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SilverRocket Racing is on a mission to become the NO.1 supplier of performance upgrades for the Porsche 718 Cayman GT4RS. Since welcoming our very first GT4RS Clubsport in 2021 and the inaugural GT4RS Street car, our journey with the GT4RS has spanned over three years. Our involvement in multiple racing events, operating a full fleet of GT4RS Clubsport race cars, has allowed us to gather extensive on-track data and gain invaluable experience with this remarkable vehicle. Leveraging this wealth of racing-derived knowledge, we are now dedicated to enhancing the performance of GT4RS Street Cars. Our goal is to unlock the full potential of these vehicles, applying our track-tested insights to elevate your driving experience to new heights.
As a long-standing member of Rennlist and the newly appointed Product Manager at SilverRocket Racing, I am excited to present an executive summary here on Rennlist. This summary will comprehensively list all SilverRocket products currently available and those in the development pipeline for the 718 Cayman GT4RS. Additionally, I'll be sharing photos of customer GT4RS vehicles equipped with our SilverRocket products. Our primary aim with this post is to simplify the process for Rennlist members to discover and select the right SilverRocket products for your GT4RS. We are eager to hear your feedback on our existing lineup and any suggestions for products you'd like to see developed. Please feel free to respond directly here, send me a private message, or reach out via WhatsApp with your thoughts and ideas.
----------------------------------------------SR GT4RS Products in Developing---------------------------------------------- --Aerodynamic:
-------------------:1. SR Rear Flat Floor Exhaust Cover with enhanced Diffuser Blades (Developing Stage: Prototyping)
-------------------:2. SR Rear AeroDisks for 718 GT4RS OEM Magnesium Rims (Developing Stage: Prototyping )
-------------------:3. SR Front High-Downforce Splitter (Developing Stage: Prototyping)
--Comfort:
-------------------:1. SR 3D Air-Cooled Porous Seat Insert for Porsche LWB (Developing Stage: Releasing to Production, Estimated Release Date: Mid June )
-------------------:2. SR 3D Forced Helmet Air-Cooled Kit (Developing Stage: Car connection end done, helmet connecting parts in prototyping, Estimated Release Date: Mid July )
--Track Performance:
-------------------:1. SR Fuchs Classic Magnesium Rims (Developing Stage: Prototype done, waiting for TUV testing, Estimated Release Date: Mid Aug)
-------------------:2. SR DRY CARBON FIBER Rear Hatch Door (Developing Stage: Prototype testing done, waiting for alpha version pre-production samples,Estimated Release Date: Late July)
-------------------:3. SR Lightweight Polycarbonate Hatch Door Glass (Developing Stage: Prototype testing done, waiting for alpha version pre-production samples, Estimated Release Date: Late July)
-------------------:4. SR DRY CARBON FIBER Super Lightweight Front Hood (Developing Stage: Prototyping, Estimated Release Date: Early July)
-------------------:5. SR DRY CARBON FIBER Super Lightweight Doors (Developing Stage: Design Stage. Estimated Release Date: Late Aug)
-------------------:6. SR Racing Spec enhanced Brake&Chassis kit for 18inch full-slick tires. (Developing Stage: Prototype done, On-Track Testing in process,Estimated Release Date: Late Aug)
--Track Safety
-------------------:1. SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit (Developing Stage: Prototype testing installation Done, Release to Final Production. Estimated Release Date: Mid June )
-------------------:2. SR DRY CARBON FIBER Roll Cage (FIA 253 Safety Standard) (Developing Stage: Released to Final Production. Estimated Release Date: Mid June )
SR DRY CARBON FIBER Roll Cage (FIA 253 Safety Standard) Design File SR DRY CARBON FIBER Roll Cage, CAE result to FIA 253 Safety Standard. SR DRY CARBON FIBER Roll Cage, CAE result to FIA 253 Safety Standard. SR DRY CARBON FIBER Roll Cage, Harness Bar CAE Result to FIA 253 Safety Standard.
If you are interested in seeing any prototype of our new products in developing, we will be happy to share them here.
SilverRocket Fuchs Classic Magnesium Rim Design Concept. SilverRocket Fuchs Classic Magnesium Rim prototype (Waiting for testing in TUV lab) SR 3D Forced Helmet Air-Cooled Kit, Car Connecting End. SR 3D Forced Helmet Air-Cooled Kit, Car Connecting End. SR 3D Forced Helmet Air-Cooled Kit, Car Connecting End. SR 3D Forced Helmet Air-Cooled Kit testing in SilverRocket GT4RS Clubsport
SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit 3D Design File SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit 3D Design File SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit - 3D Prototype SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit - First Prototype. SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit - First Prototype.
