Oh, yes. Indeed an increase at altitude.
Thanks, so with the EC tune you appear to be getting better than stock performance even at 0.82 atmospheres of air pressure. EC doesn't have any data on the altitude issue and one thing making me hesitant is if I will get any power increase in the 6500-10000 foot elevation range.
EC: I do not understand the purpose of turning down maximum power in A mode, I do not think it helps fuel economy unless the driver is a "lead foot". What I think is important in A mode is keeping RPM low, shifts smooth, and converter locked. Also, as another forum member already noted it makes no sense at all for the car to be slow to respond to paddle shift requests in any mode.
With the stock A mode the car seems too eager to downshift on slight inclines and too reluctant to shift into 8th gear.
I notice that engine braking seems to be more aggressive in D versus A. I presume that is good for fuel economy and so sort of a desired behavior.
Hey Lockem,
I enjoy you sharp wits and geek-speak on this forum, so I’d like to elaborate my reply...
First let me preface, this is a subjective impresssion, in lieu of dyno data to back it up.
I had the opportunity during the T57 update to drive the car for a few days after down-grading the P1 tune back to stock, and drove it enough to have the ECU performance parameters auto adjust back to stock+150 miles, which re-establishes (improves) the performance (same as the post P1 upgrade 200 miles or so, the car “learns” how to be fast). Immediately after the downgrade, Giulia takes a very obvious performance hit, loses its’ neato N mode downshifting, gets a little clunky shifting from a deadstop during regular driving, etc.; and, mind you, this was all pre-T57 updates, so truly apples to apples. The V2 intake and Corsa exhaust were both installed, so not entirely a stocker — a little HP increase from both, with improved low-end torque improved by (mostly) the V2.
My driving includes a weekly session in the nearby canyons, which take me from my base of 5,300 to 8,888 (Wondervu, CO) where I turn-around. I did have a session just so, the day before my T57 service, and a couple of observations (again subjective) were:
1) I know this stretch of road quite well, and have a series of turns and charges pretty close to the high elevation, where, with the P1 tune, the car breaks traction exiting turns, gets minor nannies/and/or LSD correction+FWD intervention, after getting slightly sideways. Without the tune, no such corrections.
2) on a particular short straight, after WOT from prior turn, I enter the next turn at, (not wanting to self incriminate) let’s say X mph. Post de-tune, my entry speeds was fully 10mph less (X-10). This was pretty close to the 8,888 ft turnaround.
3) Just in general, even at elevation N mode was back to N mode (plus better sound and torque), D mode was still tasty, but not snappy
A final comment, the Alfa ECU does compensate for the reduced APressure, which I can see in the ODBII data stream. Seems to request 2-4 additional PSI boost up to about 8,500 ft, afterwhich it just does its’ best. Mind you, I’m starting at 5,300, not sea level. As is said, the driver mostly lives on torque for daily driving, and the P1 tune substantially increases torque, which is undenyable in the “jump” of the car.
I would say that the performance of the Giulia at 9,000 with P1 outperforms, by a noticable margin, the 5,300 foot performance of my untuned car. I doubt you’ll be unimpressed. Just my 2cents.
Out,:nerd: