NefMoto > Technical > Tuning > ME7.5 adjust ignition per gear is it possible?
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Author Topic: ME7.5 adjust ignition per gear is it possible?  (Read 13800 times)
prj
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« Reply #15 on: October 30, 2012, 12:50:30 PM »
Then you are running too rich in low gears and too lean in top gears.

These 5V engines tend to make peak power at around 0.8-0.82 lambda, you are running richer than that through the range it seems.
Richer lambda is needed in most cases only for EGT control.

Do you have any EGT control?
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professor
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« Reply #16 on: October 30, 2012, 01:35:10 PM »
Yes i set fueling based on MKRL after 140% load, lamfa is set to 0.82 until 600oC  where BTS with 0.79 target used for high loads/rpms too.
After 850oC FBSTABGM is taking control, without needed more than one/twice so far.
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prj
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« Reply #17 on: October 30, 2012, 01:36:53 PM »
600C does not really need that much enrichment, I'd trigger it higher.
Do you have an actual EGT sensor on the car?

Or when you are talking about 800-850C it is simulated EGT's?
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professor
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« Reply #18 on: October 30, 2012, 03:06:35 PM »
Yes talking simulated egts for FBSTABGM.
Egt gauge/probe beeps after 800oC so foot is lifted of the pedal and has happend one/two times.
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prj
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« Reply #19 on: October 30, 2012, 03:51:20 PM »
Simulated EGT is usually very wrong, especially if underscaling load and running lots of boost.
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professor
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« Reply #20 on: October 31, 2012, 12:37:03 AM »
Correct thats why an ext egt gauge/probe is necessary.
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prj
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« Reply #21 on: October 31, 2012, 01:39:33 AM »
Regardless, if your load does not peg, then your ignition angle depends on IAT and EGT.
Gear has little to do with it. So use those functions to tune.

Use LAMBTS to enrich more on higher ignition retard and all will be well.
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ibizacupra
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« Reply #22 on: October 31, 2012, 03:38:49 AM »
Quote from: prj on October 30, 2012, 03:51:20 PM
Simulated EGT is usually very wrong, especially if underscaling load and running lots of boost.

Is the egt simulated or does it use lambda heater temps?
between 1.8t files I have looked at the trigger threshold for going into bts seems to vary on similar turbo'd engines, but which have different b1s1 lambda locations... Those which have lambda's further down the downpipe seem to have lower trigger temps..  Seemed to suggest to me the lambda temps were relevant on no egt sensor equipped cars

what do you think?
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phila_dot
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« Reply #23 on: October 31, 2012, 05:23:30 AM »
Quote from: ibizacupra on October 31, 2012, 03:38:49 AM
Is the egt simulated or does it use lambda heater temps?
between 1.8t files I have looked at the trigger threshold for going into bts seems to vary on similar turbo'd engines, but which have different b1s1 lambda locations... Those which have lambda's further down the downpipe seem to have lower trigger temps..  Seemed to suggest to me the lambda temps were relevant on no egt sensor equipped cars

what do you think?

No, this is completely modeled.
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ibizacupra
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« Reply #24 on: October 31, 2012, 10:08:11 AM »
Quote from: phila_dot on October 31, 2012, 05:23:30 AM
No, this is completely modeled.

hmmm ok.
weird coincidence when I have logged it and see it swap to bts tho..
accurate model (as std)
thankyou
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