wickmyster Posted December 14, 2014 Share Posted December 14, 2014 My goal is to run a SVI LPG system on my 250 2v, but I need an ecu for the ecu that came with the LPG kits to get the spark pulses from so it known when to squirt the gas in. So how do I get this sorted? Do I need to get a crank trigger sensor or something, I have already for an electronic dizzy, can I marry the two together? Any ideas/help will be awesome. Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 14, 2014 Author Share Posted December 14, 2014 Anyone? basicly, how can I make a link, motec,megasuirt run on my 250 2v (1972) motor? Quote Link to comment Share on other sites More sharing options...
downtrail Posted December 14, 2014 Share Posted December 14, 2014 What kind of signal does the LPG controller need? There's lots of different options. Would probably work using the coil negative for your rpm input to the controller but can't say for sure as I need more information on the LPG controller Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 14, 2014 Author Share Posted December 14, 2014 Heres a pic of the controller http://postimg.cc/image/6wqpbxxsh/ Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted December 14, 2014 Share Posted December 14, 2014 All the lpg kits I've installed have a wire you either hook up to negative side of the coil or you wrap it around the ignition lead. I think you might be over complicating the issue Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 14, 2014 Author Share Posted December 14, 2014 Ohh that would be a bonus, I was contemplating doing efi as well...to dual fuel it, though I may just have it suck air through the carb I mice big throtle body would be pretty nice, get a bit more of a roar out of it. Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 16, 2014 Author Share Posted December 16, 2014 thegreatestben, do you run an O2 sensor etc to get the LPG kit to run? Quote Link to comment Share on other sites More sharing options...
thegreatestben Posted December 16, 2014 Share Posted December 16, 2014 Lol no forklifts aren't that high tech. It shouldn't be that hard. Should be instructions from the manufacturer of that kit? What method of delivery does your set up have? a single line going to a mixer? Is your original motor injected? If so I've only got experience with Carby setups with basic electronics and vacuum operated reg's. Quote Link to comment Share on other sites More sharing options...
Valiant Posted December 17, 2014 Share Posted December 17, 2014 I think the wire on the coil neg and/or wrapped around the coil lead are signal for the fuel lock off valve on the liquid line to the convertor. That's how mine works. Wickmyster would you consider a LPG carb on your 250? It might save you some trouble. Quote Link to comment Share on other sites More sharing options...
downtrail Posted December 17, 2014 Share Posted December 17, 2014 I just did some reading on the svi system seems it's a sequential system so it requires a LPG nozzle or injector or what ever they use per cylinder. It also requires a wide band O2 sensor for the controller as this will map the controller in such a way that's both economical and safe to run. That's about as far into it as I read. So from being a sequential system I'd think it would also need to know rpm and also cam position to work properly. And possibly map or tps readings? Don't quote me but when I read sequential that's what springs to mind from doing sequential fuel injection systems. Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 26, 2014 Author Share Posted December 26, 2014 I already have a full SVI system from a dual fuel BA. I want to use it in my Coupe just to be different, but it will have better power and economy that and carb LPG set up like my E-gad BA has:/ I might have to hunt for some instaltion instuctions for my kit. But can anyone answer my intial question? Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 26, 2014 Author Share Posted December 26, 2014 I want to know what controls the timing on this thing http://members.iinet.net.au/~mikejh/XP.html and thid thing http://members.iinet.net.au/~mikejh/502XC.html Quote Link to comment Share on other sites More sharing options...
downtrail Posted December 26, 2014 Share Posted December 26, 2014 Find the manual for what you have then ill be abke to tell you. Ad for your original question I answered it above. Depending on if it needs to be sequential or not will be the deciding factor as there are only limited choices to run sequential fuel for an 8 cylinder motor out there megasquirt 3 can do sequential fuel but spark will be still wasted spark. Link g4 extreme can do sequential fuel and coil per cylinder. To run sequential the ecu needs to know rpm via the crank then a sync pulse from the cam so it can figure out what cycle its on. Really need more info as theres no one answer to your question. 1 Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 27, 2014 Author Share Posted December 27, 2014 OK. I am only running my 250 2v 6. How to I put a cam position sensor on my old motor? and what's is the best way to get RPM signal from the crank? Quote Link to comment Share on other sites More sharing options...
downtrail Posted December 27, 2014 Share Posted December 27, 2014 This depends on the ecu you intend to use and how it wants to have the signal delivered normally the easiest was is to machine up a trigger wheel to fit to crank or to machine slots into the bottom pulley if there is enough meat. 36 teeth with one missing is common then for cam speed one tooth off set so it doesn't clash with the missing tooth. You can use hall effect or vr sensors but the tooth profile must match what sensor you intended to use. Then you will need to add a coolent temp sender and inlet air temp sender a throttle position sensor. Etc if you intend to use the ecu to control fueling and timing. The ecus I mentioned above will still only support sequential tge same way for a 6 as the ms3 only has 4 ign channels the g4 extreme will support sequential and coil per cylinder. But before jumping into all of this you really need a better understanding of how this lpg system works you may be wasting your time if you cannot give it the info it needs 2 Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 27, 2014 Author Share Posted December 27, 2014 Ok, think it it time to get a spare motor and start playing Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 28, 2014 Author Share Posted December 28, 2014 I am thinking of trying the cam angle sensor from an AU on my non crossflow, as they seem to be able to dropinto my dizzy hole without much modding. Quote Link to comment Share on other sites More sharing options...
downtrail Posted December 28, 2014 Share Posted December 28, 2014 Sounds like your on the right track. No idea how those particular cam sensors work you may need a custom trigger wheel to suit the ecu you end up using bit its a step in tge right direction aslong as it has 2 triggers you should be fine Quote Link to comment Share on other sites More sharing options...
wickmyster Posted December 31, 2014 Author Share Posted December 31, 2014 What is the best set up for a crank trigger? Also, is there any benefit from running a wasted spark set up?/How much harder will it be to get it running a normal firing set up, I dont mind running 6 coils as I was planning on coil-on-plug set up if I can. Quote Link to comment Share on other sites More sharing options...
downtrail Posted December 31, 2014 Share Posted December 31, 2014 Best trigger set up is what you have to play with or what you can make work. No benifit from wasted spark if any thing itll shorten the coil life due to being fired 2x a cycle as aposed to once. Its not hard just having an ecu with enough ign outputd to support 6 coils is all it needs 1 Quote Link to comment Share on other sites More sharing options...
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