Re: The "secret" about Manual vs. Tip performance?
Quote:
eclou said:Quote:
RC said:
Since you repeated exactly what you said a few posts earlier, I do the same:
The 997 Turbo Tiptronic and the 997 Turbo Manual have a different software mapping, I don't understand where the problem is. The motronic "detects" the kind of gearbox from the programmed identification codes and switches to the correct mapping. There are also different software variants for different markets. Don't understand why this is a surprise for you?!
OK?!
You are trying to assign some special meaning to a normal phenomenon. That is all I am trying to explain.
Change the 5spd to a 4spd, the motor will build even more boost in the lower gears. Conversely, put a 7spd in and it will build less boost. Add a torque converter with a higher stall and it will build more boost. Use a converter with less stall or a DSG with no converter and it will build less boost.
If you do not understand these concepts then I would suggest educating yourself about it before chanting your same opine over and over again.
Eclou,
While it is true that an auto tranny's torque converter mechanics, including stall speed and gear numbers, influence boost, the PRIMARY determinant of boost pressure is the engine output and turbocharger impeller and compressor interactions which dictates how much exhaust gas pressure can transduce turbocharger compression and subsequent increased gas/fuel combustion (and peak engine output)-ALL of which is regulated by the engine ECU-which is controlled by the ECU's software (and easily manipulated in modern cars through the use of a computer)-the main reason 911 turbo's are so easily tuned-simply by re-programming the ECU to increase boost. This is readily accomplished in manual and Tip vehicles (so long as the boost is tolerated-mechanically and thermodynamically by the engine, turbo's, boost hoses, and headers).
So both the 997TT manual and TipS can (and WILL) be tuned by tuners (and by PAG-they will call them the GT2 and TurboS-ever hear of those model variants?). And each will require DIFFERENT software programs, manual versus Tip, USA versus Europe (due to different emission regulations), even for lower versus higher octane uses-Evolution Motorsports in Arizona where I got my upgrade for my 996TSCab is working on different software programs for 91 vs. 93 vs. 100 octane 997TT upgrades for those with different fuel uses in different parts of the country.
Now why can't you accept that the programming of a stock manual vs. a stock Tip 997TT is different (they have to be since the mapping will differ at each throttle/rev point for manual vs. Tip), and that max. boost can be adjusted differently between manual and Tip, with Tip relatively more boosted? In fact, when we all learned here on rennteam of Tip's "official" superior performance over manual in the 997TT earlier this year, I specifically suggested that this was achieved via Tip's being programmed with different boost vs. manual to achieve that superiority, and RC's post today seems to support my contention.
Certainly, PAG marketing could want to do this to attract the Mercedes Benz auto. tranny demographic- even though many of us rennteamers (perhaps both you and me ) might not want this.