Holley Terminator EFI kit
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Holley Terminator EFI kit

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    Off Road Badass Bonzen's Avatar
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    Default Holley Terminator EFI kit

    Anyone have any experience with this? I can get a good deal on the full kit with the fuel system.

    I'm currently running an over-bored & custom 2 barrel TBI with qty (2) injectors on my 454. MEFI 1 ecu old skool tech... I know the thing isn't getting enough fuel and air, wanted to stay injected as opposed to going carb. The O2 sensor mounting wouldn't be an issue as I have already developed a dry adapter plate for the wet logs that has proven to work with the current wide-band A/F gauge & sensor I'm running.

    My main question is would this unit and software function the same on a jet boat motor as it would on a big block in a car...mainly would it "see" engine load the same (impeller loading vs tires on pavement) or is this a non-issue?
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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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    I have some experience with a Holley HP EFI.
    There were a lot of great features on it but there were some that I liked the FAST XFI better.

    If you have'nt bought this yet I would suggest that buying on price is not the best way to go for EFI.
    Pick out what features are important to you and get the system that has them.
    Consider what your ultimate HP goal is.

    Some important features to consider,
    Closed loop wideband O2 sensor
    Datalogging
    Reads in Lambda
    Self tuning
    Inputs for multiple sensors
    Has a fuel energy constant input for running different fuels
    CAN link capable

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    Or Seth, either one Budweiser's Avatar
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    Quote Originally Posted by Bonzen View Post
    Anyone have any experience with this? I can get a good deal on the full kit with the fuel system.

    I'm currently running an over-bored & custom 2 barrel TBI with qty (2) injectors on my 454. MEFI 1 ecu old skool tech... I know the thing isn't getting enough fuel and air, wanted to stay injected as opposed to going carb. The O2 sensor mounting wouldn't be an issue as I have already developed a dry adapter plate for the wet logs that has proven to work with the current wide-band A/F gauge & sensor I'm running.

    My main question is would this unit and software function the same on a jet boat motor as it would on a big block in a car...mainly would it "see" engine load the same (impeller loading vs tires on pavement) or is this a non-issue?
    To add to Marks great response and to answer to your main question, yes it will work fine. But, may or may not provide a worthwhile performance increase.

    Is there something that leads you think you're not getting enough air and fuel with your current set up? How much manifold vacuum is it pulling at wide open throttle? You mentioned you have run an O2 gauge. Is it leaning out on the top end? What's it reading at sustained wide open throttle?

    The main indicator of not enough air capacity will be anything numerically more than 2-3"Hg of manifold vacuum at wide open throttle. If it's not more than that, power gains from additional air flow are certainly still available, however they may not be what you expect for the time and money invested. For reference, between 1"Hg and zero vacuum is optimal.

    If you're running out of injector and leaning out on the top end, a throttle body system like that is a good, simple, cost effective way to allow the use of modern injectors, if it does in fact use standard style injectors.

    If it's not leaning out and manifold vacuum is not more than 3"Hg, I personally wouldn't change what you have if it's functioning well, unless you wanted to do other upgrades too. And if upgrades are on the table, I'd go straight to port injection with a injector in each runner and an ECU that has all the functions you may need, which Mark covered.
    Last edited by Budweiser; 01-21-2017 at 02:34 AM.

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    Off Road Badass Bonzen's Avatar
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    I'm constantly reading on the lean side according to my wideband gauge and the motor falls on it's face at the 3/4 throttle mostly. At WOT it runs fairly well. My tuner who is a MEFI 1 expert cannot figure out why it runs lean and has this issue, everything checks out good. Vacuum is good at 3/4 throttle and WOT he says. Not sure the exact numbers I don't have any print outs but we have gone over it on multiple lake tests.

    I have put a new fuel pump in it, changed fuel lines, filters, regulators, played with fuel pressure, added timing, removed timing, all new ignition components, re-did all the grounds, hardwired the fuel pump to the battery, added a booster pump, checked flow, checked and verified fuel pressure on the fly, checked the pickups in the tanks....literally everything. My tuner is stumped. the only thing we can come up with is it's just not getting enough fuel volume and/or the factory undersized injectors are going static.

