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MAPcalc based only load, load fluctuations

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Old Sep 25, 2020 | 10:38 AM
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MAPcalc based only load, load fluctuations

Car is on tephra V3 (53050312), MAF scaling to 65536 everywhere because the inlet pipe is very big, and the MAF at low rpm is very unstable, So it is a MAP based Load car now.
Screenshot of actual MAPcalc and Load logged in evoscan. Have someone seen something like this before? The load drop between 4500 and 4800rpm, Haven't tried at high rpm yet.




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Old Sep 26, 2020 | 02:34 AM
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6000rpm run
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Old Oct 6, 2021 | 10:14 AM
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One year later and another turbo setup, same problem, never solved. This is a WOT pull, my mapcalc tables past 110Kpa are exactly the same , MAF tables to 65536 everywhere.
I dont understand! The pronlem is very visible also in part throttle runs



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Old Oct 6, 2021 | 10:39 AM
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Probably your IMAP calcs. I bet if you log IMAP you will see spikes there that bring down the load.

If so, the fix is easy: https://www.evolutionm.net/forums/09...-solution.html
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Old Oct 7, 2021 | 02:14 AM
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Originally Posted by razorlab
Probably your IMAP calcs. I bet if you log IMAP you will see spikes there that bring down the load.

If so, the fix is easy: https://www.evolutionm.net/forums/09...-solution.html
Thanks a lot mate, it seems that I need "Load multiplier end when TPS decreased by % (hysteresis)" for 53050012

EDIT :
FOUND manually comparing roms, and it solved all my problems, Thanks a lot

<table name="Load multiplier when TPS increased by %" category="Load" address="546d4" type="1D" scaling="Throttle %"/>

<table name="Load multiplier end when TPS decreased by % (hysteresis)" category="Load" address="546d0" type="1D" scaling="Throttle %"/>

Last edited by eTiLiKo; Oct 7, 2021 at 03:13 AM.
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Old Oct 7, 2021 | 06:57 AM
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Originally Posted by eTiLiKo
Thanks a lot mate, it seems that I need "Load multiplier end when TPS decreased by % (hysteresis)" for 53050012

EDIT :
FOUND manually comparing roms, and it solved all my problems, Thanks a lot

<table name="Load multiplier when TPS increased by %" category="Load" address="546d4" type="1D" scaling="Throttle %"/>

<table name="Load multiplier end when TPS decreased by % (hysteresis)" category="Load" address="546d0" type="1D" scaling="Throttle %"/>
Great, glad that worked! I always set those first in all my tunes.
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