HEI questions.
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HEI questions.

  1. #1

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    Default HEI questions.

    Ok this is killing me, My Taylor has a BBO with a single point dist and i want to switch up to an hei or a nice duel point. What are the differences between a "marine dist" and a regular dist? I thought i knew but i cant get a deffinitive answer anywhere. Do i need the marine version or can i put a marine cap on it and call it good? If i do need the marine version where can i find one? Thanks again

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    Senior Member fleetimus's Avatar
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    If you have an open engine compartment, put a HEI in and enjoy.

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    Senior Member ol guy's Avatar
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    Quote Originally Posted by fleetimus View Post
    If you have an open engine compartment, put a HEI in and enjoy.
    Good info there but have it recurved to meet the needs of a water dyno. M

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    My engine is covered. Does that meen I need to run points? Also where can I have it re curved and what does that entail?

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    Senior Member Mcintyrelocal's Avatar
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    Dont worry if its open or not an HEI will work great no matter what just dont hold a water hose over it. Ive ran HEI's on a few boats and never had issues, Ive had more problems with MSD"s.

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    Senior Member fleetimus's Avatar
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    You should still be able to run an HEI. They are trouble free. The marine has a screen to quench a unwanted spark. Put a Hei in and run it.

  9. #7
    Senior Member ol guy's Avatar
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    Quote Originally Posted by Mcintyrelocal View Post
    Dont worry if its open or not an HEI will work great no matter what just dont hold a water hose over it. Ive ran HEI's on a few boats and never had issues, Ive had more problems with MSD"s.
    Regarding the MSD ign. I will never run another one in my life!!!!! And the water issue is about the advance curve for a boat instead of a car. My meaning is load variations vs a automotve application. HEI will run in a boat great just change the curve or optimum performance. and most good performance shops can point you in a direction of someone that can curve it for a boat. Vac cam and retard or advance. M

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    Senior Member Mcintyrelocal's Avatar
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    Quote Originally Posted by ol guy View Post
    Regarding the MSD ign. I will never run another one in my life!!!!! And the water issue is about the advance curve for a boat instead of a car. My meaning is load variations vs a automotve application. HEI will run in a boat great just change the curve or optimum performance. and most good performance shops can point you in a direction of someone that can curve it for a boat. Vac cam and retard or advance. M
    I wasnt commenting on your post, you are very right i was just reasuring him that hei's were good.Ii still run msd's Ive just had boxes go bad over the years and all the boats that ive put hei's in still run to this day. Lol.
    sorry about that.

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    Quote Originally Posted by ol guy View Post
    Regarding the MSD ign. I will never run another one in my life!!!!! And the water issue is about the advance curve for a boat instead of a car. My meaning is load variations vs a automotve application. HEI will run in a boat great just change the curve or optimum performance. and most good performance shops can point you in a direction of someone that can curve it for a boat. Vac cam and retard or advance. M
    So as far as recurving it you meen tuning it like you would for a stall converter versus a street car? From what im gathering the main dif is the cap with the vent right? Summit sells a drop in hei for 179$ and the msd hei is 600? im running 325hp in a stock 455 will i be ok with the 179$ version or do i need to drop some cash?

  12. #10
    "Try it Now!" Tahiti Boss21's Avatar
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    i had a points mallory dist. up until about 7 years ago. I switched to the mallory marine dist..electronic..had no problems ever since. It still called for a ballast resistor though. Just my 02c. It's the one with the blue cap. Correct me if i'm wrong,,but aren't the OLDS HEI units very pricey? If i remember correctly that's the only reason i didn't go with one.
    1992 Eliminator Daytona 21'

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    There more expensive than BBC stuff but the prices seem pretty fair. Under 200$ for a drop in HEI shipped from summit. But i spend 300 buks on tires every sunday and im happy about that so i dont really know shiat about value

  14. #12
    jetboataholic HawaiianJet's Avatar
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    I just switched my POS Mallory points dizzy over to a Mallory Unilite distributor. I got the non-marine one because I have a tall deck and I couldn't find the Marine ones for the tall deck. But I put the blue marine cap, off my points dizzy, on my new one and it seems to be working fine, for now. But I have an open engine bay, so I wasn't very concerned about it in the first place.

    Good luck.
    HJ

    ***FOR SALE*** 1978 19' Full Stringer Hawaiian Molokai Jet Boat w/ Berkeley 12JC-AB and Chevy 440 Tall Deck ***FOR SALE***

    Quote Originally Posted by mako shark mark View Post
    Oh yeah, Forgot to mention that the hull is a special mixture of speedcote, herculiner and rain-x, all blended together- good for another 8 mph top end.

  15. #13
    Senior Member ol guy's Avatar
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    Quote Originally Posted by Mcintyrelocal View Post
    I wasnt commenting on your post, you are very right i was just reasuring him that hei's were good.Ii still run msd's Ive just had boxes go bad over the years and all the boats that ive put hei's in still run to this day. Lol.
    sorry about that.
    Hey Mac, I ran an msd one time and after the third box took a dive I will run an HEI anyday. The only reason for a marine app. is spark Flying in the wrong direction for USCG regs. As far as recurve goes the demands on a marine motor are alittle different than a automotive demand. If it were me and I wanted to make the switch on an olds 455 I would go to a wrecking yard and pick-up a 78 thru 80 core take it to a ignition shop likes Hays Ign. In California (they are on the web ) tell 6them what its for and spend another buck and have a distributor that will not fail and if by chance it does the parts are available at any local parts store. M

  16. #14
    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by Tahiti Boss21 View Post
    ... I switched to the mallory marine dist..electronic..had no problems ever since. It still called for a ballast resistor though.
    The magnetic breakerless or unilite?
    Both come in Mallory "marine".
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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