SR Dura&light Cayman Clubsport Roll Cage Reinforced Anchor Kit - Why we chose 7075 AL as final production material.
__________________ - Alex Li
Racer, 2nd&3rd Place of GT4 Category@Porsche Sprint Challenge Asia 2018~2023/@Porsche Carrera Cup Asia 2021.
Product Manager& On-Track Tester@SilverRocket Racing, Asia's leading Porsche Race Team & Performance Kit Developer for Porsche GT4RS.
Follow us on Instagram: silverocket718 to stay updated on latest SR products in development.
You have a lot of options, almost too many options. Would be nice to get a clear understanding of the complete package and the changes to downforce relative to stock. Right now it's really hard to understand with the various combinations and when you show percent changes versus stock because you can't just add them all up for a clear understanding, since the parts should work together.
Example, Package A, consisting of this front lip and these canards and this wing and these wing risers, result in 500lbs of downforce at 120mph vs stock at 250lbs of down for at 120mph.
Something to that effect. Otherwise I feel like I'm just kind of picking and choosing and guessing on the best possible combination of all the items that you offer, and I don't necessarily understand how they work together the best.
I do appreciate that you're making the effort to come up with GT4 RS focused parts, that's great!
Edit: I see 5 different canard and dive plane options. 4 different spoiler options; 5 if you include the ducktail option. That's too many options for me to figure out!
You have a lot of options, almost too many options. Would be nice to get a clear understanding of the complete package and the changes to downforce relative to stock. Right now it's really hard to understand with the various combinations and when you show percent changes versus stock because you can't just add them all up for a clear understanding, since the parts should work together.
Example, Package A, consisting of this front lip and these canards and this wing and these wing risers, result in 500lbs of downforce at 120mph vs stock at 250lbs of down for at 120mph.
Something to that effect. Otherwise I feel like I'm just kind of picking and choosing and guessing on the best possible combination of all the items that you offer, and I don't necessarily understand how they work together the best.
I do appreciate that you're making the effort to come up with GT4 RS focused parts, that's great!
Edit: I see 5 different canard and dive plane options. 4 different spoiler options; 5 if you include the ducktail option. That's too many options for me to figure out!
The reason why we developed so many options comes from our bad habit as a pro race team. We always prefer to have as many small front aero parts as possible, which makes us easier to adjust our Aero Balance during the track testings or time attack events. While this approach can lead to confusion and difficulty in decision-making, your observation is valued.
Creating an Aero pack to simplify the selection process for our customers is a logical step. I will commence work on this initiative tomorrow. Stay tuned for updates.
Yes, I like all of your options and agree that some more specifics on downforce would help. Real world values would be most helpful as numbers coming off of a CFD analysis and not being corellated to that can be over exaggerated. Also a simple gurney flap for the stock wing would be fantastic and I think would sell well. One with 3-4% of the cord length or 9-12 mm tall could add about 15% more downforce to the rear wing that starts at about 300 pounds at 300kph, which would make about 45 pounds of additional downforce. Nobody has made one yet for the 4RS.
Another question. Do you know what the OEM aero balance for an GT4 RS. The GT4 was stated to be 20/80 and the 992 GT3 RS is stated to be 30/70. So with what they did to the 4RS I would suspect it would be somewhere between the 20/80 and 25/75. I am going to go out on a limb and call it roughly 23/77.
Last edited by lovetoturn; 05-14-2024 at 11:52 PM.
Here are some number for everyone to use as a starting point for the aero on our cars. I have already done this homework, so this appears a good place to let out of the box. Please correct me if I am off base on anything SR.
As per Porsche the car has normal 138 and sport 220 pounds of downforce at 125 mph, so that translates into 305 and 488 pounds of downforce at 300 kph or 186 mph. That being the most universal speed at which to report maximum downforce. So for high downforce settings:
If at 20/80 balance there is 98 front and 390 rear.
If at 25/75 balance there is 122 front and 366
If at 23/73 balance then there is 112 front and 376 rear. (My estimate for these calculations)
The rear diffuser is 81 pounds of the rear downforce for the GT4 and the same parts for the 4RS so the rear wing on the 4RS (376-81) has 295 pounds of downforce in the highest setting.
