VEMS firmware versions

[A80Avant]

1.1.62 is already out and downloadable from vems website.however i am too worried in doing something like that on my own before marc has fully tested it.

also because of the new tables im afraid you will probably need to retune the car.

[Bram]

oh another couple of nice safety features that i like on 1.1.62 are the EGT/Boost reduction and fuel/EGT increase.

so there is an option to reduce boost if EGTs go higher than specified OR/AND increase fuel if EGTs go higher

That feature would be helpful for my setup. When is the release of 1.1.62 to be expected? somewhere in the coming months? I hope the upgrade goes smooth, so I don't have to adjust any of the tuning parameters

[Bram]

yes, supported in 1.1.44+

excellent! Another reason to upgrade to a new VEMS firmware then. Do I also need to adjust the software of the VEMS round gauge itself? Or is it P&P?

[A80Avant]

hmm that is something that i cannot confirm. Vemstune has a .msq option possibly to read old firmwares but i doubt that you will able to do much with that.

not a big prolem though as if you have both softwares open you can just copy all settings from one to the other. The problem will occur if 1.1.62 is actually reading something different than what the old version did, esp. with trigger settings. Marc is working on that though.

Vemstune comes with a base map anyway,but it needs to be adjusted to everyones I5 individually

[Jamo]

So if you create a map on one version does it not automatically get converted correctly on upgrade to the new version?

[A80Avant]

oh another couple of nice safety features that i like on 1.1.62 are the EGT/Boost reduction and fuel/EGT increase.

so there is an option to reduce boost if EGTs go higher than specified OR/AND increase fuel if EGTs go higher

[GazzaG60]

with it being open source so to speak there are many adaptations to suit the individual. what usually is the issue is the chip can only hold so many command sets as you know so some features are removed to enable others.

im on 1.1.23rc. no issues. im still 12x12 but plan a move very soon to a newer firmware. having spoken to peter he has offered to help as its a pig to upgrade some firmwares. eg went from 1.1.23 to 1.1.44 and megatune wont connect to ecu says ??? try vemstune and its alive. not familiar with vemstune and to be honest never disliked megatune.

i would'nt worry too much about the firmware jamo. its not like othyer software where patches usually dont remove things but imporve things. you can turn a perfectly good running car into 5 pots of petrol with a vems firmware update believe me.

[A80Avant]

i didnt understand that last sentence.... what do you mean?

All the new versions have something added in and something changed.

For example on 1.1.27 you can change the coolant bins. On 1.1.44 you cant.
On all megatune versions you had the option of 12x12 or 16x14 version tables.

On vems tune you get specific size tables and dont have a choise. When i asked about making the tables bigger (16x14 or 16x16 as motronic has) so that you can have more accuracy, i was told that since VEMS interpolates from one bin to the other, larger tables are not required. So the only table that has 16x14 is the VE, and the rest are smaller. (lamda: 8x8, spark 12x12 etc)

I think for me that will be the most tricky thing,transforming my current tables to the smaler ones, as i do like to use a few bins for idle to control it better for example.Other than that i think its all a matter of getting used to the enviroment. Id say the best version to start is 1.1.27 though.Its proven that it is stable,and you have experienced vems users and tuners to help out. If everyone else is still experimenting on the latest versions, you may end up without a running engine for a while, or even worse!!!

[Jamo]

they dont have the MAT/IAT table.I think that is the most vital issue. Cause you can specify on what IATs your engine will retard timing. If you have tuned it properly to avoid knock at all times, older vems firmwares have a generic mat retard scaling which cannot be altered.But if the engine does not knock say even with 40C IAT, you will still get retarded timing, while on the latest firmwares you can specify that.

on the other hand you cannot cure that with overtiming the engine anyway, cause you might still get knock with low iat as well.

1.1.44 has the 2 accel enrichment table and the audi trigger. I found that the accel enrichment was not that important anyway,cause the 1.1.27 works fine

the gear boost looks promicing though!

So some of the newer versions dont have the functionality of the older versions

Now as you know I work in the software business and that is just barmby unless there are no controlled releases and versions are simultaneously released? ???

[a4kquattro]

Let's hope the VEMS developers will enable the link between the VEMS round gauge and the VEMS ECU by using the RS-232 serial cables. Actually I presumed this would be available from the beginning as it seemed such a straight forward use-case.

Is anyone working on this, or can I find out how to request this feature?

yes, supported in 1.1.44+

[Bram]

Let's hope the VEMS developers will enable the link between the VEMS round gauge and the VEMS ECU by using the RS-232 serial cables. Actually I presumed this would be available from the beginning as it seemed such a straight forward use-case.

Is anyone working on this, or can I find out how to request this feature?

[A80Avant]

they dont have the MAT/IAT table.I think that is the most vital issue. Cause you can specify on what IATs your engine will retard timing. If you have tuned it properly to avoid knock at all times, older vems firmwares have a generic mat retard scaling which cannot be altered.But if the engine does not knock say even with 40C IAT, you will still get retarded timing, while on the latest firmwares you can specify that.

on the other hand you cannot cure that with overtiming the engine anyway, cause you might still get knock with low iat as well.

1.1.44 has the 2 accel enrichment table and the audi trigger. I found that the accel enrichment was not that important anyway,cause the 1.1.27 works fine

the gear boost looks promicing though!

[Jamo]

So what is wrong with 1.1.44 and 1.1.47?

[A80Avant]

im not aware if vemstune has something like megaloger yet.

as for improvements:

Mat retard table: where you can specify the ignition retard depended on IAT.
MAT/TPS fuel enrichment table: configurable increase of enrichment depended on TPS angle
RPM/MAP correction table ( i dont know what that is for!!!)
2 different acceleration enrichment tables (were there on 1.1.44 version)
audi specific trigger settings (supposed to be more accurate with igntion timing)
Gear based boost reduction

as far as im aware those are areas that are different than current 1.1.27 version.

i didnt see any knock table yet but im told that there might be a knock table configuration for better action and less noise control

[Bram]

Is there a list of improvements from 1.1.27 towards 1.1.62? I mean not too detailed, but just the biggest additional features and improvements?

I ask this because this list does not directly give me that highlights over view:

http://www.vems.hu/wiki/index.php?page=RecentChanges&full=1

I have to correct myself. I found this version page:

http://www.vems.hu/wiki/index.php?page=GenBoard%2FUnderDevelopment%2FFirmwareChanges