frayed

Did you notice that flames come out the tailpipe under hard charging? Perhaps the ecu dumps fuel to keep combustion temps down like used in other applications. I would normally think that such an enriched mixture would not be used except under high load/high rpm conditions, but perhaps the EPA MPG tests include some high load cycling? I do not know.

But if you don't like the motor, PDK, weight, and tech, there's precious left to like.

Macca

In the USA they need to rob you on the fuel tax as they are giving you the car for free! Here are some deliveries taking place in Europe photographed two days ago.

jfr0317

Cool photos, Macca Thanks for posting!

Mike in CA

C'mon, Nizer. Respectfully, you've made your comments about what you dislike about the car often enough, I think we get the point. Besides, if those are really your concerns about the 991 GT3, why start a thread here with a negative (excuse me, "interested") comment about gas mileage of all things?

If you were expecting and you should have posted in the 997GT3 forum.

ShakeNBake

high revving motors are fundamentally less efficient than lower RPM motors because the majority of losses are a function of each cycle of the engine. That's probably one big factor. The second is Aero - while it's drag to downforce ratio is probably better than before, the GT3 still has one of the best aero packages of any street car, and that cost is mpg. The last thing I'd guess is the gearing - Higher RPM use.

But like the others, I couldn't care less about the fuel efficiency of a car like this. Those who do - please please please, buy something else, or Porsche will suddenly think we want a turbos and hybrid drivetrain too. (just like how we ended up with a heavier, electric steer, PDK and RWS ridden car

Mike in CA

I think the lower gear ratios are a big part of the mileage issue, especially the shorter 7th gear. Also, I don't believe that PDK is inherently that much (if at all) more efficient than a MT, but it earns it's high mileage EPA numbers in the Carrera because of it's default short shifting auto ECO-mode (which the GT3 doesn't have) and because of Start-Stop (also not on the GT3).

DFI makes a difference, but it's offset by the fact that the 991 GT3 squeezes out 40+ more horsepower than it's same-displacement predecessor. More power comes at a price.

All that said, I think in the real world, the new car will at least match, and perhaps exceed the old one, FWIW, which isn't a whole lot....

Macca

Mike. You are WAY too polite but I like that about you!

Nizer is all over the board slagging this car off. Its like someone came and stole his presents on Xmas morning. There are a few others around here like that too.

Its funny you know but when Rolex launch a watch a Basel I dont like I dont get on the Rolex boards and stalk the threads for that watch constantly claiming that the lug arms are too thick or the minute hand is too wide or it has an ugly dial.

It takes real dedication to follow an entire board on a product you arent interested in and systematically read and respond on every thread this way. I mean that's a real labour of love right? If you were my stalker Id just give up around now I think LOL!

Seriously though the only ting that could drive such dedication is jealousy. Nizer you are jealous of the 991 GT3. Admit it.

Actually mate you have so many cars you could buy that are much more authentic experience to teh ones you currently own and indeed the 991 GT3 like the ST rod/replica in your old avatar and the 64T in your current avatar. I just dont understand why you dont see this as a huge opportunity now to drop the modern 911 and get yourself some choice classic appreciating hard core air kooled metal? Prices in Europe & UK for good air cooled are seriously rocketing into investment grade territory. You wouldnt have to worry about MPG either?

frayed

does aero factor in? I thought the epa mpg tests were done on a dyno.

frayed

Ha!

Maybe I should do that. I have a circa 1984 GMT and a six year old sub. I know the new GMT is far nicer than my old one. Dunno on the sub. But I could stalk some timepiece forums.

neanicu

Thanks for the explanation Mike.

As I said before,I don't consider this a big deal at all...I'll take the flame throwing instead of MPG numbers

Nizer

Frayed, you are correct. I wasn't aware of this.

http://www.fueleconomy.gov/feg/how_tested.shtml

Also, I recall the test procedure was changed a few years back to make reported MPG numbers more representative of real world results. This is likely a contributing factor as well. Also, regarding final drive ratios, the numbers are 3.44 vs 3.97 if my source is correct, so about a 14% difference. This could be partially offset with differences in tire diameter, which I haven't checked yet.


Macca: You are on fire. Time to ease up on the Steinlager....

Serge944

I dunno what any of you guys are talking about - I rarely got any better than 10mpg in my 997.2 GT3...

neanicu

Macca,you are defending the car every chance you get,but that's ok...I've checked you...I know you don't work for Porsche Just kidding...
Bottom line,I think each side has their good and bad arguments and if kept civilized,a constructive discussion can be the end result.

Dude-

Low MPG due to shooting flames out the ***. I'll take it.

Nick

Curious. I have yet to see a 991GT3 with the painted silver wheel option or the black.