Fuel Injection
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Fuel Injection

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    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    Default Fuel Injection

    Does anyone here run fuel injection? My carb is set up for sea level and running fat. I need to adjust the jets but it got me thinking about going up to the mountains where the lakes are 6-8000 feet. Fuel injection would solve this problem and if it is anything like my suburban it would give me more power and better economy.

    Matt.

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    Senior Member ap67et10's Avatar
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    Quote Originally Posted by Motomatt68 View Post
    Does anyone here run fuel injection? My carb is set up for sea level and running fat. I need to adjust the jets but it got me thinking about going up to the mountains where the lakes are 6-8000 feet. Fuel injection would solve this problem and if it is anything like my suburban it would give me more power and better economy.

    Matt.
    there are only a handful of people here that run fuel injected engines in their jets and v-drives (pretty common in the newer outdrive stuff though).

    i'm one that runs fuel injection in my jet boat, i have no plans to ever run a carb again. the cost to go fuel injection in very low compared to what it used to be, and the programs now are almost foolproof. just a slight bit of general knowledge and some electrical skills will get you what you want....a perfect running setup...at 500 or 5000ft. best fuel milage, and reliability you could ever imagine, better hot or cold starts, midrange power and throttle response at any time.

    there are many that will say there carb runs great...however the ones that have actual owned/built an efi setup for a boat don't go back to carbs. just people with carbs that have never run efi saying their carb is just as good.

    AP

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    Senior Member ap67et10's Avatar
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    btw, hows the boat coming? if you are serious about doing a efi swap, i could probably help you get it don't at a resonable cost....all depends on what you final goals are. you still running the 455?

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    Member Pig Pen's Avatar
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    Quote Originally Posted by ap67et10 View Post
    there are only a handful of people here that run fuel injected engines in their jets and v-drives (pretty common in the newer outdrive stuff though).

    i'm one that runs fuel injection in my jet boat, i have no plans to ever run a carb again. the cost to go fuel injection in very low compared to what it used to be, and the programs now are almost foolproof. just a slight bit of general knowledge and some electrical skills will get you what you want....a perfect running setup...at 500 or 5000ft. best fuel milage, and reliability you could ever imagine, better hot or cold starts, midrange power and throttle response at any time.

    there are many that will say there carb runs great...however the ones that have actual owned/built an efi setup for a boat don't go back to carbs. just people with carbs that have never run efi saying their carb is just as good.

    AP
    I run EFI and I'll never go back

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    Senior Member MACHINEHEAD1's Avatar
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    Do the calcs. , pop the bowl of and re-jet. Maybe 25 bucks if you rip the gaskets. On the other hand purchase a dumbed down EFI with fixed calcs with no O2 or maybe with O2. Get your headers jacketed so the O2 works or not run water at all. All you will have is a marginal EFI set up that is very user friendly and has all the benifets metioned above. Return fuel sys. or variable voltage pump installed yadda yadda yadda. And dont think about changing the combo once the program is finalized. It will be even more comprimised than it already is. Dont do it. MERC and all the other OEMs have it configured for that combo. Change something and se what happens on even their EFI. Find a really good carb guy and save $1900-3200 + your time, labor, phone calls, finding a good EFI tunner, Going to the lake AGAIN, getting back with the tunner with your data logged results, hope you have a laptop, maybe getting a final tune this time and trying it again. Then to find there is a little power left on the table. And the process starts Again. If your mota aint stock, or plans not to be, dont do it! And dont even get me started on aftermarket EFI for boats. Been all up and down all these roads. CARBS RULE

