VEMS firmware versions

[Jamo]

I see a lot of VEMS users on here are running 1.1.27

Is there any reason to run this over the release 1.1.57?

[A80Avant]

yes
vems offers new versions that have been partially tested and may not be 100% functional. This is why vems still ships ECUs with the 1.1.27 version. Otherwise it would give out the new versions.

having said that i know now that the 1.1.62 version which operates with VEMSTUNE not megatune is concidered to be the next official firmware. Im planning to try that out next year, if Marc has managed to get a good config. out of it to start from

[Jamo]

Where are you getting the information on this from A80avant?

So one would be best to start out with 1.1.27?

I've heard 1.1.47v2 is good for boost control

I need to re-register to the VEMS forum I think

[A80Avant]

i talk to Marcel and Marc. Marcel is the person who makes VEMS.

Initially i started with 1.1.44 which didnt really work properly. I think the problem must have been the timing values though. I know that other VEMS tuners in the UK use that version without problems. I think(not sure) that the 1.1.44 or maybe 1.1.47 are the last versions that can be used with megatune. All others after that are with vemstune.

all intermediate versions have had small glitches here and there. Marcel is confident that 1.1.62 is working properly, although Marc is still working on it.

a lot of things are different from 1.1.27 to 1.1.62 though and its like using a new aftermarket ECU really.

hopefully the basic settings should work the same, and it would only be managing all the new tables.

[Jamo]

So what version do you recommend to start with?

[Bram]

Start with 1.1.27

[a4kquattro]

Start with 1.1.27

agree. you'll find the most community support for it at the moment since so many people are on it and its a tested and known quantity.

1.1.62/3 looks nice so far. If you are adventurous you can give it a go. Personally I'm liking vemstune much more than megatune as I use it more and more. The newer firmwares like 1.1.62 generally no longer support megatune, which isn't necessarily a bad thing IMO.

[A80Avant]

yes i agree about starting point.
some would actually say that since the 1.1.27 is 'not broken' then dont fix it ie dont change it.

[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

[Bram]

And also I would like to know if VEMStune offers additional features that make life/tuning easier or better, or is it the same as Megatune, but with just a different GUI?

[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

[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

[Jamo]

So what is wrong with 1.1.44 and 1.1.47?

[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!

[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?