GT4 RS breaks cover then...

GT4 RS breaks cover then...

Author
Discussion

P. ONeill

1,455 posts

53 months

Wednesday 10th May 2023
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What differences, if any, are there between the PDK gearbox in the 4RS and Spyder RS and the standard PDK box in the GTS?

Twinfan

10,125 posts

105 months

Wednesday 10th May 2023
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P. ONeill said:
What differences, if any, are there between the PDK gearbox in the 4RS and Spyder RS and the standard PDK box in the GTS?
Massively shorter gearing for a start, and full on GT spec speed-of-light changes.

TDT

4,952 posts

120 months

Wednesday 10th May 2023
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Gear ratios from 991.2 3RS… acting on a 20inch wheel instead of 21inch… making it the shortest geared GT car ever at time of launch.
I think 992 3RS has just taken that back though or might be equal again… as they did change the final ratio for that also.

Edited by TDT on Wednesday 10th May 19:08

rkwm1

1,477 posts

103 months

Thursday 11th May 2023
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Took mine out for a 150 mile run yesterday, on a mix of A and B roads and in mixed weather conditions.

Very special car. Going to interesting to see if the Spyder sounds as good!















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Edited by rkwm1 on Thursday 11th May 07:26

isaldiri

18,720 posts

169 months

Thursday 11th May 2023
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TDT][url said:
Didn't realise this. Wonder why the 4rs running the fixed locking ratio limited slip diff rather than the full fancy electro/hydraulic multi ratio one from the gt3? The latter unit has always been the one used with the dual clutch while the fixed one was used with the manual.....

TDT

4,952 posts

120 months

Thursday 11th May 2023
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Yep, Mechanical Locking diff from the manual 991.2 GT3

The fancy fully variable e-diff from PDK GT3 won’t fit.
Or rather… they decided to not make it fit.

Twinfan

10,125 posts

105 months

Thursday 11th May 2023
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Another indication of slight sandbagging on the GT4RS along with the same width tyres as the GT4/Spyder, slightly lower BHP etc?

Porsche, the masters of marketing and product placement, doing what they do best smile

Taffy66

5,964 posts

103 months

Thursday 11th May 2023
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Twinfan said:
Another indication of slight sandbagging on the GT4RS along with the same width tyres as the GT4/Spyder, slightly lower BHP etc?

Porsche, the masters of marketing and product placement, doing what they do best smile
^
This

RacerMike

4,225 posts

212 months

Thursday 11th May 2023
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Twinfan said:
Another indication of slight sandbagging on the GT4RS along with the same width tyres as the GT4/Spyder, slightly lower BHP etc?

Porsche, the masters of marketing and product placement, doing what they do best smile
Well. The platform is hamstrung by its rear suspension, so fitting the diff isn’t ultimately what will make the difference. Ideally the car needed multi-link rear suspension. Then it really would be a threat to the the 3RS.

Twinfan

10,125 posts

105 months

Thursday 11th May 2023
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Oh for sure, it all adds up though doesn't it?

rkwm1

1,477 posts

103 months

Thursday 11th May 2023
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For sure, they could have made it more technically advanced and faster, but i'm very happy with what they have built. Its brilliant!

Twinfan

10,125 posts

105 months

Thursday 11th May 2023
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I like the fact it's so different to the regular GT4 - they really are chalk and cheese rather than being a GT4 'plus'.

Initially I thought I'd want one more and more as time went on, but in fact the opposite has happened. As I said yesterday on another thread it's great that Porsche built it so that the lucky few have the choice of having one!

