BBursell wrote: ↑Tue Aug 18, 2020 10:28 am
This is all very interesting!
Planning to convert a old 2s tripple (SAAB) from points/distributor to trigger wheel and a speeduino for ignition (distributor drive is a weak point in these engines). Fuel injection is a future plan if the first part succeeds, this engine does not rev as high (maybe 7000rmp max) so I don't think I'll be needing the psuedo map sensor. Transfer ports are inaccessible so it has to be throttle body or inlet port injection.
But anyway,
Good work, indeed!
.
Hi BBursell. Your SAAB project sounds interesting. From my experience and what I have seen done with an old fuel injected Kawasaki 350 BigHorn you wont need staged injection with the SAAB. Anything less than 9,000 RPM can get away with one size injector as you don't run into serious injection time constraints.
Follow the link:-
https://www.kiwibiker.co.nz/forums/show ... gine-tuner
Then
copy and paste this "Kawasak EFI site:" search term in front of theKiwiBiker URL address and you will find a whole lot of links to the Kawasaki converted to EFI.
Kawasak EFI site:
Injecting into the transfer ports or across the crank case has the advantage of being able to inject for a full 350 crank degrees. Injecting into the inlet port limits you time wise. The longer (crank degrees) you can inject for, the smoother the motor will run. I have found that fuel injection on a two stroke works best when the motor is running hot enough, say 60 - 80 deg C to evaporate the fuel nicely. Racing two strokes are currently run about 40C for best power and that makes for poor fuel evaporation and difficult tuning.
Kawasaki Dyno Run:-
https://youtu.be/ifSEql1X4R0
VMX Ride :-
https://youtu.be/v8i6ps0PdVI
Bush run:-
https://youtu.be/eleqBGvOM4M
.