E38 maff and co efficients tuning
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E38 maff and co efficients tuning
Hi, when tuning e38/e67 pcm's using 2.24 version of hptuners the maf can be tuned but the prediction coefficient's cant be tuned, my question is if the maf can be tuned and the coeffients cant be, wouldnt the engine be running lean in non steady state depending on mods of course? my understanding is the maf is used for steady state and the coefficients are used for quick throttle transitions?
Or once the maf is tuned the coefficients dont matter?
Or just tuning the maf only a cheap way to do it?
TIA......
Or once the maf is tuned the coefficients dont matter?
Or just tuning the maf only a cheap way to do it?
TIA......
#3
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The 'MAF for steady/SD for transitions' logic is from the old ECU's. Not sure if it's still the case with the newer ones.
If you're going to tune only one air estimator, then you do not want to have the other component active at all, as it will most likely feeding your wrong information. Use what's tuned.
If you're going to tune only one air estimator, then you do not want to have the other component active at all, as it will most likely feeding your wrong information. Use what's tuned.
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Thank you redhardsupra, i guess all the tunes i see that dont have the co efficients disabled must be running lean to some degree, upto 4000rpm when the maf takes over