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Efi?

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    jetboataholic HawaiianJet's Avatar
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    Question Efi?

    I can't recall coming across any EFI jet boats on this forum. Everybody has carburetors. Even on the racing jet boats. Is there a reason for this? I always figured fuel injection was better on boats because of all the bouncing around and everything. Plus it gets better fuel economy and is more efficient for the engine. My dream boat, is a jet boat with a fabricated intake manifold and an EFI system, and a twin turbo setup. But, I've even seen carbureted twin turbo setups, which was something I had never seen before I came to this site. Why no EFI systems on jet boats? Thank you.
    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.

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    Senior Member LuckyDaze's Avatar
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    There are tons of boats out there with EFI. The mass majority of them being the newer boats. There are also quite a few with mechanical fuel injection like the hilborne setups ect. I prefer carb's over EFI because water and electronics don't mix. My boat sits low enough it the water that I get some coming over every now and then, I just wouldn't want to have more electronics to worry about than I have to. As for EFI getting better mileage than Carbs, thats highly debatable. EFI's have a tendency to get better mileage because the owner can sit down with a lap top and program in a better fuel curve. It takes more tinkering and know how to setup a carb the right way. My carbs get excellent fuel mileage.

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    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by LuckyDaze View Post
    There are tons of boats out there with EFI. The mass majority of them being the newer boats. There are also quite a few with mechanical fuel injection like the hilborne setups ect. I prefer carb's over EFI because water and electronics don't mix. My boat sits low enough it the water that I get some coming over every now and then, I just wouldn't want to have more electronics to worry about than I have to. As for EFI getting better mileage than Carbs, thats highly debatable. EFI's have a tendency to get better mileage because the owner can sit down with a lap top and program in a better fuel curve. It takes more tinkering and know how to setup a carb the right way. My carbs get excellent fuel mileage.
    I know the big boats all have them. I'm only talking about small boats, like jets and V's with custom EFI systems. I'm just curious because I've grown up with fuel injection. The only carbureted vehicles I've driven are old farm trucks. Oh yeah, and fork lifts. Thanks.
    Last edited by HawaiianJet; 04-29-2008 at 08:48 PM.
    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.

  5. #4
    Senior Member LuckyDaze's Avatar
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    I think Todd is running a mechanical fuel injection setup on his TPR.... Maybe he'll chime in.

    ~Brian

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    Highaboosta Unchained's Avatar
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    Quote Originally Posted by HawaiianJet View Post
    I can't recall coming across any EFI jet boats on this forum. Everybody has carburetors. Even on the racing jet boats. Is there a reason for this? I always figured fuel injection was better on boats because of all the bouncing around and everything. Plus it gets better fuel economy and is more efficient for the engine. My dream boat, is a jet boat with a fabricated intake manifold and an EFI system, and a twin turbo setup. But, I've even seen carbureted twin turbo setups, which was something I had never seen before I came to this site. Why no EFI systems on jet boats? Thank you.
    I've been running EFI and twin turbos for years.
    I've been real happy with it and would never go any other way.
    Lots to learn about it to put the system together. Not a system for someone who doesn't want to read up and study the ins and outs of it. Some computer knowledge is good too.

    You can get a nice Edelbrock manifold that is EFI ready with fuel rails. I just got a new one for a tall deck block. $ 350.00

    I have my old one for sale for $ 150.00

    As far as water and electronics not mixing ...... never had a problem. They are all weathertite connectors. I guess if you sunk the boat it may not like it though.

    Quote Originally Posted by HawaiianJet View Post
    The only carbureted vehicles I've driven are old farm trucks.
    Sorry, I just couldn't resist...........LOL
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    Last edited by Unchained; 04-29-2008 at 04:16 PM.

    Twin Turbo 1800 HP V-Drive lake boat

    http://s621.photobucket.com/albums/t...t=MAH05771.mp4

    Quote Originally Posted by Trigger View Post
    No one cares about your buddies old antiquated garden hose technology.
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    Cantard 71hallett's Avatar
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    Quote Originally Posted by HawaiianJet View Post
    I can't recall coming across any EFI jet boats on this forum. Everybody has carburetors. Even on the racing jet boats. Is there a reason for this? I always figured fuel injection was better on boats because of all the bouncing around and everything. Plus it gets better fuel economy and is more efficient for the engine. My dream boat, is a jet boat with a fabricated intake manifold and an EFI system, and a twin turbo setup. But, I've even seen carbureted twin turbo setups, which was something I had never seen before I came to this site. Why no EFI systems on jet boats? Thank you.
    We are in the middle of taking the efi of one of our turbo setups and putting on a carb. Proven fact that carbs have far better drivability than efi.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

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    jetboataholic HawaiianJet's Avatar
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    Yeah, I've seen that and it looks fricken sweet! I love the stacks!

    But here's one thing I don't understand. How do the MFI's work? And how is that system any different than a Carburetor? Because all a carburetor is, is a mechanical method for injecting fuel and air into the engine. Right?

    Thanks.

    Quote Originally Posted by 71hallett View Post
    Proven fact that carbs have far better drivability than efi.
    Maybe on a boat. But, not if you're talking about my little drive about car. I can't make that thing quit. Gets 30 mpg too.
    Last edited by HawaiianJet; 10-17-2008 at 08:29 PM.
    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.

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    Cantard 71hallett's Avatar
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    Quote Originally Posted by HawaiianJet View Post
    Maybe on a boat. But, not if you're talking about my little drive about car. I can't make that thing quit. Gets 30 mpg too.
    True, I am talking about 8-900hp pump gas setups.
    Quote Originally Posted by gn7 View Post
    It would be a balmy 85* in Steel's shop if he would move a little faster

  10. #9
    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by 71hallett View Post
    True, I am talking about 8-900hp pump gas setups.
    I am too. That was just a little brain fart.

    But, I would think that at those hp's, EFI would be better because it can spray an atomized mix of gas and air directly into the cylinder heads. Whereas a carburetor just dumps it into the cylinder heads. But I don't know, that's why I started this thread. Thanks.
    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.

  11. #10
    Senior Member NiceGuyEddie's Avatar
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    Lots of electonics mean lots of wire... this means lots of purple zip ties

  12. #11
    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by rIVERtRASH View Post
    Lots of electonics mean lots of wire... this means lots of purple zip ties
    That's only on your boat. Mine boat only sees the black ones.
    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.

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    Just Me snoc653's Avatar
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    Quote Originally Posted by rIVERtRASH View Post
    Lots of electonics mean lots of wire... this means lots of purple zip ties
    Sorry had to qoute you so I could read your entire post...... my eyes would only move so far away from your avitar.

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    Im guessing that the money spent on efi and the hassle/time to get it dialed in wouldnt be worth it. I personally would like to do it but I like the simplicity of a nice carb motor. A properly tuned carb will do pretty good on power and mpg. Im running a spreadbore double pumper holley with mechanical secondaries and I get the best mileage and similar power running against some buds with the same boat. I can also stay out of the secondaries and still stay on plane when just cruising around.

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    Super Moderator HammerDown's Avatar
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    How bout 4 downdraft or sidedraft Dellorto's on a V8!
    <img src=http://www.performanceboats.com/gallery/data/500/medium/06-30-11_1234.jpg border=0 alt= />

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