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Lack of bigger turbos and tuning. Discuss.

230K views 1.1K replies 80 participants last post by  Richie Haynes  
#1 · (Edited)
Why are there not full frame or at least hybrid turbo options and more robust custom tuning options for the 2.0T Giulia after a good 2 years? I'm finding it rather annoying that nothing has came to the market with these with such an easy turbo location for replacements and easy ecu to deal with similar to continental simos ecus. Even the downpipe options are sparse and it's only 2 bends with a funky turbine flange. This engine is after all fully forged; crank, rods, pistons with oil squirters which could easily support 500whp/450wtq with proper calibration/fueling.
 
#145 ·
I just flashed back to mod file last week. I will log the stock one next time I flash it..as it is a pain to flash back and clear all the errors using the handheld. I know my 200hp is only software limited and in stock form max boost I have seen is 18psig. Using Torque pro with the mod file, I am seeing 22.5 psig which seems quite low for a 325hp tune, compared to what others are seeing on their modified 280hp. I will log with MES and see what I get.
 
#150 ·
It can be truth that there is not enough fuel to get more hp. Or sth in ecm is cutting boost in high range.

Wysłane z mojego SM-G973F przy użyciu Tapatalka
It looks likethe tubo size is the limit to me. I can offset as much as i want with jb4 and when i request too much up top i just get limp mode and wastegate code. Thats coomon to when you request more than turbo can do. No lean codes. No fp issues. Also the nice thing about jb4 is the ecu doesnt see the added boost so any torque limiters get effectively bypassed since the ecu thinks its making less power than stock.
 
#159 ·
I am finding this thread extremely interesting and coming from the engineering profession validation by data gathering is the best way to learn. Just trying to understand what WGDC means and I found this article quite educational. I know our cars have a electrically controlled wastegate commanded by the ECM. I am probably the least experienced in all this here so keep it coming guys. Need to polish my grey cells.

 
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#161 ·
Yep. Figured that out after reading the article. Thinking about it, I am not surprised by the stock turbo and wastegate control, it was clearly designed for street driving with low down torque in mind.
 
#162 ·
As cars become more and more efficient electronic wastegate control is the norm. Audi has been doing it since 2005.5 in the a4. Well see what testing terry can do to see if controlling the wg directly can do but i am guarded in my optimism as the flash tunes seem to be limited up top too.
 
#164 · (Edited)
Would love to know how ec p2 is making 390chp (or even 340chp) with only one psi more than stock at redline and only 3 degrees more timing than stock up top. Id really like to test out their tune in hopes for the best and i REALLY like their idea of a performance tc/esc but i dont want to throw away money either. Grrr

Mike
 
#166 ·
Would love to know how ec p2 is making 390chp (or even 340chp) with only one psi more than stock at redline and same timing. Id really like to test out their tune in hopes for the best and i REALLY like their idea of a performance tc/esc but i dont want to throw away money either. Grrr

Mike
you answered You’re own question. Most likely not making 390chp. I would guess with stock turbo would be hard to get 340chp. Now they do show a promising 50-60 whp gain and that’s substantial. JB4 is most likely same or better when combined with exhaust and intake. In the end I think it’s maxed out on 2.0 so It’s a preference thing.
 
#170 ·
Did you try lower values like 1 or 2? What were you using to log your parameters witech or mes because you had wgdc in your log.

Boost logic is probably more involved than just requesting higher boost and it seems no one fully understands whats going on. But i wouldnt say that the turbo isnt capable of pushing more at high rpms.
 
#171 ·
Im using jb4 to log. Very easy setup. Even auto logs at wide open throttle 24 hours a day if you set it up that way. Right now i have it requesting 7psi over stock at low rpm tapering to 3psi over stock at redline and you can see from the logs what it can actually do for now.

Similar boost profile as ec p2 although more with jb4 in logs posted but ambient can impact this so dont want to draw conclusions.

Terry thinks its possible he can get a bit more top end directly controlling wastegate but wants to test extensively in house first as he doesn't want to be responsible for blowing turbos on customer cars as he told me :)

Still cant help but be reminded what squadra tuning says about stock turbo...



