Running with flatspot around 2500rpm
#1
imitek
Thread Starter
Running with flatspot around 2500rpm
Light load
Full throttle is fine just when crusing at light loads
Could it be to much overlap ?
Ive tried chaning timing and fueling but no luck any ideas
Idle is sweet
Idleing at 1200rpm
At around 900 it starts to pop and cutout so left it at 1200rpm
Full throttle is fine just when crusing at light loads
Could it be to much overlap ?
Ive tried chaning timing and fueling but no luck any ideas
Idle is sweet
Idleing at 1200rpm
At around 900 it starts to pop and cutout so left it at 1200rpm
#2
Rotary Enthusiast
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depends on AFR.
typically some AFR changes or bucking can occur at changeover if the MS is too high. typical crossover points are around 30-40% duty cycle, if this is where you problem is (doubt it, since you said light load) it would happen at 30-40% injector duty cycle.
what ecu do you have?
typically some AFR changes or bucking can occur at changeover if the MS is too high. typical crossover points are around 30-40% duty cycle, if this is where you problem is (doubt it, since you said light load) it would happen at 30-40% injector duty cycle.
what ecu do you have?
#3
imitek
Thread Starter
Motec m2r im on it again tonight ive played with the injection timing fuel where the flat spot is its like a specific load its there il make a vid of it and upload it
#7
Full Member
iTrader: (19)
I had a similar problem with my Microwreck Lt16. The AFRs where constant but I had a slight hesitation at 2400. It turned out to be the injection timing table. It went from 150 degrees to 180 degrees right at 2500. You could actually feel it as a slight hesitation no matter the load. The higher the load the more I felt it. I ended up transitioning the values at a higher rpm and much better.
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#8
imitek
Thread Starter
ill put my mapp up as may be easyer to see i will get a log in few days this is the only way i could upload file also i thort that was rich for idle low ?
https://www.dropbox.com/s/o9uukderlc...0.bmp.T62?dl=0
thats my most recent few more vids Watch "Part 2" on YouTube
https://www.youtube.com/watch?v=-DBR7ufhGkU&feature=youtube_gdata_player
Watch "Ignittion table" on YouTube
https://www.youtube.com/watch?v=fUJbJWVO6Kk&feature=youtube_gdata_player
Watch "Cold start low load" on YouTube
https://www.youtube.com/watch?v=g5iruOwqtWs&feature=youtube_gdata_player
https://www.dropbox.com/s/o9uukderlc...0.bmp.T62?dl=0
thats my most recent few more vids Watch "Part 2" on YouTube
https://www.youtube.com/watch?v=-DBR7ufhGkU&feature=youtube_gdata_player
Watch "Ignittion table" on YouTube
https://www.youtube.com/watch?v=fUJbJWVO6Kk&feature=youtube_gdata_player
Watch "Cold start low load" on YouTube
https://www.youtube.com/watch?v=g5iruOwqtWs&feature=youtube_gdata_player
#9
imitek
Thread Starter
I had a similar problem with my Microwreck Lt16. The AFRs where constant but I had a slight hesitation at 2400. It turned out to be the injection timing table. It went from 150 degrees to 180 degrees right at 2500. You could actually feel it as a slight hesitation no matter the load. The higher the load the more I felt it. I ended up transitioning the values at a higher rpm and much better.
#10
imitek
Thread Starter
log files i got 2
one is engine warm and just flat spot
and the other is log of me changing timing and smoothening it or trying to lol its geting better but that flat spot is still there ive tried going crazy advancing timing jnust to test if it makes any better but not
but any way the files
the short file warmed engine
https://www.dropbox.com/s/hy5r5fh20a...M_RUN.LOG?dl=0
starting from cold and adjusting fueling and timing
https://www.dropbox.com/s/dm1ghg7oyg...NGINE.LOG?dl=0
one is engine warm and just flat spot
and the other is log of me changing timing and smoothening it or trying to lol its geting better but that flat spot is still there ive tried going crazy advancing timing jnust to test if it makes any better but not
but any way the files
the short file warmed engine
https://www.dropbox.com/s/hy5r5fh20a...M_RUN.LOG?dl=0
starting from cold and adjusting fueling and timing
https://www.dropbox.com/s/dm1ghg7oyg...NGINE.LOG?dl=0
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