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    Senior Member s2k1's Avatar
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    Quote Originally Posted by MACHINEHEAD1 View Post
    Do the calcs. , pop the bowl of and re-jet. Maybe 25 bucks if you rip the gaskets. On the other hand purchase a dumbed down EFI with fixed calcs with no O2 or maybe with O2. Get your headers jacketed so the O2 works or not run water at all. All you will have is a marginal EFI set up that is very user friendly and has all the benifets metioned above. Return fuel sys. or variable voltage pump installed yadda yadda yadda. And dont think about changing the combo once the program is finalized. It will be even more comprimised than it already is. Dont do it. MERC and all the other OEMs have it configured for that combo. Change something and se what happens on even their EFI. Find a really good carb guy and save $1900-3200 + your time, labor, phone calls, finding a good EFI tunner, Going to the lake AGAIN, getting back with the tunner with your data logged results, hope you have a laptop, maybe getting a final tune this time and trying it again. Then to find there is a little power left on the table. And the process starts Again. If your mota aint stock, or plans not to be, dont do it! And dont even get me started on aftermarket EFI for boats. Been all up and down all these roads. CARBS RULE
    LOL, sounds like you've dealt with the wrong systems and/or the wrong tuners.
    For the original poster, I am an EFI fan. My boat has a carb now but I am gathering parts to convert it to EFI.
    Chris @ Benchmark Performance

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    New here Beer:30's Avatar
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    Quote Originally Posted by MACHINEHEAD1 View Post
    CARBS RULE
    For YOU, probably. If you don't have the mental capacity for EFI, then you should definitely stick with metered fuel leaks.

    EFI is SO EASY today that is it a no brainer.

    ASIDE from the obvious efficiency:

    *NO engine compartment fuel fumes. You don't even really NEED an air blower anymore. I haven't had mine on once.

    *NO dried out gaskets to leak at the beginning of every season. Just keep the fuel good and don't let the boat sit over a year. Run some injector cleaner once a year or so.

    *NO pumping the throttle and hoping you got enough fuel into it to keep it from a lean-kickback. Just start it. Regardless of weather, altitude, etc. Just turn the key!

    *NO fuel boiling out of the bowls and into the cylinders for each hot-start. Nice, dry starts. Cylinders aren't washed down. Starter lasts longer.

    Could go on and on. I think you get the picture. The money you spend on EFI easily covers the next few carb rebuilds, wasted fuel from boiling, pumping, leaks, etc, AND the fuel you save by having a much more precise mixture during ALL conditions.

    This_thread has some good dual-throttle-body EFI info
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Member Get'erWet's Avatar
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    Me Too...I'm an EFI Fan, just wish I knew what it took to convert this 79' Stock 454 with a Edelbrock 750CFM in my Rochelle Craft.

    Can someone cough up the ingrediants...? And ball park figure $$$

    Thanks in advance


    Diamond Dave

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    New here Beer:30's Avatar
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    Quote Originally Posted by Get'erWet View Post
    Me Too...I'm an EFI Fan, just wish I knew what it took to convert this 79' Stock 454 with a Edelbrock 750CFM in my Rochelle Craft.

    Can someone cough up the ingrediants...? And ball park figure $$$

    Thanks in advance


    Diamond Dave
    F.A.S.T. EZ-EFI, like in the thread that I posted the link to in my last post. Well, Here_it_is_again, in case you didn't see it. Just the single-1000cfm throttle body EZ EFI would be fine for your case. About $2400 would get you the whole setup including fuel pump and black-braided lines. Although, you would HAVE to plumb an O2 sensor into the exhaust, somewhere dry.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Member Pig Pen's Avatar
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    Quote Originally Posted by Get'erWet View Post
    Me Too...I'm an EFI Fan, just wish I knew what it took to convert this 79' Stock 454 with a Edelbrock 750CFM in my Rochelle Craft.

    Can someone cough up the ingrediants...? And ball park figure $$$

    Thanks in advance


    Diamond Dave
    EFI connection offers a conversion to run SBCs, LT1s and later BBCs with LS1 PCM. It converts them to coil per cylinder ignition so you can ditch the distributor too.

    http://www.eficonnection.com/eficonnection/default.aspx

    I know this probably doesn't help you but I'm just throwing it out there.
    Last edited by Pig Pen; 06-15-2010 at 08:34 PM.

