DrGonzo
05-09-2011, 11:18 PM
Don't know if this is the correct sub forum as there is not a tuning sub-forum on here.
This only applies to those that have their WB 0-5v analog output running into the EGRT input on their ECU.
I have been doing some logging runs and checking the results after every pull. When I do my pulls I try to pay attention to the road and then check the logger when I pull over. Well I noticed that my WBO2 ranges where way off considering the AEM WB only runs 10-20 range. On my pulls I was getting values on MMCD of 9's. So the last couple of pulls I made not of certain points and checked the AEM gauge to see what it said. Well after some investigation MMCD is not displaying the AFR range correctly. If you switch it over to voltage that seems to be right on. I compared the voltage values of that AEM has in their manual. AEM Performance Electronics - All Software & Firmware Downloads (http://www.aemelectronics.com/Images...%2030-4100.pdf) .
0.44 volts = 10.88 AFR not 9.2 like MMCD is showing
Looks like the conversion coded into MMCD is for a WB that goes 8-22 not 10-20 like the AEM WB does. I have searched all through MMCD and I see no way of changing this conversion. So for those of you that are using MMCD to log WB do not use the AFR conversion. Just use the voltage and the chart listed in AEM's manual. It will save you loads of headaches trying to tune.
This only applies to those that have their WB 0-5v analog output running into the EGRT input on their ECU.
I have been doing some logging runs and checking the results after every pull. When I do my pulls I try to pay attention to the road and then check the logger when I pull over. Well I noticed that my WBO2 ranges where way off considering the AEM WB only runs 10-20 range. On my pulls I was getting values on MMCD of 9's. So the last couple of pulls I made not of certain points and checked the AEM gauge to see what it said. Well after some investigation MMCD is not displaying the AFR range correctly. If you switch it over to voltage that seems to be right on. I compared the voltage values of that AEM has in their manual. AEM Performance Electronics - All Software & Firmware Downloads (http://www.aemelectronics.com/Images...%2030-4100.pdf) .
0.44 volts = 10.88 AFR not 9.2 like MMCD is showing
Looks like the conversion coded into MMCD is for a WB that goes 8-22 not 10-20 like the AEM WB does. I have searched all through MMCD and I see no way of changing this conversion. So for those of you that are using MMCD to log WB do not use the AFR conversion. Just use the voltage and the chart listed in AEM's manual. It will save you loads of headaches trying to tune.