My EFI twin turbo build
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My EFI twin turbo build

  1. #1
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    Default My EFI twin turbo build

    Its a 8:1 468 BBC with 990 heads and a solid roller cam with .650 lift. Intercooler is built into the intake. Its a custom PFM setup. The turbos are ball bearing garret T6 turbos with I believe 91mm inlets. 1.23 A/r. It was setup in a v-drive daycruiser for speed skiing. Had an old motec injection on it. I am converting it to electromotive and going DIS. I am still in the process of mocking up, and now working on the water lines. I need help trying to figure it out. You can see most of the connections in the pics. I am not sure where to start, and where to run through. A little tricky since I only have one pickup(the pump). It has two connections at the water pump holes, two at the t-stat housing, two at the bypass, two at the back of the intercooler, one at the front of the intercooler, one at the bottom of each manifold, two at the top of each manifold, and two on the turbo adapter/spacers. So 19 in total... And of couse the range from -8 to -16, and one that is at least a -24. I am not worried about adapter to make it work, but just no sure how to plumb it. I help will be awsome

    Dan
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  3. #2
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    I do have two outlets. Forgot to mention that

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    Platinum Member BigSteve's Avatar
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    I would give Teague Marine a call.
    If you ain't the lead dog the view is always the same !

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    Senior Member cyclone's Avatar
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    To can tap the bowl of your jet for an additional water inlet. Just make sure to put a pressure regulator in the line.

  7. #5
    Spiral out MikeF's Avatar
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    Quote Originally Posted by cyclone View Post
    To can tap the bowl of your jet for an additional water inlet. Just make sure to put a pressure regulator in the line.
    Along with some kind of strainer that will keep sand out of the intercooler core.

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    Where would I tap the bowl? Around the same area as the prime a jet? What size can I tap it to? And last any pics for reference? Thanksdan

  9. #7
    LP-25.com Infomaniac's Avatar
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    Dan,


    Go from the pump to a sea strainer. Install a bypass type relief valve at the strainer inet to control pressure. And from there: Intercooler front - out of the rear of the intercooler to exhaust manifolds bottom. You probably want warmed up water going to the engine for the EFI. Out the top of exhaust manifolds with only 1 each to engine block inlet. Ditch the "T" stat housing plumbing. Exit the engine at the intake manifold in the front or something on the "T" stat housing. Turbo adapters last before exiting the boat.

    Post a good pic of the exhaust manifold tops to be sure. Bypass?

    Warm water to the engine. Pump - bypass - strainer - Intercooler - manifolds - engine - turbos.

    Lake temp water to engine. Pump - bypass - strainer - Intercooler - engine - manifolds - turbos.
    If For Some Reason I Do Something Worthy Of Recognition. God Provided The Ability And Deserves The Credit.


    QE 439 Twin Turbo

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    Highaboosta Unchained's Avatar
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    Those turbo's are bigun's

    It looks like you could remount your throttle bodies on the side of the intercooler box in line with the compressor outlet rather than in front and eliminate a lot of piping.

    Twin Turbo 1800 HP V-Drive lake boat

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

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  11. #9
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    I will post pics up in a day or two of the manifolds. I did check to see if I needed to run two outlets on the exhaust manifolds and looks like I dont. I blew air trough one side and had the inlet blocked off and it moved air out of the other outlet. So that two I can block off. Infomaniac thanks.

    Unchained, the throttle body is setup to use just one cable, and uses a gear setup ot open both at the same time, so I am going to leave that alone and deal with the plumbing. Besides I think the two "ram horms" look kinds cool.

  12. #10
    mo balls than $cents$ IMPATIENT 1's Avatar
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    jus logged in to say bitchin man thing is gna be stupid on the water go ahead and get the biggest damn impellor you can buy now

    Dare to be different, if it turns out great you can claim you planned it that way.

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    Thanks got a 9.5" dominator ss impeller. Hope its big enough

  14. #12
    senior member turbo wog's Avatar
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    that thing is sick

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    Here are the pics of the exhaust. I think I can eliminate the one with the fitting removed.
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  16. #14
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    Finally got my water line all plumbed for the engine. Only took me almost a week and ruin one fitting to figure out the intercooler inlet. I dont want to work with -16 again..
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