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    TJS
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    Blown 8-71 EFI here. Using Accel Thruster. Works nice. Made my own stuff except the bugcatcher. Starts and idles rock solid. See the build in my sig.
    T.J.

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    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    Quote Originally Posted by ap67et10 View Post
    btw, hows the boat coming? if you are serious about doing a efi swap, i could probably help you get it don't at a resonable cost....all depends on what you final goals are. you still running the 455?
    Andrew,

    Everything has changed since I last talked with you. I got frustrated one day while working on my boat and my wife said she wanted me to buy something that worked. She didn't have to tell me twice so I bought this:
    Click image for larger version. 

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    It is not exactly what is usually here on this forum but since this is the best forum I have found for anything I am staying.

    I sold both my other boats. The project and the '69 with the 455. I sold your pump to the guy who bought the '69 and have been helping him put it together.

    The boat I got is a 2002 aluminum hull with a jacuzzi jet. The jacuzzi has an AT energizer kit and seems to be doing fine. The guy I bought it from told me it had a 454 (his brother told him thats what it was) turns out it has a 502HO with 20 hours on it.

    I am not getting the performance I would expect from it so I am working on it. It jumps up on plane quickly but tops out at 4000 and about 38mph. Other guys I have talked with who have the same size and weight boat do better with a 350 so something isn't right. That is why I started this thread. I have wanted EFI for a while and I think it would be the best way to go.

    I have been reading about the FAST EZ-EFI beer:30 talked about and it seems good. Since I am not sure what cam I have I need something that is very forgiving.

    If you have some ideas I would love to hear them.

    Thanks, Matt.

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    Senior Member ap67et10's Avatar
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    Quote Originally Posted by Get'erWet View Post
    Me Too...I'm an EFI Fan, just wish I knew what it took to convert this 79' Stock 454 with a Edelbrock 750CFM in my Rochelle Craft.

    Can someone cough up the ingrediants...? And ball park figure $$$

    Thanks in advance


    Diamond Dave

    I know there are going to be people that give me crap for suggesting this, but if you are really on a budget, and you have a stock setup right now (matt this is for you too) then this is how you do it.

    get your feet wet with efi and tuning, by putting this efi setup on your stock engine. you can get great experience, and probably won't hurt anything if you screw up. it will get your boat setup for efi, and later upgrades will be very easy.

    ....now you ready....do this:

    http://www.diyautotune.com/tech_arti...part1-nova.htm



    then go ignition controlled:

    http://www.diyautotune.com/tech_arti...part2-nova.htm



    then when ready pick up a MPI manifold and injectors and the upgrade is super easy cause everything is already there:

    http://www.diyautotune.com/tech_arti...part3-nova.htm




    this guy is a MegaSquirt efi distributor. you can buy the fully assembled ecm's or you can assemble them yourself. in my case i'm running coil on plug ignition (which requires specific hardware and software mods which i did when i built the ecm myself), but many different types of ignition setups can be run. there are many things that can be done with MegaSquirt and its about as cost effective as it gets. with the stock BBC you guys are running the TPI throttle body setup from a stock GM bbc would work great. half of the performance issues GM had were mainly related to the tune up they had to run because of emissions. these won't get quite as good of fuel milage as a mpi, but are a good, cheap jump into efi, with easy easy upgrade to mpi and engine mods later. Not to mention they are far far better than a carb setup, you can learn to tune your own deal, and really get some hands on knowledge and at cheap price, with all the great benefits of efi. i'm thinking of doing this exact thing to my dads boat, but with COP ignition.

    Andrew

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    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    I guess it doesn't matter now. I took my boat out and have a knock in the engine now. I had a mechanic look at it and it sounds like a rod bearing. I do have a Volvo 260A that I am going to put in but of course this changes everything.

    I will probably be able to pay for all of this with the money I will save on gas but I will have to see how fast it is. The 260A is by no means a monster but it should get me on plane.

    If anyone is interested in a 502 PM me. I will probably redo it myself this winter.

    Matt.

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