Alfa Romeo Giulia Forum banner
221 - 240 of 1,111 Posts
@stocki... time 134-140sec, how come your rpm is all over the place with throttle at 99.8%? We got 6132rpm then 4978 then 5053 then 5300.. are you seeing what im talking about?

But you got 3.375deg up top too. Anything in MES parameters mentioning knock or perhaps wastegate/wgdc?

Thanks for all your input on MES. Alfissimo is out of his 115$ package for obdii interface and two cables. Gonna try finding them on ebay or amazon, but what exactly am i looking for as im certain it isnt blue and grey connector (albeit the grey one says grey on it lol).
 
@Dj-oohlya There is nothing resembling WGDC or wastegate under 2.0 engine in MES. The Quadrifoglio has one. See last image.

There are Knock sensor voltage signals for each cylinder. Have you downloaded a copy of MES and had a play in simulation mode? You don't need to connect to ECU or need a cable for that.

In MES there is a top level spark advance and then individual cylinder reduction adjustments based on measured knock from the top level target set by the ecu. I only logged the top level spark advance. I will log the knock sensor and individual cylinder reductions next time.


Image
Image
Image
 
  • Like
Reactions: Dj-oohlya
@Triumph23 i have not downloaded it yet. I am at work currently and looking up where i can get the cables. I found the grey one on ebay, lead 6 they call it. I found the other too, lead 5.

I do plan to download it tonight or tomorrow most likely and play with it a bit. But I know i will be buying it if nothing to help me get rid of oil change reminder in my infotainment and dash and troubleshoot stuff on as need basis.

I did get an email back from CT and looks like im good to go and dont need a SGW most likely due to car being 10/2017 production.

@Triumph23 wouldnt turbo actuator arm % be same as wgdc%?
 
Just got the obd to usb and the two cables from a bloke in UK on ebay for 45 quid.

Do i sound British at all?
Lol. Yo bruv. Very brit. In'it!

Alfissimo has the cables on his webshop in USA. Good news on the CT being compatible. Hit me up if you need any install help.

That turbo actuator screenshot is from Quadrifoglio module simulation! Nothing on 2.0
 
Maaaan you had me excited for a second. I even went online to see if there is any difference between actuator and wgdc 🤦🏻‍♂️
Someone I think @DeXa suggested I can still connect to Quadrifoglio module as selection and log this wgdc, but other engine parameters may be nonsense. I will test it when I get time and report back.
 
  • Like
Reactions: Dj-oohlya
@stocki... time 134-140sec, how come your rpm is all over the place with throttle at 99.8%? We got 6132rpm then 4978 then 5053 then 5300.. are you seeing what im talking about?

But you got 3.375deg up top too. Anything in MES parameters mentioning knock or perhaps wastegate/wgdc?

Thanks for all your input on MES. Alfissimo is out of his 115$ package for obdii interface and two cables. Gonna try finding them on ebay or amazon, but what exactly am i looking for as im certain it isnt blue and grey connector (albeit the grey one says grey on it lol).
This log was just to demonstrate spark advance reduction.
It was auto-shifting through the gears (not locked to 5th)
 
Ok so I managed a log using MES QV selection option to get WGDC which is labelled Turbo actuator command. I also logged Turbo Vacuum Valve position which shows as Open only at the end of the redline run in 5th gear. Not sure what this means, wastegate open fully?

Rest of the parameters look ok, not sure they are 100 % accurate compared to connecting as 2.0 ECU, the vehicle speed in km/h for example is completely off, I was doing more like 100mph+ at redline. Max boost was ~30psig but in subsequent runs it seemed to jump up and down a little so I picked the best run at the beginning.

So what does this WGDC numbers tell? I have no idea! It is late again at night!!

Image
Image
 
I dunno how to interpret the entire plot, but desired boost dives together with actual boost at near the redline. It appears that something is being protected rather than squeezed for max performance.

My 1971 Norton Commando had max horsepower at the redline; a less desirable situation than you might think. One miss-shift and you get to rebuild the head...

Don't forget although it is often possible to squeeze a little extra (inefficient) boost out of a turbo, that can result in overspeeding the turbine which can then explode or otherwise fail. The PCM also has to guess at and manage turbine RPM.
 
Reading this article again, assuming the WGDC measurent on my graph is reasonably correct, it seems like WGDC is rising gradually, steadily from 6% to 57% and is not maxing out even at the redline when I hit the rev limiter or was close to it and I backed off, meaning there are no significant restrictions on the exhaust side? Can someone review and explain if this looks correct and what you interpret from it for turbo performance/ECU control of the boost/wastegate?

