What have you done in your tune so far? What are you trying to figure out?
I've made adjustments here and there
In quite a few places.
For example
I don't fully understand the how target filling and optimum torque maps are configured. They are inverse but don't always match. I've read about what they mean but I've seen similar tunes with different numbers. Mainly on the top end.
There's a map for Max VE, how do you know what that is? I've bumped it because i believe the Ecu calculates this and if you go over starts yanking timing.
The minimum timing Map? does nothing in my experience.
How do you know when the Ecu Is using low vs High octane timing map? I tune with the high map.
Does It use optimal timing map? Ive just copied my high maps over.
My main issue right now is cold starts. The car likes to stall one time about 10 in before it will idle. There is a cold start map but it isn't used until the car guess into closed Loop which is about 30 seconds after start up. The combination of direct injection, weird spray pattern Rs4 injectors and no intake flapper motor attributes to this. So somewhere there is a map that sets definitions on initial start up that isn't available to us. Supposedly a few tuners have this issue fixed but for guys like me it's a battle.
Rather that reinventing the wheel Ill post this link as it taught me the basics a few years ago and Bananas is still I guy I learn from today. While this is for me7 most of the maps apply except for BVC, IC, and anything main fueling related. With Med9 tapp has made this a click for either s3 or rs4 with his wizard.
http://www.eurodyne.ca/forum/viewtopic.php?f=33&t=689
My questions to the gurus, the values in the target rail map, are these arbitrary values are do they mean anything becasue mine max at 13.5 over 50% load and upper rpms? Same question for the low pressure map except these values are maxed at 580? The rest is pretty much what Im used to with med7.
13.5 is 135bar. You're tune should peak at this. Adjust as necessary.
I had minimal luck seeing changes on the 2 low pressure maps. I've had multiple pumps and don't see any change for the most part.
Sent from my Galaxy Nexus
Sent from my Galaxy Nexus