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Fuel injection trigger options. 2 months 4 weeks ago #31767

  • Kawboy
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MAX9926 chip is being widely used for signal conditioning, I bought one in UK now waiting for delivery. Tuning software allow me to set pull up/down resistor.
Kawboy what 17 LB injectors are they? I'm still opting for original injectors, but to compare and calculate the flow rate ill still need THAT right size injector in the measuring rig (I'm going to go for 3 bar pressure).
I had to go back in to purchase history on EBay and see what I bought. Turns out they were 23 lb injectors so a little overkill but the on time for running at 130 hp would be far less so I'm ok with the choice. 17 lb would be better and would support 170 hp. 

23lb injector from EBay
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Fuel injection trigger options. 2 months 4 weeks ago #31769

  • Daro
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Ok thanks Kawboy. I think when configuring in sequential mode original injectors flow may be not enough, so little more flow is good. I will batch injection for many reasons but to compare fuel efficiency would be willing to make a map with conservative lambda values. But thats future.
For now ignition table, trigger wheel and so on first. I know you wanted to microsqirt you kawa while ago? How far did you go?
I started to work or maybe better to say to thing about ignition table based on parameters in rep manual obviously. Remaining question is what benefit comes from compensating ignition timing with manifold preasure? Any other than enviromental?
Regards

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Fuel injection trigger options. 2 months 4 weeks ago #31770

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Ok thanks Kawboy. I think when configuring in sequential mode original injectors flow may be not enough, so little more flow is good. I will batch injection for many reasons but to compare fuel efficiency would be willing to make a map with conservative lambda values. But thats future.
For now ignition table, trigger wheel and so on first. I know you wanted to microsqirt you kawa while ago? How far did you go?
I started to work or maybe better to say to thing about ignition table based on parameters in rep manual obviously. Remaining question is what benefit comes from compensating ignition timing with manifold preasure? Any other than enviromental?
Regards
 
I know you wanted to Microsquirt you Kawa a while ago? How far did you go? - I have the Microsquirt box and the throttle bodies and that's as far as I have got for now. I have cylinder head work to get through first.
I think I would like to investigate a crank trigger instead of the Timing Case Advancer option just to eliminate the primary chain / water pump timing chain slop to get a true crank position signal. And the Camshaft position signal can be pulled up using a trigger off of one of the cam lobes but not required if you are going with wasted spark on 3 channels.
Manifold pressure/ rpm both affect the timing requirements and I think it's fairly easy to work out in Tuner Studio from what I've seen. There's soooooo much support in the Megasquirt/Microsquirt community and also bear in mind the Speeduino isn't just an engine ECU but used for all kinds of "projects" so if/when you need help, you'll end up with all kinds of advice and not necessarily from people using the product for engine management.

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Fuel injection trigger options. 2 months 3 weeks ago #31778

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Hi Kawboy, i too have throttle bodies, but only two rubber connectors, the airbox side im talking about. Maybe someone here has got one for sale? I'm currently in the process of soursing max9926, some hall and reluctor sensors maybe ill put in different tps? It would be new, especially if I would map idle in tps/rpm table mode. Don't know how to do that but like You said, megasquirt is full of info and people willing to help so ill ask there. If I woul put my speeduino to use than its down to the software to make map which is tuner studio and thats what is being used to tune micro/megasquirt.
Yop, crank trigger is waay better option for true tdc readig or better to say crankshaft angle, but im not sure because I would have to make a hole in the left side engine cover. And doing it inside of the ignition distributor allows me to firstly, reverse everything back to stock, also the wires are not so long going to ecu and stock ignition signal is being created there with reluctor so there is a good chance that it will work. Im having thoughts only about "distributor shaft jitter" I'll callit for now, which as result can cause alot of signal noise. True tdc can be set or reset manually like you do it with normal ignition when servicing, by adjusting sensor mounting plate and setting ignition to locket at zero degrees in ecu. I hope im thinking correctly here. But it will work.
Cam signal... well I don't know if it is worth doing sequential injection, im not even sure what sort of benefit ill get from installing dfi and digitally  enhanced ignition at all? thats why im opting for "easily reversible solutions" well worth a challenge I guess..
I still have to see about manifold preasure stability, maybe a small canister will do to smooth the pulses somewhat, it would be better to read map for ecu at idle if I go for ignition-load/rpm igniton table option at idle.
Sorry, I didn't understand what You mean by:
Speeduino isn't just an engine ECU but used for all kinds of "projects" so if/when you need help, you'll end up with all kinds of advice.
Regards Darek

 

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Fuel injection trigger options. 2 months 3 weeks ago #31779

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Daro wrote -
Sorry, I didn't understand what You mean by:
Speeduino isn't just an engine ECU but used for all kinds of "projects" so if/when you need help, you'll end up with all kinds of advice.

When i first started looking at the possibility of installing an engine management system, I looked at 6-8 different options. A fun project was at the top of the list so it came down to building an ECU then programming which left me with Speeduino and Megasquirt. both I considered to be too physically big to fit a motorcycle and at one point I gave up on the idea. During my investigations, both the Speeduino and Megasquirt had to be built by the owner and the thought of building/ understanding a mother board intrigued me. The final choice boiled down to the software. Megasquirt was 100% Tuner Studio and was as simple as uploading the software and then manipulating the the program on a Windows based screen. Speeduino on the other hand was at that time open source coded and programmers who were into Speeduino were sharing code source on a bulletin board. It looked like a number of "Nerds" hacking their way to an end result that sort of worked but not well.
So that lead me back to Megasquirt. My thought at the time was if I was going to do this, I thought I would go full tilt into sequential injection and coil on plug individual spark programming just to see where I could take this project. But it meant trying to fit a rather large ecu into a tight spot somewhere on the bike. At this point I got frustrated and thought , you know what? just dump the idea and go back to just fixing up this bike and get it running.
I flip flopped for a while and then thought "What about Microsquirt and going batch fired injection and wasted spark ignition". That could be fun, so I went ahead and bought a Microsquirt ecu and a KZ throttle body.
As far as sequential injection or batch fired. Have a read here  Megasquirt Batch fired sequential injection explained  
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Last edit: by Kawboy.

Fuel injection trigger options. 2 months 3 weeks ago #31781

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Hi, thanks. Im still flipfloping in between to doit or not. Im scared to burn the pistons from too lean under load, otherwise cool fun project that is. I have no dyno, so tuning will be hard but apart of that im ready. I still have to figure out 3 bar preasure pump and regulator. Also fuel should be circulating in order to prevent boiling it behind the engine, do You know anything about this fenomenon Kawboy? I have a spare tank to weld some things in it if needed. Ok ill post something more when I have built some stuff in near future. Like I said preasure is next on the list.
Regards Darek

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