718 GT4RS
09-28-2021, 02:13 PM
#2401
09-28-2021, 02:28 PM
#2403
09-29-2021, 12:48 AM
#2404
Race Director
Originally Posted by porsche964rs
991 Speedster? Is that not the 991.2 GT3 engine?
Originally Posted by raymort
Yep
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DK7 (09-29-2021)
09-29-2021, 05:34 PM
#2405
I know I'm late to the game here... but the Speedster wasn't just about being a GT3 for the road. It's also the only way to get a naturally aspirated convertible 911. They could have thrown out all the fancy Speedster and GT3 stuff and just stuck that motor in a standard 992 chassis and they'll sell every last one at whatever they want to charge for it.
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porscheflat6 (09-29-2021)
09-29-2021, 05:57 PM
#2406
09-29-2021, 06:25 PM
#2407
Race Director
Originally Posted by DK7
Do you know what other changes? Do have driven 991.2 GT3 engine vs. 991 Speedster or EU 991.3 RS engine in comparison...what your experiences?
Other who owned both cars are probably better judges of this.
The following 2 users liked this post by CAlexio:
DK7 (09-30-2021),
porscheflat6 (09-29-2021)
09-30-2021, 08:16 PM
#2409
I doubt the GT3 engine will be in the 4RS and even if it is that won’t make up for the rear suspension. Moreover, the Cayman as good as it is needs a ground up makeover.
Consider this - cars like the Miata and the Alpine have better suspension setup and geometry than the Cayman. Struts all round no longer cut it and on high speed rough payment are skittish.
09-30-2021, 08:26 PM
#2410
Rennlist Member
No, the rear suspension in the Cayman line is not up to it. I would go after a Mclaren 600LT - far more advanced than anything being proposed for the GT4RS.
I doubt the GT3 engine will be in the 4RS and even if it is that won’t make up for the rear suspension. Moreover, the Cayman as good as it is needs a ground up makeover.
Consider this - cars like the Miata and the Alpine have better suspension setup and geometry than the Cayman. Struts all round no longer cut it and on high speed rough payment are skittish.
I doubt the GT3 engine will be in the 4RS and even if it is that won’t make up for the rear suspension. Moreover, the Cayman as good as it is needs a ground up makeover.
Consider this - cars like the Miata and the Alpine have better suspension setup and geometry than the Cayman. Struts all round no longer cut it and on high speed rough payment are skittish.
09-30-2021, 11:03 PM
#2411
LOL - Of the brands in discussion, I own a 991.2 GT3 RS, a 720S and a Cayman GTS - so am speaking from a position of ownership. The problems with the rear suspension set up in the Cayman including the GT4 are well understood by those that use them on the track and in other forms of motorsport. Dropping in the noise box from the GT3 doesn't solve the suspension problems. On flat smooth tracks it will be fine but will be limited by the track and wheel tire choices - but on rough roads it won't be particularly good, moreso at high speed - it will simply become unsettled. None of this is a mystery to those that have pushed these cars in environments beyond the most benign tracks.
Last edited by groundhog; 09-30-2021 at 11:04 PM.
10-01-2021, 12:35 AM
#2412
Delete
Last edited by KelvinC; 10-01-2021 at 03:22 AM.
10-01-2021, 10:09 AM
#2413
Rennlist Member
LOL - Of the brands in discussion, I own a 991.2 GT3 RS, a 720S and a Cayman GTS - so am speaking from a position of ownership. The problems with the rear suspension set up in the Cayman including the GT4 are well understood by those that use them on the track and in other forms of motorsport. Dropping in the noise box from the GT3 doesn't solve the suspension problems. On flat smooth tracks it will be fine but will be limited by the track and wheel tire choices - but on rough roads it won't be particularly good, moreso at high speed - it will simply become unsettled. None of this is a mystery to those that have pushed these cars in environments beyond the most benign tracks.
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Snowy999 (10-03-2021)
10-01-2021, 10:25 AM
#2414
Burning Brakes
The 4.0 GT3 engines and the 4.0 GTS/GT4 engines share the exact same bore and stroke, despite being different engine families. So sharing some internals is certainly plausible.
10-01-2021, 03:58 PM
#2415
LOL - Of the brands in discussion, I own a 991.2 GT3 RS, a 720S and a Cayman GTS - so am speaking from a position of ownership. The problems with the rear suspension set up in the Cayman including the GT4 are well understood by those that use them on the track and in other forms of motorsport. Dropping in the noise box from the GT3 doesn't solve the suspension problems. On flat smooth tracks it will be fine but will be limited by the track and wheel tire choices - but on rough roads it won't be particularly good, moreso at high speed - it will simply become unsettled. None of this is a mystery to those that have pushed these cars in environments beyond the most benign tracks.