I have a new to me 2010 CTS V A6. It came with some bolt-ons, pulley, about 1000cc injectors and tune. I had to tweak the maf a little, but now its within 3% or less. Throwing a flex fuel sensor on it to run some ethanol. Doing some research about Flex Fuel tuning and see that most stock FF vehicles tables actually show areas that have negative timing, which kinda throws me off. Turns out Ethanol likes less timing in some places. Can I not just use the Flex Fuel adder table to add timing?
I just wanted to check with the pro's before fillng the tank. Here's my check list. Copied some settings from my Camaro's Flex tune, should I ditch steps 2-5?
1. Sensor is enabled, set to sensor
2. Max E set to 85%
3. Comp Change Threshold 1.0
4. Delay Volume 0.01
5. Transitional Volume 0.01
6. Multi vs comp 0 0.20 0.65 0.85 100
7. Populate Flex Fuel adder table starting at .5 degree all the way up to 4 degrees (to start)
I have no KR now, so my plan was to start with this and see where it takes me. My spark adder tables usually net me around 18 degrees on 93, seeing about 12.5 boost. If the E% is good, all in I should only see 22 degrees of timing at WOT. Does this sound reasonable?