+1. While I'm not affected by this personally (and I don't do time trials in my non-existent 991), I am curious about this.

 

Hi Pete,

Unfortunately, the rpm drop is most pronounced when you're shifting at redline. I didn't notice much of an issue during the break-in either.

 

I saw a quote form Porsche somewhere that said that 7mt was derived from pdk with a higher third to improve fuel economy.

 

... Because there is a lot of cruising around in 3rd for the mileage conscious?

They had to hit that 'city' rating.

 

The tech manual does say that 3rd gear has a higher ratio to reduce fuel consumption, but that's a little hard to understand given the city test procedure (attached). Perhaps it's better suited for the German fuel consumption standards.

ChuckJ

 

lol! Thanks for attaching that. This is actually one of the reasons, over the last two/three years of owning a dual clutch car for almost 5 years, have I started preferring to shift manually, because I'm tired of the gearbox racing to top gear by 32mph (quite literally).

Mileage be damned!

I understand EPA ratings, federal laws, etc... - but who the hell buys a sports car for its mileage (I know there are more than a few of you here)?

Yeah, because with my $200k Porsche Turbo S, I'm concerned with saving $30 a month vs buying a Jetta. That will equal out in about 80 years, just in time to trade it in.

 

I will say that when I had the 991 C2S Cab 7-speed manual press car, I was in 3rd gear whenever I did city driving under 40 mph a lot. But part of that was to make sure I could gear the glorious PSE.

 

I only have 500 miles on my 991 C4S so I am shifting at 4000 rpm. Every shift seems to be just a blip with RPM's dropping about 700 to 800 in all gears. Don't want to put those number in concrete...but I think that's pretty close.

 

That's because the higher the wheel rpm is, the bigger the gap will be due because different gear ratios are multipliers. That's why it isn't that noticeable at lower rpm shifts.