circle Track Magazine
    Thanks....will check that link out.
    Another Hot Boat refugee

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