Holley EFI install
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Holley EFI install

  1. #1
    Off Road Badass Bonzen's Avatar
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    Default Holley EFI install

    Just finished the Holley Terminator EFI install on my 21' jet. 950cfm throttle body, with (4) 85#/hr injectors. Motor fired right up and idled in my driveway. Going to time it and test at the lake this weekend, hope she runs well! I don't know anyone thats ran this setup so definitely in uncharted waters.

    For A/F feedback to the ECU, I cnc'd a custom aluminum spacer for the wideband O2 sensor, that sandwiches between the manifold and riser, and keeps the sensor dry.
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    Last edited by Bonzen; 06-20-2017 at 09:56 AM.
    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

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    Senior Member Boat 405's Avatar
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    Looks great, you'll want to change those water supply lines to the motor and to the exhaust, those aren't rated for much heat. Get some good black lines designed for heat.
    Boat 405.

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    Off Road Badass Bonzen's Avatar
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    Quote Originally Posted by Boat 405 View Post
    Looks great, you'll want to change those water supply lines to the motor and to the exhaust, those aren't rated for much heat. Get some good black lines designed for heat.
    Ive ran them for 3 seasons, I change them out every season. Without a Tstat, the water temp never hits over 155. The lines are rated at 175 degrees. So I'm safe, but I see your point of caution. What would be the way to go, just standard automotive heater hose? Not sure if thats rated for high psi like what the jet drive generates. This nylon hose is rated at 250 psi.
    Last edited by Bonzen; 06-20-2017 at 02:44 PM.
    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

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    Off Road Badass Bonzen's Avatar
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    Update, engine runs like a champ! I almost doubled my gas mileage too. Ran from London bridge in Havasu up to Pirates cove and back last weekend and used just over 20 gallons of gas (and I was between 3500 and 5k the whole way there and back) Thats about a 50 mile round trip.

    The power band is much better with zero "flat spots" and of course all the on the fly tuning capability is awesome.
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    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

  7. #5
    Or Seth, either one Budweiser's Avatar
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    Congrats

    Glad it's working well for you.

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    Off Road Badass Bonzen's Avatar
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    Quote Originally Posted by Budweiser View Post
    Congrats

    Glad it's working well for you.
    Thank you. It feels good to do something out of the box and have it work.

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    LP-25.com Infomaniac's Avatar
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    Great job man.
    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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    We just finished installing a Holley HP system on a friends 29' Cobra party cat. 10-71 blower with eight 160 # injectors above the blower and running E85 fuel. The owner previously had two 1050 Holley Dominator dribblers. The motor runs stronger, smoother and starts better than ever before.
    I have been a FAST XFI fan for years but if I had to start another EFI program I would go with the Holley HP. The main purpose of the switch over was to run E85 which is made at a plant 25 miles from here. 99 cents / gallon right at the plant. E 98 is $ 2.00 / gallon.

    He ran against a twin engine Fountain with whatever built up motors and was out front at 105.
    Then the guy with the Fountain said he wasn't running it WOT. New motors, break in time, blah blah, Gee no one has ever said that before.
    I don't think he liked being passed by a party cat.
    I suggested he sell the roots, put a real compressor on it, go to sequential port injection and break some parts properly.

  11. #9
    Steady Rollin
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    Awesome Bonzen

    I think I spotted a pic of your engine bay on instagram earlier in the week or week previous and wanted to ask you about how you liked it but I didnt want to bug.

    My main question was how you manged to keep the O2's dry and happy. Perfect solution.

    You've put the wheels in motion in my head for sure.
    The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
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    Off Road Badass Bonzen's Avatar
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    The spacer I CNC'd seals off the O2 from the water jackets. It puts the tip of the sensor into the exhaust passage in between the manifold and riser. I have put 2 seasons on that setup and haven't fouled an O2 yet. There wasn't one available for sale that fit my exhaust dimensions so I have to make my own.

    The only thing holding back my motor now is the heads haha. But thats a whole other can-o-worms
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    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

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    Off Road Badass Bonzen's Avatar
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    Oh and I switched out the waterlines for 350 degree silicone heater hose
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    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

  14. #12
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    Quote Originally Posted by Bonzen View Post
    The spacer I CNC'd seals off the O2 from the water jackets. It puts the tip of the sensor into the exhaust passage in between the manifold and riser. I have put 2 seasons on that setup and haven't fouled an O2 yet. There wasn't one available for sale that fit my exhaust dimensions so I have to make my own.

    The only thing holding back my motor now is the heads haha. But thats a whole other can-o-worms
    nice, those look similar (if not the same) as the Indmar manifolds I have for mine.

    Seems like a great solution.

    I was talking to the guys at fiTech at some car show, he suggested I could also just tune it on the dyno and then run it open loop in the boat. It would get the job done, but really you lose the good dynamic tuning benefits.
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    Are you pulling water temp from that manifold sending unit i see?


    Did you tune the open to closed loop transition temp? I imagine you'd have to dial it down since water temp on a boat is so much lower
    Last edited by sintax; 07-26-2017 at 11:08 AM.
    The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
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  16. #14
    Off Road Badass Bonzen's Avatar
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    Quote Originally Posted by sintax View Post
    Are you pulling water temp from that manifold sending unit i see?


    Did you tune the open to closed loop transition temp? I imagine you'd have to dial it down since water temp on a boat is so much lower
    The water temp never hits 160 degrees unless I'm idling in warm water. The O2 still provides A/F ratio feedback and he was able to take that into account, but it was basically doing it the old fashioned way. Set a ratio in the fuel table, run it WOT, pull plugs, look at the color, etc... The ECU is locked in with a closed loop tune from idle to WOT that he set. It runs the same no matter what, and seems to be correct. There are set A/F ratios in the tune that the computer will always adjust fuel mixture to attempt to hit however, I'm pretty sure that is the only ECU "adjustment" it makes. So if the O2 detects a lean mixture outside of the tuned in set parameters, it will tell the ECU to add more fuel to try to hit that ratio that he set.

    Thats how I understand it. Without the engine operating above 160 at cruise and WOT, the Holley ECU would never "self tune" the AF ratio, and I would be stuck with the stock factory loaded program. So my tuner had to do all that. Obviously there are many other areas you can tune in...idle, AE, spark timing, IAC control, blah blah. Overall I'm very happy, going from a pretty much non-tunable MEFI 1 with a 2 barrel TBI to the Holley kit.
    "I'd love to help you out wags, but there is larger issue concerning breast cup sizes on another thread that we have to work thru first. This subject suddenly became a non issue." - GN7

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