Newly release GT4 and Boxster Spyder with 4.0 engine
06-18-2019, 11:56 AM
#91
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I think Porsche was a little embarrassed when a well driven 991.2 Manual GT3 posted pretty much the same laptimes as their PDK version. So with the PDK version of the GT4, they'll be able to show significantly better times (though much of it will be from the over 10% higher torque peak, once they remove the ECU limiter)...
I could notice the extra 2-3% power (from less drive train loss ) when I drove a manual .2 GT3, and I’m sure the lower weight of a manual .2 GT3 also helped keep the track times similar to the PDK .2 GT3.
06-18-2019, 12:01 PM
#92
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https://www.motortrend.com/cars/pors...t-test-review/
06-18-2019, 12:11 PM
#94
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06-18-2019, 12:51 PM
#95
Burning Brakes
I expect a PDK-only, RS version at end of the GT4 cycle with modest increase in hp/torque for 125K, from moderate tweaks to this same 718 engine. Likely 440 hp, 320 torque. This GT4RS will be a fun car for GT4/mid-engine fans but maintain the overall Porsche model heirarchy.
However, by then a .1 GT3 will beat the new GT4RS price, beat the GT4RS torque/hp, and still have 5 years of engine warranty.
Meanwhile a two year old .2 GT3 will be very tempting on price compared to a brand new GT4RS, offer both PDK/manual, and have noticeably more torque/hp from a true race engine.
However, by then a .1 GT3 will beat the new GT4RS price, beat the GT4RS torque/hp, and still have 5 years of engine warranty.
Meanwhile a two year old .2 GT3 will be very tempting on price compared to a brand new GT4RS, offer both PDK/manual, and have noticeably more torque/hp from a true race engine.
06-18-2019, 12:54 PM
#96
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06-18-2019, 01:06 PM
#97
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I'd be happy to place a healthy wager that the 718 GT4RS will not come with 340 torque or more from the factory
06-18-2019, 01:11 PM
#98
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Given how miserly Porsche is with torque increases, (991.2 RS only gained 7 ft lbs of torque over .1), I am 1000% confident that your number is unrealistic. No offense. I highly doubt the GT4RS torque would even eclipse the 991.1 GT3.
I'd be happy to place a healthy wager that the 718 RS will not come with 340 torque or more from the factory
I'd be happy to place a healthy wager that the 718 RS will not come with 340 torque or more from the factory
The RS's torque is only 7 ft-lbs higher than the GT3 not because they are being miserly. It's because that is the natural limit for the technology (given the compression ratio, tuning for crappy pump fuel, exhaust that complies with emissions and noise standards, and high revving nature where peak torque is at 6,250 rpm).
Torque is very much proportional to displacement in an NA motor. You have to work hard to make much more (or much less) than the typical ratio of Ft-Lbs per Liter. It's not like HP where you can just rev higher to make more power. You're limited by how much energy the fuel can yield on each combustion.
So, because the non-RS GT4 already has 13:1 compression and makes its torque peak 1,000 rpm lower than the GT3 RS (less parasitic losses from spinning so fast) there is every reason it could/should make GT3 levels of torque (or even more if compression ratio gets a bump).
06-18-2019, 01:16 PM
#99
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OK, I'll bet a beer (can we say 339 ft-lbs or more though - same as .2 GT3?)
The RS's torque is only 7 ft-lbs of torque higher than the GT3 not because they are being miserly. It's because that is the natural limit for the technology (given the compression ratio, tuning for crappy pump fuel, exhaust that complies with emissions and noise standards, and high revving nature where peak torque is at 6,250 rpm).
Torque is very much proportional to displacement in an NA motor. You have to work hard to make much more (or much less) than the typical ratio of Ft-Lbs per Liter. It's not like HP where you can just rev higher to make more power.
So, because the non-RS GT4 already has 13:1 compression and makes its torque peak 1,000 rpm lower than the GT3 RS (less parasitic losses from spinning so fast) there is every reason it could/should make GT3 levels of torque (or even more if compression ratio gets a bump).
The RS's torque is only 7 ft-lbs of torque higher than the GT3 not because they are being miserly. It's because that is the natural limit for the technology (given the compression ratio, tuning for crappy pump fuel, exhaust that complies with emissions and noise standards, and high revving nature where peak torque is at 6,250 rpm).
Torque is very much proportional to displacement in an NA motor. You have to work hard to make much more (or much less) than the typical ratio of Ft-Lbs per Liter. It's not like HP where you can just rev higher to make more power.
So, because the non-RS GT4 already has 13:1 compression and makes its torque peak 1,000 rpm lower than the GT3 RS (less parasitic losses from spinning so fast) there is every reason it could/should make GT3 levels of torque (or even more if compression ratio gets a bump).
How about a nice bottle of wine? I owe you if the 718 GT4RS is 339 ft lbs or higher, and you owe me if the GT4RS is less than 339 torque?
06-18-2019, 01:20 PM
#100
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06-18-2019, 01:26 PM
#102
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06-18-2019, 01:29 PM
#103
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Cool. Looking forward to the RS announcement.
How long do you think GT4 production will run? When do you think the GT4RS will be announced?
It's unclear to me how they will handle the duration/numbers of GT4 production, particularly the RS part, as they've never done it before with two cars.
How long do you think GT4 production will run? When do you think the GT4RS will be announced?
It's unclear to me how they will handle the duration/numbers of GT4 production, particularly the RS part, as they've never done it before with two cars.
06-18-2019, 01:51 PM
#104
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RS not until 2021/22 at the earliest. Regular GT4 PDK available June 2020.
In the meantime a limited edition Boxster 25th Anniversary with 450hp will be released in the same colour scheme as the original prototype - Silver/Red Leather/Copper coloured wheels.
In the meantime a limited edition Boxster 25th Anniversary with 450hp will be released in the same colour scheme as the original prototype - Silver/Red Leather/Copper coloured wheels.
