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Correct me if I'm wrong, but I thought the turbo requires minimum 98 Octane fuel….,
Depends on what octane rating system you’re using. Here in North America Porsche only requires 91, but it’s a different system of measurement than what is used in Europe.
Flushed the brake with Castrol SRF to get ready for the track season. When I bought the car 4+ years ago it had Ate Super Blue in it that had been in there for years. After 4 years and probably 12 quarts of brake fluid run through the fluid coming out finally isn't looking green anymore...
The last time I checked fuel economy on my 996 Turbos was.... never?
I do notice I can burn through a tank of fuel astonishingly quickly when on the track though!
Engines are pumps; the more efficient we can make them turn, the better the run.
Did a lot of efficiency work back at the turn of the century, developed some IP around it - kind of stuck with me, and when you consider we don't hammer the throttle 90% of the time, pretty chuffed with myself for pulling this off.
Also nice on those long highway runs at a constant speed.
So I had a chance this morning to do my 60 mile mileage loop with varying terrain - a couple of bridges, a tunnel, a large hill south, and the same hill northbound. I find that this loop, at a constant 62/3 mph gives a fairly approximate number on mixed use driving. Obviously, it is better over a longer run as the fuel trims will average out in a neater fashion, but I was very surprised to see a peak of 28mpg, and a settled average of 27.7mpg.
If memory serves, this is 3.5mpg better than my previous best of 24.2mpg (I'll try and dig up the numbers to confirm), but either way, this is a solid improvement over the 22mpg quoted from the factory.
I attribute this improvement to both tuning and mechanical improvements in both thermal management and improved flow.
It makes me think that with the addition of the 980s, 30mpg at nominal cruise is not only possible, but we'll within reach.
On a personal note, this is a very hard exercise to complete when folks are passing you all the time and you just want to turbo their azzes...
Conditions were damp drizzle, 9c, octane 94.
You should back that up with a physical measurement, topping off tank, setting counter to zero, refill after drive and divide miles by gallons to be sure. I know my cars dash reading was way off from reality, but that was because I had larger fuel injectors, which the ECU does not take into account.
uncovered her from winter hibernation... trying to address the intermittent starter before i begin taking her out for the year... god i miss this car...
Couldn't disagree with you more. powdrhound has shown that they don't sap any power until over 700rwhp, assuming it's a good set of sport cats. So at that point, what are you gaining other than polluting the environment?
I've driven three exhausts now with them, OEM, 600 cell, 200 cell and 50 cell... This one, without them and no change to the tune, clearly has more torque off idle - I can idle up the little ramp into the garage, whereas the ti unit made me slip the clutch to get into the same garage.
The engine spins much more freely over the 200 cells that were just replaced with pipes.
And, it is a known fact that cars are not the problem, it's the cows we have to watch out for...
04-08-2023, 05:11 AM
