Audi RS2

[AVP]

at least thats the only option on the 1.1.27 version.

hopefully i will be upgrading the firmware in a few months.

any suggestions on which vemstune/firmware to upgrade to?

[rob@vems.co.uk]

Wait and see what the recommended version is when you're ready to upgrade

[AVP]

i see, anything fancy coming out after 1.1.70 then?

[rob@vems.co.uk]

Who can say
But bugs are found and fixed, new things are added, and the best one to use should be evident at the time.

[AVP]

does that mean that even 'testing' vemstune versions are to be used by users,and not only developers?

[rob@vems.co.uk]

I don't know if I've ever seen anything that even closely resembles a release.

[AVP]

aaahh i seee.

so even if i do change to what a tuner would suggest, then it is likely that i would change again shortly thereafter..!


noticed firmwares are now up to 1.1.75!

[rob@vems.co.uk]

So they're pushing through with brainstorming on 1.1.7x without releasing 1.1.74

[mattias]

Among other things there is some re-design on how Alpha-N with MAP compensation works.

[AVP]

mattias, i am very happy for all the work that is being done, and the new features implemented.I hope a stable release with info regarding the new features is soon released that can be used as safe as 1.1.27 once was(and still is)

[AVP]

car is now running on the new turbo.

on cold engine it seems that on low revs, from standstill and low TPS i get something like a fuel cut effect, as if not enough enrichment or something is going on. Also sometimes the log registers high rpm signal when this happens and the car just kicks forward violently.

Once i have enrichened the mixture it seems better, but this is something new..

[AVP]

i have a question,
I use the megalogviewer, to adjust accel enrichments. I notice that when the throttle opens and fuel is added, lamda goes lean first, then to the specified value depending on the bin.However when i take the foot off the pedal, the mixture goes righ before it goes to the fuel cut.

I did some test pressing and releasing the pedal while logging it and it does that all the time.

Also on cold engine the car is actually going very lean i think because of this.

why is it doing that? I have increased all accel enrichments quite a lot but still does it.

is it because the TB opens too fast for any enrichment to be enough?

i have 0.2/0.4/0.7/0.9 ms injec on the 4 bins
1.2sec of time
i had 28multiplication factor
and 3.6 ms for cold added amount.

I use 630cc dekas and from other engines i have seen, they use much less accel enrichments.Only difference i have is a 15% bigger throttle valve. Could that make all this mess?

[mattias]

You will never get the old acc enrichment strategy to work well under all conditions.
Upgrade to VemsTune supported 1.1.7x+ firmware for a better strategy with a table of % vs rpm in addition to TPS change.

[AVP]

yes i would need to do that mattias, but for now, i need to have the car in working order before i change!

any solutions to this? How do those accel enrichments sound?

[gunni]

Do you feel stumpling or hesitation from the engine?

If not then your fine, hunting for a steady lambda while accelerating the throttle isn´t needed.