Sorry to confuse you Zman.My car shifts like yours(whenever it feels like it)in the manual mode.It's just that when testing I started in M1 and push the shifter at about 6200 rpm,but the trans only shifts when it's ready.

 

Hi g-man:

I extended the optimum shift-point analysis (attached) to consider the possibility that my Step is shifting at
either 6.7k RPM or 6.6k RPM. The analysis suggests that shifting at 6.7k would be best and that shifting at 6.6k
would be next best. So, overall, my analyses suggest that the higher the Step shifts the better--at least up to
6.7k. That's good from my perspective since I have no real choice but to let the Step shift at its max. Perhaps
you have a choice. If so, then I'll be very interested in what you conclude after experimenting with judicious
manual shifting. The numbers I used in my analyses are not exact, but I am very confident that more precise
values would not change my conclusions.

Earlier, when my car allowed to let me shift judiciously manually, my g-meter showed that I could not do better
than letting the Step shift automatically. But, also, those results came in before my car got so fast. So, maybe
things will be different for you.

 

Your right Znod I did misunderstand your 6700 rpm shift point.I thought you considered this a good thing.Does it shift any sooner in D?

I have no better answer for the large discrepancy in rpm drop from 1 to 2,but I do think it is a phenomenon common to all 545 steps.

 

I'll check out your question about D for sure, but I think it shifts at the same point. And, we were posting at the same time. Check out the post right before your last one. Did you see the latest on the g-meter testing thread?

 

I see. Got is. I thought that was what you said before, but then I got confused.

I checked on two shifting issues today. First, my car shows shifting at the same RPM whether in D or DS. Second, I confirmed, using the hidden digital tach, that my car is shifting between 6.4k and 6.5k--which is what the Pro RR says. So, I'll added another layer of trust to what the Pro RR shows. And, all still is well because such shifting looks optimal to me given that we can't shift higher. However, I am yet to reconcile even most of the shifting data mentioned before since my car is not shifting at 6.7k.

I updated my adjusted bests for todays passes in post #1. More on the g-meter testing thread soon.

 

I know; it looks like I am replying to myself. However, I think that allowing this appearance often is the best way to communicate new information. In any case, I have improvised a shift-point analysis based on actual data provided by the Pro RR. I think that the analysis is superior to the ones posted on this thread. In this regard, I have determined that my Step definitely shifts at about redline (e.g., about 6,450 RPM from first to second). The new analysis, on this thread at post #293, suggests that optimal Step shifting would occur at less than "redline." For example, shifting 50 RPM below "redline" appears to be superior. The implication is that a good shift program, which allows "real" manual shifting with a Step, might yield superior results. The analysis also suggests that shifting at redline may not be optimal for manuals and SMG's.

 

Yea, I prefer this method over editing posts as one might miss updated info. It's always a work in process and sure to have new thoughts or insights into data interpretation. I was about to make comment in the "closed" thread that these threads have pretty clear titles and those not interested can certainly stay OUT

My meter is due on the 8th. I need to get out right away and test as my car goes in on the 10th sure to get 20.01 or higher. I am not going to have much time to perfect launch technique even with all your guys' help and get a good before baseline. Fortunately wx is supposed to be clear but warm for the next 5 days.

 

What! You bought a meter dave?

 

Hi cd:

Good deal. If you are going to do a full 1/4, then be sure and collect, as near to the time and place of your tests as you can, your temp in F, dewpoint in F, barometric pressure in mercury, and altitude. Airports, including small locals, tend to provide at least hourly online updates on these things. So, chose the airport closest to your test site and find its weather reporting page. Also, for altitude and temp, you can use your car's meters if you can't do better. Without making at least weather adjustments, you comparisons could be very misleading. I am just not gaining a full appreciation of how things can reverse because of seemingly small weather differences.

 

Hi cd:

There is a way to handle weather/altitude data other than doing full quarters. If you will send me the weather/altitude data I mention after each test, then I would calculate your density altitude values. Then, you would at least know if your performance should have been better or worse from test to test.