Vems firmware 1.1.80

[Jamo]

I only downloaded the nightly build for the 1.1.80 ini

Why would you want boost offset?

[A80Avant]

because without it you are obligated to build the whole DC table to get accurate boost. Otherwise if you just build the DC or rpm/kpa graph, it may not end up being what you ask for. So how do you deal with that? Different spring in the wastegate? different load on the wastegate? aftermarket boost controller and vems not managing boost?

in megatune versions what you did was set a DC vs rpm or kpa vs rpm graph and if you were off by a few kpa regardless of the wastegate spring you used, etc you just used this feature and you got the boost curve where you want it.

Now with vemstune when it comes to build high boost areas, you cannot do that, because it is not there. Either you have to vigorously build the 12x12 DC table ( i guess) OR incorporate this feature in.

According to the developers they are 'working on it'. but because most people using these aftermarket ECUs they rely on electronic boost controllers anyway, i believe they are not really bothered.

[Jamo]

Boost vs rpm works just fine for me always hits my target boost but then I have a 4 port solenoid

[loxxrider]

I've been using n75 on the stock turbo with VEMS controlling it closed loop. I haven't had any problems with it since I figured out how to tune the PID.

I haven't tried it on the new Holset yet though...

[A80Avant]

what boost levels have you reached jamo? because the offset feature on mine was useless up until 1.7bar. I found that when i went to 2+ it was required.

PID will determine how fast it will reached the desired value and if it stays there without fluctuating. What if you have a stiff spring in the wastegate and no matter what kpa/dc you specify it always gives you a boost curve lower than the specified on all the rpm spots. What changes do yo do to the PID then to cope? it would be interesting to know!

[GazzaG60]

i just think vemstune needs a really clean old style connection.

you feed it a basic dell D600 serial port and its great. megatune works on a speak and spell or a "my first computer".

whens she's legal again ill take the upgrade path. i want to get a nice 1.1.27 map first. i got a few copies of 1.1.23 jamo. its very essy to work with. i need to think a little more about the upload next time.

ive had similar issues with documents on all ECU's. if you get the right person your issue has to also really be something they too have thought about.

[Jeffer]

I'm running on 1.1.80. Seems to work fine. I went to this version because of the new scope feature. Now its possible to scope both crank and hall trigger.

[Jamo]

what boost levels have you reached jamo? because the offset feature on mine was useless up until 1.7bar. I found that when i went to 2+ it was required.

PID will determine how fast it will reached the desired value and if it stays there without fluctuating. What if you have a stiff spring in the wastegate and no matter what kpa/dc you specify it always gives you a boost curve lower than the specified on all the rpm spots. What changes do yo do to the PID then to cope? it would be interesting to know!

Max I have had is 1.7 bar, stroker doesn't need to go higher boost, think the difference in setup is I don't use the kpa/dc as boost tuning was re-written in 1.1.70 upwards I think and it acts differently.

The boost vs rpm map works well for me with the 0.9 spring, I simply turn the valve off in the settings below 0.5 bar and let it start to apply duty above this value.

I haven't experienced the problem you've had getting a different boost curve to be honest hence I haven't had to delve further into it

[Jamo]

I'm running on 1.1.80. Seems to work fine. I went to this version because of the new scope feature. Now its possible to scope both crank and hall trigger.

Done anything with the injector angles? I settled on 1.1.74 as it was rock stable for me with the new idle pw as well.

The new protocol which allows better logging I've yet to try, sounds like it works for you

[Jeffer]

I'm still in the progress of making the basemap. It idles fine atm. Still havent had a chance to map the car on load. Soon......

[A80Avant]

well, as you say, you havent gone more than 1.7bar so as developers are trying to implement it, it tells me that there is work in progress. I would appreciate it if they just came up with a nice universal latest firmware that would cover all aspects to a good extent, and not deliver some adjustment every week or so. I understand why they are doing it, but i haven't come across someone from Vems saying: here is what our next ECUs will be delivered with from now on. It works great and has all options so far.

so, mine aint broken so far, so im observing at the moment.

[Jamo]

I'm going to wait on 1.1.80 I see there is a bug introduced in 1.1.79 that hasn't been fixed yet regarding TPS position sticking in the firmware

[GazzaG60]

well i now have an MOT. yeeehah

so next job is to clean the car then look at the firmware and vemstune. boooo

so are we saying 1.1.74 is the version at the moment. bearing in mind i dont need to worry about boost control.
whats the ideal upgrade path?

[Jamo]

I'm currently using 1.1.74 without issue you maybe better going to 1.1.70 1st then jumping to 1.1.74

[Jamo]

Working 1.1.80 on Audi S2

http://www.vems.hu/wiki/index.php?page=MembersPage%2FAlexHoy