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Now that the reviews are out, there are a few technical aspects of the suspension that were a surprise (at least to me). *Info taken from the Savage Geese review.
It has the front subframe and the body-in-white, from the front bulkhead forward, is from a 991 Carrera 4 to strengthen the car for the front axle lift; however, I wonder if that isn't to help with the shock tower strength due to the higher spring rates, which are double that of the standard GT4 at 100N/mm front (+ 55N/mm over GT4) and 140N/mm rear (+60N/mm over the GT4)
It offers more camber, toe and caster adjustment (maybe from the use of Club Sport components?) It features a revised adjustable rear axle tie rod for more toe adjustment, with revised front and rear control arms, ball joint bearings and shim packs.
Now that the reviews are out, there are a few technical aspects of the suspension that were a surprise (at least to me). *Info taken from the Savage Geese review.
It has the front subframe and the body-in-white, from the front bulkhead forward, is from a 991 Carrera 4 to strengthen the car for the front axle lift; however, I wonder if that isn't to help with the shock tower strength due to the higher spring rates, which are double that of the standard GT4 at 100N/mm front (+ 55N/mm over GT4) and 140N/mm rear (+60N/mm over the GT4)
It offers more camber, toe and caster adjustment (maybe from the use of Club Sport components?) It features a revised adjustable rear axle tie rod for more toe adjustment, with revised front and rear control arms, ball joint bearings and shim packs.
Wider track front and rear (by 6mm F&R)
Stiffer engine and transmission mounts
I see they are now using a 360 Caster Adjustable Thrust Arm Bushing... if that picture above is from a GT4 RS
All good suspension adjustments. Should dial out the rear end wiggle the GT4 experiences under hard braking. They updated brake bias as well, sending more braking power up front and revised ABS settings.
Any idea what was done to make the track wider front and rear?
From the SavageGeese video it sounded like the front 991 C4 body section is wider and therefore all the pick up points are moved out.
Frunk capacity is reduced to 125 litres from 150 in the casual 718 GT4/Spyder.
Just like in the 991 GT3.. which used the same front section.
For the rear - seems like just increasing the out of the box neg camber would give you that increased track?, also now facilitated by the revised length toe arm/link.
The Savage Geese video had quite a few interesting diagrams that looked like were taken from a Porsche technical presentation on the GT4RS... Anyone have a full pdf copy of that slide deck? I'd like to see what else might have been in there...
A few screen caps of the slides I'm talking about:
^Porsche should just make that content publicly available. Unique brand where there are lots of enthusiasts who care about the details. Instead of media availability only.
^Porsche should just make that content publicly available. Unique brand where there are lots of enthusiasts who care about the details. Instead of media availability only.
03-22-2022, 06:25 AM