Taffy66

5,964 posts

103 months

Thursday 11th May 2023
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It feels very different from the 718GT4 from a driving POV. I have a Manual 718GT4 CS as well which is a truly fantastic car in its own right with possibly the best Manual change in the business. The 718GT4 also seems to have an abundance of torque from low to mid-range compared to the 4RS although my 4RS seems to be very tight still.
Over 5k revs the 4RS comes into its own. The noise the 4RS makes sends goose pimples down your spine whereas a stock GT4 sounds very quiet in comparison. As a road only car, I think the GT4 is better as It's a lot more refined in both ride quality and noise obviously. The GT4's sublime Manual gearbox gives it a layer of interaction no PDK can hope to match no matter how brilliant it is.
On balance, I'd prefer if my 4RS had the same Manual as the GT4 albeit with the same low ratios as the 4RS.

johnny senna

4,046 posts

273 months

Thursday 11th May 2023
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If Porsche did put the fancy rear suspension and diff on the GT4RS, would it be faster than the GT3RS? Assuming power to weight was the same?

TDT

4,952 posts

120 months

Thursday 11th May 2023
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Probably would be course specific. On tight courses with not many high speed corners... maybe?
But generally would still not be as quick over and long also with lots of high speed corners or say an N'Ring lap, as 992 3RS - but might be a bit closer to 992 GT3.

With a multilink rear it would be somewhere between 991.2 GT3 and the 991.2 GT3 RS.

911s still has much fatter rubber front + rear for more mechanical grip and engine over the rear wheels for massive grip out of corners.

Edited by TDT on Thursday 11th May 12:29

TDT

4,952 posts

120 months

Thursday 11th May 2023
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Twinfan said:
I like the fact it's so different to the regular GT4 - they really are chalk and cheese rather than being a GT4 'plus'.

Initially I thought I'd want one more and more as time went on, but in fact the opposite has happened. As I said yesterday on another thread it's great that Porsche built it so that the lucky few have the choice of having one!
Taffy66 said:
It feels very different from the 718GT4 from a driving POV. I have a Manual 718GT4 CS as well which is a truly fantastic car in its own right with possibly the best Manual change in the business. The 718GT4 also seems to have an abundance of torque from low to mid-range compared to the 4RS although my 4RS seems to be very tight still.
Over 5k revs the 4RS comes into its own. The noise the 4RS makes sends goose pimples down your spine whereas a stock GT4 sounds very quiet in comparison. As a road only car, I think the GT4 is better as It's a lot more refined in both ride quality and noise obviously. The GT4's sublime Manual gearbox gives it a layer of interaction no PDK can hope to match no matter how brilliant it is.
On balance, I'd prefer if my 4RS had the same Manual as the GT4 albeit with the same low ratios as the 4RS.
For me - i think the 4RS is very cool - and is the perfect culmination of a journey for the platform.
I have the 4RS covered from a chassis perspective - but it really is the drivetrain that makes the difference.

If i could spec one now - I'd try to get it in the new Vanaduim Grey Metallic Spyder RS launch colour - Perfect.

Taffy66

5,964 posts

103 months

Thursday 11th May 2023
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johnny senna said:
If Porsche did put the fancy rear suspension and diff on the GT4RS, would it be faster than the GT3RS? Assuming power to weight was the same?
The 4RS is quicker in a straight line over a certain speed but the 3RS is much much faster going around any corner due to extra grip.

Taffy66

5,964 posts

103 months

Thursday 11th May 2023
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I spoke to a guy at Oulton who had recently returned from a track day at the Ring. He had a new 3RS in front for a while and his GT4 RS was pulling on it on the long straights but the 3RS was much faster on the corners. In fact, the 3RS had so much grip the driver hardly touched the brakes as it just had more and more grip the faster it went around the corners.

johnny senna

4,046 posts

273 months

Thursday 11th May 2023
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I’m not sure the GT3RS sounds much fun with all that grip. I think I’d take the 4RS TBH.

TDT

4,952 posts

120 months

Thursday 11th May 2023
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johnny senna said:
I’m not sure the GT3RS sounds much fun with all that grip. I think I’d take the 4RS TBH.
That is really a key difference between the 911 and Cayster platforms ... one is ruthlessly fast, with high limits, the other isn't quite as fast, but is more fun and accessible.