The lower setting on the 4RS has 305 pounds of downforce, which at 23/73 balance is 70 front and 235 rear. Minus the 81 for the diffuser the rear wing in low setting has 154 pounds of downforce.
Therefore there is a (295-154) 141 pound difference between the low and high downforce settings of the wing. There are three holes for adjustment on the rear wing for three total settings of high-medium-low. Therefore there is 70.5 pounds between each setting of the rear wing. 70 more pounds more downforce just by moving it up or down about 3mm. Pretty amazing. Lets just call it (155 - 225 - 295) for L-M-H.
So lets look at the front too. There are 4 settings on the front air spats so a total of 3 changes to cover an increase in downforce from 70 to 112. This equates to a difference of 42 pounds of downforce divided by the 3 or 14 pounds for each change. So (70 - 84 - 98 - 112).
The Manthey CF rear spoiler is advertised to add 4% or about 25 pounds of downforce to the rear of the car so the SR one should be similar.
From the GT4 Clubsport manual, adding 5mm of rake adds 1.1% (5 lbs) total downforce and 1.6% (8 lbs) more of that in front. Adding 10mm more rake adds 1.9% (10 lbs) total downforce and 3.8% (19 lbs) more of that to the front. These are Clubsport numbers with a bigger wing and riding lower, but the 4RS should be similar numbers but a bit smaller. This is how Manthey balances their GT4 packages.
The Silver Rocket front canard and spoiler extension adds a stated 17% to the front downforce of the car. I am going to assume that is in high downforce mode of 112 pounds, so 17% of that would be about 19 pounds of additional downforce.
In all of my research it appeared that a well designed gurney flap added about 15% more downforce to a wing of our general stature when tested in the wind tunnel. So 295 times 15% is roughly 45 pounds of additional downforce.
Raising the wing into cleaner air 3 inches adds almost 30 pounds from extrapolating what others have stated in the past about the GT4 wings.
So for example, we need to add roughly 23 pounds in the front for every 77 we add in the back to maintain aero balance or about a 1.0 to 3.3 ratio. Having said that you will need to test any aero changes on the fastest corner of your track and see how the car feels. Which axle lets go first,or do they go together? Hopefully the latter if the mechanical and aero grip are in harmony.`
So maybe we add the SR front canards and spoiler extensions for 19 pounds. Then we add the SR wing height extensions and the rear spoiler for 75 (30 + 45) pounds more downforce in the rear. Total upgrade is 19+75 = 94 pounds and it is roughly balanced. If needed add touch more rake and it is spot on.
So to summarize the aero for the GT4 RS
FRONT: 70 - 84 - 98 - 112
REAR WING: 155 - 225 - 295
Rear Diffuser: 81 - 81 - 81
Last edited by lovetoturn; 05-15-2024 at 01:05 AM.
I think the car can get away with just adding a bit more front front aero though it seems talking to these 3rd party people. stage one maybe just the small boot spoiler, the 3" risers and the front smaller cannards and lower splitter part. they have 2 sized cannards, the Pro I guess you then need the bigger rear wing.
But I think they should sell kits, stage 1, 2 and 3. So we know we are buying a balanced or working kit, over just buying one part.
I think it would be nice to fit two smaller canards on the front like Manthey and SST due. Your single part is of course a better version on the clubsports. Can these parts be made of plastic to match the other parts on our cars. Something like what SSR has done that integrates into the airfoil of the stock car would be nice. No holes to drill and a very OEM type look for all of us non racers. This type of canard would continue the upslope underneath of the airfoil, yet not block airflow through the air foil, and the deeper part outside and in front of the airfoil would also start to form some vortices down the side of the car. A good set of double canards like this could generate 40-45 pounds of downforce, which would allow you to add about 3.3 times that or 130 to 150 pounds in the rear to balance the car.
Last edited by lovetoturn; 05-16-2024 at 03:06 PM.
Any idea on what the CF cage will set us back? That really has my attention... I told myself I was done modifying my car and then that shows up...
Originally Posted by lovetoturn
Yes it is nice, but expensive, more of a package deal in general. SR lets you peace meal together what ever you want at better price points.
I'll not hijack this thread but SSR will sell the splitter separately and it isn't all that expensive in the Porsche performance parts world. I know lots of people rocking SR parts and would have no problem having them on my car, I just wanted to go in a different direction w.r.t. my splitter.
05-13-2024, 04:34 AM
SilverRocket GT4RS Products& Prototypes (Input needed))
I told myself I was done modifying my car and then that shows up...