As stated earlier, the 2.0 Turbo MultiAir engine of the Giulia Veloce has been put on the market with 280 hp and 400 Nm. However, the rollingroad shows very different values. Everything between 440 and 460 Nm and between 280 and 310 (!) Hp is possible. The first-produced Giulia’s scored highest.

Despite these major differences, the big question for us was how much extra we could still get. After a lot of research and testing, we can only say that there is not much extra in it. With some turbo pressure increase in the mid speed range, about 20 to 30 Nm is added. By advancing the ignition at higher speeds around 10 to 12 hp. Increasing turbo pressure at higher revs unfortunately brings nothing extra. Except for an increased risk of ignition problems due to too much back pressure from the catalyst. Refueling with a good fuel is a must, see later in this article.
 
#172 ·
@bhvrdr thank you for info.

Yes one could increase boost by manipulating the wdgc but who knows what else is involved in the feedback logic and changing wgdc may end up being compensated somewhere and do nothing, or something completely unexpected. Or limp, wgdc doesnt match boost request for example.

I cant wait to get my hands on MES to start logging my car.

Anyway, i think with right fuel these engines are capable of plenty. But we have to know how to work the logic to our advantage and use fuels like ethanol/methanol for extra gains.
 
#176 ·
Wgdc doesnt match boost request is a perfectly reasonably explanation of why you cant just crudely change one when there are tables probably addressing rpm v wdgc v boost request.

The comp gets confused and limps because the boost it is targetting is exceeding wgdc values in the table matching min/max for such boost request.
 
#179 · (Edited)
Guys, it is quite late here in the UK and I am meant to be up for work at 5.30am tomorrow but here I am with the promised logs. I did what was suggested, 5th gear from low engine speed in Dynamic mode manual shifting all the way up to ~6k rpm with open throttle.

For full disclosure my spec:
2.0 200 HP (dyno tested as 225bhp) with exactly same engine and stock turbo as 280hp Veloce variant.
January 2017 built.
Remapped using Celtic tuning Emotion 2+ self flashing tool to 324 bhp and 350 lb/ft torque (claimed by them).
Map was developed using another UK forum member 280hp donor car on Celtic Tuning's own dyno facility.

Mods:
Sprint air filter.
19" 8.5J, 10J wheels.
Seletron Pedal Booster.
GFB DV+

All data logged using MES 4.6 Multiplex USB cable connection (No WGDC on MES)
Max boost was between 27 an 28 psig on almost all the runs. Stock 2.0 200hp engine is about 18 psig.

The 2 best runs I got:
Image
Image



EDIT: Raw data file here:

 
#185 ·
Guys, it is quite late here in the UK and I am meant to be up for work at 5.30am tomorrow but here I am with the promised logs. I did what was suggested, 5th gear from low engine speed in Dynamic mode manual shifting all the way up to ~6k rpm with open throttle.

For full disclosure my spec:
2.0 200 HP (dyno tested as 225bhp) with exactly same engine and stock turbo as 280hp Veloce variant.
January 2017 built.
Remapped using Celtic tuning Emotion 2+ self flashing tool to 324 bhp and 350 lb/ft torque (claimed by them).
Map was developed using another UK forum member 280hp donor car on Celtic Tuning's own dyno facility.

Mods:
Sprint fair filter.
19" 8.5J, 10J wheels.
Seletron Pedal Booster.
GFB DV+

All data logged using MES 4.6 Multiplex USB cable connection (No WGDC on MES)
Max boost was between 27 an 28 psig on almost all the runs. Stock 2.0 200hp engine is about 18 psig.

The 2 best runs I got:
View attachment 98310 View attachment 98311


EDIT: Raw data file here:

Oh I have now linked the raw data log from MES to previous post. Copied here again. This has a few additions of sensors.

 
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#184 ·
@Triumph23 interesting. Air temps stayed same, spark advance 4deg, and boost 28 taper to 22.

Did they have you just flash and go or log and report back? I contacted them via email but no answer yer perhaps because i am in USA.

Thank you for sharing.
I have to admit apart from understanding the boost pressures and it being 28psi max staying about 26_27 and tapering down to 23psi at redline, none of the other stuff mean much to me. But I am interested and intrigued to learn.
So how does my flash tune look? What do the spark advance numbers mean in reality?

This was a self flashing tune uploaded by myself as they are 250 miles away. They would have dyno tested if I was physically there though.