In the corners, I'm sure it's (the GT3) not faster (than the GT4).
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Depends on the corner.
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kfmcmahon (08-12-2019)
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He used the words "kind and reliable" to describe the GT4.
Sounds boring.
The GT4 needed gearing and power to reach the level of fun it deserved. I just don't think they got there with the 718.
Sounds boring.
The GT4 needed gearing and power to reach the level of fun it deserved. I just don't think they got there with the 718.
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rosenbergendo (08-12-2019)
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Didn't mention my GT4 had the TPC toe links, swift springs and I had most of that understeer tuned out of the suspension. I'm running the stock setup on the GT3 at this point and it doesn't like to turn in quite like the GT4 but that's a minor quibble on my part.
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It's not faster - they are the same.
Engine placement in 911 is red herring, a distraction. It's not like the whole assembly is shifted 2-3 feet back in 911 compared to Cayman or a Ferrari 488, for example - it's just swapped 180 degrees with the engine going in place of gearbox and gearbox going where the engine was. It shifts maybe 2%-3% of weight around only. When Porsche moved the engine to the middle in the 911 RSR race car, the weight shift was between 1% and 2% only (https://www.roadandtrack.com/car-cul...rsche-911-rsr/), and they did it for the aero rather than for weight distribution. Also, to those who keep talking about "polar momentum of inertia" or whatever they call it - a cornering car pivots around its rear axle and not around the center between two axles (that would require rear wheels steering in the direction opposite to the front wheels by the same amount), so getting weight close to the geometric center of the car is not that beneficial. There are other issues with it - like it's challenging to make rear aero effective, and suspension packaging is a challenge too, but that's a different school of fish.
Cayman has a limitation in its rear suspension design which makes it put power down less effectively in some conditions. But it's not a huge deal either.
So ultimately, even for most proficient drivers here, weight distribution of 911 or even suspension design of Cayman are made up problems.
So ultimately they would have about the same mid-corner speed, given the same tires.
Engine placement in 911 is red herring, a distraction. It's not like the whole assembly is shifted 2-3 feet back in 911 compared to Cayman or a Ferrari 488, for example - it's just swapped 180 degrees with the engine going in place of gearbox and gearbox going where the engine was. It shifts maybe 2%-3% of weight around only. When Porsche moved the engine to the middle in the 911 RSR race car, the weight shift was between 1% and 2% only (https://www.roadandtrack.com/car-cul...rsche-911-rsr/), and they did it for the aero rather than for weight distribution. Also, to those who keep talking about "polar momentum of inertia" or whatever they call it - a cornering car pivots around its rear axle and not around the center between two axles (that would require rear wheels steering in the direction opposite to the front wheels by the same amount), so getting weight close to the geometric center of the car is not that beneficial. There are other issues with it - like it's challenging to make rear aero effective, and suspension packaging is a challenge too, but that's a different school of fish.
Cayman has a limitation in its rear suspension design which makes it put power down less effectively in some conditions. But it's not a huge deal either.
So ultimately, even for most proficient drivers here, weight distribution of 911 or even suspension design of Cayman are made up problems.
So ultimately they would have about the same mid-corner speed, given the same tires.
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Depends on the driver
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Agree with max. If there is any advantage, it's only realized with the real pro drivers. I didn't feel there was an advantage when I owned both at one time. The real advantage that the cayman has is the lower power. If you're trying to learn how to go faster, less power is always better and then transition to a faster car. I do it to a larger degree now between spec miata and the RS. Every Time I got faster in the GT4 I got faster in the GT3. Every time I get faster in my spec miata, it translates to a faster time in my RS.
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I think the strut rear suspension of the GT4 and the wheel/tire size stagger (front/rear) in the GT4 is revealed as a weakness on track fairly easily by a relatively quick driver (but maybe a more skilled driver than I can drive around it better).