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Thread: 2 stroke Fuel injection
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06-02-2011, 10:24 PM #1
2 stroke Fuel injection
Ok guys, I need some help. I am looking to find some aftermarket fuel injection to put onto my omc v8's. I want to build the system , just need to find an ecu system that will work with a 2 stroke. I want to try and make it sequential fire , use 8 msd coils, a single throttle body with a custom plenum up front, plumb in the injectors behind the reeds, one for each cylinder. I know it will all work, just need to find a programable ecu that will fire a 2 stroke.I want to take the factory charging system off and set up an alternator that will run off of the power steering pulley on the flywheel. Any help would be appreciated.
TimDrive It Like You Stole It!!
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06-02-2011, 10:54 PM #2
Several I know use MOTEC, either M48 (will do 4,6,8), M600 for a 6, M800 for an 8 and CDI8 for spark.
Not cheap but fully programable for each individual cylinder for fuel and spark throught the rev range.
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06-03-2011, 12:35 AM #3
http://www.efitechnology.com/
http://www.efitechnology.com/documen...0Rev%201_1.pdf
but hitting a price tag close to 10.000 dollars is probably not something you want to hear
http://www.dtafast.co.uk/S_80_PRO.htm
dta S80 is close to a 1200 euro ?dollars
but you would have to run induction ignition ( optimax coils or bosch coils)
and high impandance injectors or ballast resistors on low impandance injectors
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06-03-2011, 01:48 AM #4
I can't recommend it because I have never tried it but... http://www.megasquirt.info/index.htm
For sure the ultimate DIY FI
96 Cougar 23 MTR twin 300XS's. 100 something
98 Laveycraft Sebring 20.2 Tunnel 280 90 something SOLD
85 Baker RST 220 Laser SOLD
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06-03-2011, 05:59 AM #5
you would have to go to http://www.ms3efi.com/
as MS2 will only do 6 ignition outputs
there is a stable code for the MS3 but i don,t think it will support 8 cylinder two stroke (16 cylinder fourstroke )
at this time
they are developing Alpha codes
http://www.msextra.com/forums/viewto...?f=125&t=38967
which should give support
if your engine is still in one piece i would first install a data gathering system
to have a reference when you start with the system
http://www.aim-sportline.com/pages/b..._bike_evo3.htm
http://www.innovatemotorsports.com/products/dl_32.php
you should be able te get something like this
<iframe width="480" height="390" src="http://www.youtube.com/embed/tebEeoTN0Eg" frameborder="0" allowfullscreen></iframe>
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06-03-2011, 06:26 AM #6
i run wolf efi on my 3 litre and am very happy w/ it, my fuel mileage also went from 2.5 mpg to 3.2 plus, you can pm me for more info, as we also sell them, they have 8 inj drivers as well as 8 ign drivers so you can run it fully sequential on a 2 stroke
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
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06-03-2011, 06:33 AM #7
Contact Dave Bush. http://www.davebushracing.com/index.html
He built a 450 hp 3.3 liter OMC V6 that runs on pump gas using a Vipec ECU. http://www.youtube.com/watch?v=hxl2ldHybHE1972 Checkmate MX-15, Merc inline 1500xs
2010 Tuff 16, 15" Merc 2.5 (150XR6, 200, Drag, S3000 powerheads)
http://www.youtube.com/watch?v=hOh-YewzPc0
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06-04-2011, 05:42 PM #8
BigStuff3
Contact BigStuff3, I did on a project that i'm doing and its won't cost over 5k. I prefer moran billet atomizers injectors.(GM style) I contacted Moran Motorsports on that too, he only need the duty cycle and he can program them to what ever you want and any size(150 lbs an hr to 250 lbs an hr). The intake and throttle body is up to you. Be creative and post pictures as you go along.
Gasoline is for washing parts, Alcohol is for drinking, and Nitromethane is for RACING
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06-05-2011, 08:57 AM #9
Thanks for all the feedback, keep the ideas coming. I think the BS3 is for the race car stuff, I need this to convert a 2 stroke V8 outboard. I am thinking about giving the MS3( megasquirt) . It looks promising and fairly cheap to try.
TimDrive It Like You Stole It!!
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06-06-2011, 03:48 PM #10
NO, NO, Two stroke Snowmobile champion runs BS3 System
I thought the same thing untill I read Mike Morans comment about BS3 and read BS3 website. They are more advanced then you think. Megasqurit started of as race car stuff, now think about that. BS3 has more perimeters then anyone out there, which means more tunability. BS3 does 2 strokes to 4 strokes and single cylinder to V-16's. Just go to there website and read about it and call them for information http://www.bigstuff3.com/ , Trust me, you won't be disappointed . Good luck.
Gasoline is for washing parts, Alcohol is for drinking, and Nitromethane is for RACING
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06-06-2011, 03:56 PM #11
Is MS3 cheaper then $1800 to $4150? The $4150 is for 16 DEFI injectors.
Gasoline is for washing parts, Alcohol is for drinking, and Nitromethane is for RACING
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06-05-2011, 09:03 AM #12
Good luck with the Megasquirt stuff, you will be breaking new ground.
I mentioned MOTEC because it is proven in many outboard apps, I know of 3 different V8 OMC's and many V6's that use it with excellent results. Keep us posted.
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06-05-2011, 09:47 AM #13
good luck w/ the ms stuff, it doesn't have enough drivers for the injector to make it sequential, same w/ the ign, ronnie would be the one to ask about that, i know it can be done though(like anything else if you throw enough time and money at it). i had bought the ms3 which is much smaller and sealed but felt it would've been too difficult to get it to work. the wolf is definetely working well for me, and cheaper then the motec stuff
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
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06-05-2011, 04:09 PM #14
wat you mean is Microsquirt
http://www.microsquirt.com/index.php
the MS3 uses the same proccesor but with more functionality
at the moment they are finisching support for 12 cillinder sequentieel injection and ignition with plans to expand to 16 cillinder
http://www.msextra.com/forums/viewto...?f=125&t=38967
but for now hardware wise MS3 and MS3X hardware board brings support for 8 sequentieel injector drivers and 8 sequntieel ignition drivers just don,t know if they fixed two stroke yet ( ask )
http://www.diyautotune.com/catalog/m...led-p-435.htmlLast edited by PanRonnie; 06-06-2011 at 12:36 AM.
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06-06-2011, 09:22 AM #155000 RPM
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Watch Gary Finch's boat run with Vipec Dave set up and you will see how well it can run. The vipec is cheaper than motec and can run fuel and ignition. It is totally adjustable and sequential.