    If the Holley system will function on a jetboat motor the same way it will on a car, I'm sold for the price.

    Motor is a BBC 454 bored .030 over with 10:1 compression forged pistons and a mild cam. Stock iron heads with the exception of upgraded 3/8" cromoly pushrods and dual valve springs. I run 91 octane in it all the time.
    Last edited by Bonzen; 01-24-2017 at 01:07 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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    Or Seth, either one Budweiser's Avatar
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    Quote Originally Posted by Bonzen View Post
    If the Holley system will function on a jetboat motor the same way it will on a car, I'm sold for the price.
    It will work equally as well in a boat, car, or lumber mill. Still needs to be tuned to your engine. One thing to be aware of and check out before you buy, is the injectors flow rating and if they will support the power level you expect. If not, you might wanna check into the cost of replacements that will suit your engine, and take that into consideration toward the total cost to you.

    Without specific figures, there's no saying where you're at currently. Inconsequential if you're already sold on the new unit though.

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    Quote Originally Posted by Budweiser View Post
    It will work equally as well in a boat, car, or lumber mill.
    I like that one

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    Quote Originally Posted by Budweiser View Post
    It will work equally as well in a boat, car, or lumber mill. Still needs to be tuned to your engine. One thing to be aware of and check out before you buy, is the injectors flow rating and if they will support the power level you expect. If not, you might wanna check into the cost of replacements that will suit your engine, and take that into consideration toward the total cost to you.

    Without specific figures, there's no saying where you're at currently. Inconsequential if you're already sold on the new unit though.
    10-4. It's self learning on the fly with the included AF sensor and supposedly works well from talking to people I know that are running it on cars and trucks. It also has a digital input display to answer a bunch of engine parameter questioner to get you in the ball park right off the bat. I'm sold on the system because everything sounds good and I can get the setup for half of what Summit sells it for. Supposedly supports around 600hp and I'm pushing 400 max. Thanks for the info.

    Quote Originally Posted by Mark55 View Post
    I like that one
    Ive said for years this forum needs a "like post" button...mods???
    "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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    My motor setup and the sensor adapter plates I machined.
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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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    Quote Originally Posted by Bonzen View Post
    10-4. It's self learning on the fly with the included AF sensor and supposedly works well from talking to people I know that are running it on cars and trucks. It also has a digital input display to answer a bunch of engine parameter questioner to get you in the ball park right off the bat.
    Let me explain "self learning"
    Self learning is going to correct the main fuel table to follow the target A/F ratio table that YOU set up and that's it.
    It doesn't know anything more than following the target A/F table.
    How accurately the target table was set up for the load is the question.

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    Quote Originally Posted by Mark55 View Post
    Let me explain "self learning"
    Self learning is going to correct the main fuel table to follow the target A/F ratio table that YOU set up and that's it.
    It doesn't know anything more than following the target A/F table.
    How accurately the target table was set up for the load is the question.
    Thanks Mark.

    I think my main issue is the fuel volume & trim. I'm 90% sure from all my testing and tuning that I'm running out of injector, and asking the two stockers to do too much. I know from watching my current gauge what target AF ratio makes the boat run the best. So if I can tell it to try to keep to that and it will adjust on the fly to match that I should be good. Right now I'm running 20 year old 2 barrel TBI technology and I think this 460 cu motor needs more than 650 CFM. It would probably run better off with a 4 barrel carb, but I wanna stay EFI for the tunability and possibly better fuel economy (LOL)

    I also want to put real heads on this thing in the future, so I feel like it will need some sort of fuel and air intake upgrade for sure at that point anyway.

    If you know...as far as the ignition system and distributor, are there any special requirements I need or will stock GM Delco stuff work?
    Last edited by Bonzen; 02-01-2017 at 07:32 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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