The tune appears to be well calibrated for a nice low down fat midrange torque and still enough grunt at the top end. My car certainly feels rapid with the way it builds speed. I feel the restriction is now the factory Cat for the turbo perhaps? I certainly do not want to lose the nice low/mid range torque I have for the sake of extra power at the redline where I rarely drive, except when I am data logging :) So no bigger turbo or high flow cat/catless downpipe for massive dustbin sized exhausts for me.

 
Ok so I managed a log using MES QV selection option to get WGDC which is labelled Turbo actuator command. I also logged Turbo Vacuum Valve position which shows as Open only at the end of the redline run in 5th gear. Not sure what this means, wastegate open fully?

Rest of the parameters look ok, not sure they are 100 % accurate compared to connecting as 2.0 ECU, the vehicle speed in km/h for example is completely off, I was doing more like 100mph+ at redline. Max boost was ~30psig but in subsequent runs it seemed to jump up and down a little so I picked the best run at the beginning.

So what does this WGDC numbers tell? I have no idea! It is late again at night!!

View attachment 98378 View attachment 98379
Is it from 2.0t? What tune do you have? 3040mbar desired is very high.

Wysłane z mojego SM-G973F przy użyciu Tapatalka
 
Is it from 2.0t? What tune do you have? 3040mbar desired is very high.

Wysłane z mojego SM-G973F przy użyciu Tapatalka
Not sure if you followed my earlier posts, mine is a 2.0 with UK Celtic Tune to 330HP. As MES 4.6 does not have Waste Gate Duty Cycle (WGDC) under the 2.0 ECU parameters, I connected MES via 2.9V6 setting and logged the above graph as this has WGDC. I would not pay too much attention to the desired and produced boost values absolutely, rather take is as a comparison too. In my much earlier graphs using the correct 2.0 module MES reported a max boost of 28.5 psig. I only datalogged the recent one to see what the WGDC was doing as per @Dj-oohlya 's request.
 
  • Like
Reactions: Dj-oohlya
Not sure if you followed my earlier posts, mine is a 2.0 with UK Celtic Tune to 330HP. As MES 4.6 does not have Waste Gate Duty Cycle (WGDC) under the 2.0 ECU parameters, I connected MES via 2.9V6 setting and logged the above graph as this has WGDC. I would not pay too much attention to the desired and produced boost values absolutely, rather take is as a comparison too. In my much earlier graphs using the correct 2.0 module MES reported a max boost of 28.5 psig. I only datalogged the recent one to see what the WGDC was doing as per @Dj-oohlya 's request.
Could you make logs air temp?

Wysłane z mojego SM-G973F przy użyciu Tapatalka
 
Could you make logs air temp?

Wysłane z mojego SM-G973F przy użyciu Tapatalka
I did buddy. It's all here. Air temp = After intercooler is steady ~40 deg C even at redline as you can see. I see no benefit in upgrading the intercooler of even running it 100% of the time. The ECU appears to be modulating IAT post intercooler very well and very efficiently.

 
  • Like
Reactions: Dj-oohlya
On stock turbo 2.1b in peak isn't it too high?
Do you have possibilities to measure 100-200km/h?

Wysłane z mojego SM-G973F przy użyciu Tapatalka
Have a look at post #236 and the link to my CORRECT datalog. I cannot log 60-130mph or 100-200km/h , no dragy and no legal roads ;)
Like I already explained 2.1b or 3044mbar absolute peak boost is measured using the 2.9V6 MES setting (for logging WGDC which only 2.9V6 engine setting allows) which sometime reports erroneous values. Look at my CORRECT log before jumping the gun ;)
 
I did buddy. It's all here. Air temp = After intercooler is steady ~40 deg C even at redline as you can see. I see no benefit in upgrading the intercooler of even running it 100% of the time. The ECU appears to be modulating IAT post intercooler very well and very efficiently.

I didn't see this post.. Could please past one more time? And ingitnon timing

Wysłane z mojego SM-G973F przy użyciu Tapatalka
 
I didn't see this post.. Could please past one more time? And ingitnon timing

Wysłane z mojego SM-G973F przy użyciu Tapatalka
If you click on the link in the post it should take you to my original logs and all the details I posted. Anyway, here is the plot. It has timing under "Spark Advance"

Image
 
221 - 240 of 1,111 Posts