Tune is close to done but i have some anomalies, help!
Posted: Fri May 07, 2021 6:40 pm
Hi
the tune on my 355 VP is getting close to done but i'm getting some weird stuff that i cant seem to work out why they're happening, nor can i work out how to tune them out.
Last log file is below.
At 1:50 i have some spark jumping around from 28.8 to 23.6 degrees, but when in the tracing bubble, it show its between the 27 and 29 degree cells only. what other part of the tune could be pulling it out?
23:50, when I quickly snap open the throttle, it just goes lean and it knocks and takes out a huge amount of timing. What settings in the AE would i need to stop this from happening, already bumped this up from factory by maybe 20%, do i just keep ramping this up?
You can see a similar thing at 24:50 when i hit the throttle and feather it, on the feather it goes lean a bit and knocks. and 26:01
Can someone explain what the value in the VE table is doing here:
At 27:40, when i cruise along at zero throttle, its at 41VE, 1200rpm and the value in the table is around 43, AFR is a steady 13.9-14.0.
Then when i gently grab the throttle again, it moves to 48VE, 1400rpm and the value is 50, but the AFR is 16.8:1
So why at only 5% throttle and barely a rise in the VE and RPM, with a higher VE value does it go so much leaner?
Log: Tune: XDF: OSE12P V112 - 1,2 AND 3 BAR
the tune on my 355 VP is getting close to done but i'm getting some weird stuff that i cant seem to work out why they're happening, nor can i work out how to tune them out.
Last log file is below.
At 1:50 i have some spark jumping around from 28.8 to 23.6 degrees, but when in the tracing bubble, it show its between the 27 and 29 degree cells only. what other part of the tune could be pulling it out?
23:50, when I quickly snap open the throttle, it just goes lean and it knocks and takes out a huge amount of timing. What settings in the AE would i need to stop this from happening, already bumped this up from factory by maybe 20%, do i just keep ramping this up?
You can see a similar thing at 24:50 when i hit the throttle and feather it, on the feather it goes lean a bit and knocks. and 26:01
Can someone explain what the value in the VE table is doing here:
At 27:40, when i cruise along at zero throttle, its at 41VE, 1200rpm and the value in the table is around 43, AFR is a steady 13.9-14.0.
Then when i gently grab the throttle again, it moves to 48VE, 1400rpm and the value is 50, but the AFR is 16.8:1
So why at only 5% throttle and barely a rise in the VE and RPM, with a higher VE value does it go so much leaner?
Log: Tune: XDF: OSE12P V112 - 1,2 AND 3 BAR