jaykay -
cylinder temps are a concern, but only insofar as they induce knock. i will be pulling a knock signal & also checking spark to see if the car starts to pull timing. if that happens, i will richen up a little.
to make the actual fuel corrections, i'm using a piggyback computer that will modify the MAF signal. i'm then checking the actual AFR's with wideband to verify / tweak the result. i will be able to measure rough spark & fuel maps by monitoring the OBD II port and a wideband sensor. i will drive several test points to gather data at 10% TPS intervals from 30 to 100.
when i change AFR, the car will likely change spark as well. i will try to monitor that. over a certain RPM, the spark advance should be fairly constant. we shall see.
BTW, there is a product called MAF Translator that i almost bought. i couldn't verify at the time whether it would work w/ my car. i have since come to the conclusion that it would. it has the capability to run closed loop wideband setup. basically, it hooks up to your wideband & adjusts the MAF signal to achieve the desired AFR's in the map you load to it. pretty cool.
Quote:
Originally Posted by jaykay
Sounds like a very methodical way to accomplish it. Are cylinder temperatures at WOT a concern to you?
How are you going to create an AFR altered map from all your data and then code it, test it, upload it to the ECU? I am talking hardware and software ....coding language etc. Are we simply talking about manipulating the MAF signal as a means of correction?
I ask as it seems difficult to get any custom tune work done and I would like to do this for my 3.2
Sounds great let us know how it works for you
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