Quote from: AJP turbo on May 22, 2016, 11:45:30 AM
Scott have you considered running less meth? Like nozzle or duty cycle? I'm not sure how your controller works.....You are really rich which isn't the worst thing but you have room....Your stft's are bottomed out still and the ECU is not able to pull enough fuel to hit desired lambda.....It wants .80 lambda and you are in the .70's.
Might be getting fuel dilution and just wasting Meth and greasy plugs maybe I dunno.
I'm looking at a similar spot in your new log to make an apples to apples comparo. At 5k in 3rd gear you are at about 1.90 load again and now at 14 degrees instead of 12. So yeah you should feel a bit more power...Remember spark follows load. The look up tables in the tune are load and spark. Boost can be different at particular loads based on conditions.
I don't know if TOrrie added spark or your conditions and temps called for that spark increase....IAT2 is the manifold temp that spark compensations are based on....Could've been cooler and I don't mean ambient temps only IAT2 will tell you.
And typically you don't add wastegate duty cycle to change boost. You command more or less torque from the engine and the wastegate dynamics adjust to deliver the airflow to hit the desired TIP value set by the ECU.. Or the less than ideal way is to just use a multiplier to the desired TIP value.
Good stuff, thank you for looking. I am just following Torries lead right now, seeing that the OP switched to a smaller nozzle I am sure if Torrie sees a significant difference he will advise. Another idea I had was to use that rich condition to start introducing an E mix to the car. A few gallons of E should give the car the ability to get closer to .80 lamda, how much closer and how much E i have no idea. I really only want to go that route if there is a significant gain, something that can be seen on a time slip or felt in the seat of you pants. It would be great to be able to run the same tune either way, just being a bit rich without the E, then add it for "special occasions"
Whats your thoughts on the effect an E mix would have on this tune?
So it looks like he commanded the same boost, and after looking again I got about the same boost levels. Spark was what differed. The runs were a day apart and condition's where actually better on the previous revision "Saturday", as far as the DA goes anyways. Based on the increased performance and the fact that he did not change the commanded boost I am making an educated guess that he added spark. Though likely meaningless to someone who can tune like you and Torrie, I keep track of every run, 60-90 60-100, the DA and anything that would change those times like a full tank of gas as opposed to a quarter, as well as any significant wind. That last log was significantly faster than my best and it had +1000 DA over the fastest log.
I'm trying to understand more about what parameters are/can be adjusted. Sounds like commanded boost, load can be commanded? and spark tables can be adjusted? Are load and torque the same? Reason I ask is because I had this great idea to adjust commanded boost differently in different gears, Torrie agreed and said to let him know when I figured out how to do it LOL. I guess our access to the PCM is not the same across all cars, the Mazda had the ability to adjust commanded boost based on gear.
