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  1. #1
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    3 litre wolf efi crankcase injected 3 litre build

    i'm in the process of putting together another 3 litre for the skater, the old one has 350 hours on it(the original wolf engine that i built) and is getting tired, i built that one figuring i was going to blow it up several times during the making of the fuel and spark maps and never did. that engine had 1700 hours on it when i ported and built it, basically i just honed it and put it back together w/ fresh rings and new bearings, so that engine owes me nothing! here's a pic of that engine
    action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build

  2. #2
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    that engine pushed my hydrostream virage stg3 to 109, and was beginning to die when it went on my 21 skater but still managed to run 99.9 mph. i had to build the wiring harness and fuel and spark maps, and ran it for 6 hours on a k&o propshaft dyno(and 60 gallons of fuel on the dyno) here's a pic of the wolf ecu and harness, i'm not even using half the functions of the wolf.
    action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build

  3. #3
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    i also used an omc test wheel to help build the curves, here's some video View My Video
    action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build

  4. #4
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    i tried initially to run gm ls series coils because they have the ignition drivers built in(so the ecu doesn't see high amperage, kind of like an electronic relay of sorts) but they didn't work, the engine would start to break up around 4500 rpm or so. the problem was they were never designed to do that, it would be like turning a v8 at 9k rpm. i ended up using optimax drivers/coils- the same ones used on an 01 300x. heres a pic of the ls coils
    action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build

  5. #5
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    the wiring harnesses are built from tefzel shielded aviation wire. i use gm weatherpack connectors and keep the ecu in the boat. the new engine started life as a 03 300x, i'm using the later style multi strike coils- they come on later 300x engines and most outboards after '04- supposedly they multi fire below 2k rpm. here's a pic of the new engine in mockup state- had to build the throttle linkage. i machined a set of injector bungs and welded them into the front half, i also cut up a 260 air horn and mated it up to the 3 litre intake flange, the butterfly is 7 mm larger, and i built a mount to install the 3 litre tps on the horn that will be driven of the throttle shaft. i'm running one of our 1" spacers made of composite, along w/ a custom reed plate. i have a ton more pics, but i have to load them up to tiny pic.
    Last edited by mrcrsr; 09-05-2012 at 07:04 AM.
    action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build

  6. #6
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    but wat do you think of this body ?
    you could even add a idle valve
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  7. #7
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    ronnie, is that throttle body assy off an etec? my machinist had the same idea, i ended up going w/ the horn, i can ck the map sensor readings and see if there is any vacuum at wot. getting ready to assemble the short block today.
    action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build

  8. #8
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    yes it is 4 months ago there was a 300 intake on sale on ebay
    on boats.net i think they charge $600+ for an assembly
    also keep an eye on your sparkplugs
    when i was running my S80 on the dyno my center sparkplugs seemed white as opposed to the others


    i set my center injectors slightly richer now
    strange as the original 849849 map does not compensate for this
    also i,m going to rework my spacerplate for a radius
    http://home.tiscali.nl/ronniestoys/Data/Bellmouth.zip
    after reading this
    kee the pictures coming
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    Last edited by PanRonnie; 09-05-2012 at 02:34 PM.

  9. #9
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    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  10. #10
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    Hey....you had me take a blood oath not to talk about this project! At least that's one less secret I need to keep.

    This looks bad ass.

  11. #11
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    great looking project charlie keep us informed,tim

  12. #12
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    Quote Originally Posted by mrcrsr View Post
    i can ck the map sensor readings and see if there is any vacuum at wot
    Charlie, If I remember my old data logs correctly vacuum disappeared after the throttle blades were opened even a small amount (0.100") from their Idle setting.

    Have you considered that Old Wolfie can control an IAC Valve? An IAC, MAF and a Ducted Cold Air intake would be really trick.

    Speaking of cold air where is your IAT sensor going to be?

  13. #13
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    Quote Originally Posted by PanRonnie View Post
    i set my center injectors slightly richer now
    I remember Wayne Taylor talking about this on center horn motors. He suspected that because the velocity stack pointed right at those cylinders they got more air than the others.

  14. #14
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    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  15. #15
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    It's gotta make more HP...
    I dont think its gotta choice but to scream now....


    • Hydrostream V-King with a Drag - SOLD
    • STV RR Drag with a Drag- SOLD
    • 18' seacraft c/c 200 merc- SOLD
    • 18' Action Marine Retired & "Wet"
    • STV Needle Nose " The Heat" - SOLD
    • 21' Triad- "The Sipper"- SOLD
    • 26' concept c/c twin 200 Mariners -SOLD
    • STV RR - "Lil Sista" on a Strongback Trailer
    • 18' Action Marine on a Strongback Trailer


    Everybody wants a piece of the pie, till they try it!!!


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