RevGTO
August 10th, 2009, 03:51 PM
I've been running OLMAF for several months now with my LM1 in the car and adjusting the OL AFR and MAF tables. I've gotten it within an acceptable range, but I do notice that the AFR varies due to weather conditions. I pulled this quote from a thread on LS1tech:
Open loop tuning is NOT easy, it is more difficult because you don't have that automatic correction (LTFT's) so after dialing in the VE and/or MAF there's OL vs ECT to get right so A/F stays somewhat consistent, and of course there's IAT filters, charge temp bias, etc. to get straight so your A/F doesn't end up creeping from IAT heatsoak. No, open loop tuning is not easy.
Can anyone comment on the parameters for tuning the various tables he mentions in order to get AFR more consistent?
Open loop tuning is NOT easy, it is more difficult because you don't have that automatic correction (LTFT's) so after dialing in the VE and/or MAF there's OL vs ECT to get right so A/F stays somewhat consistent, and of course there's IAT filters, charge temp bias, etc. to get straight so your A/F doesn't end up creeping from IAT heatsoak. No, open loop tuning is not easy.
Can anyone comment on the parameters for tuning the various tables he mentions in order to get AFR more consistent?