Please in this series give exact numbers when there will be data about camber and alignment. (thank you!) Btw sad the camber limit is -2,0 in the GT4RS. Also some peopel have shaking rear end of the car when you brake really hard from high speed. (Same with the Spyder RS)
Thanks for the comment. We do reserve our exact numbers for our customers who either purchase setup sheets from ourselves or who purchase our products and qualify for free setup sheets. We do put a large amount of free information out though via our videos but mainly our articles on our website all tailored towards providing the information required to develop your setup and settings for your driving style, tyres and use of the car.
Great video. So what is the max spring rate the GT4 shocks can control? I see some kits are 60nm, 70nm or 80nm front (all 96-101nm rear). I would thing that going 60nm or 70nm front would be fine without upsetting the shock and causing more understeer. What about spring length? The RS looks to have a shorter front spring with a helper
Thanks! 🙏 we found 90 at the front and 120 at the rear to begin to overwhelm the oem GT4 dampers and give uncontrollable rebound. With regards to spring length, they are much shorter but they also have different shocks and a very long nose lift control module that takes up a lot of shock length to consider.
How are you making the determination for total rear negative camber? Is there a formula for rear camber in relation to the total amount of front camber? ( IE ) -3.0 front -2.5 rear?
The value for the GT4 and GT4RS is based on data collection and the Professional driver feedback who we use to develop our settings. Interestingly even though the data suggested we didn't need to increase camber further, both professional drivers wanted a little bit more to improve the balance of the chassis and the grip distribution, so we increased further to get the balance perfect. This is the key reason why we always use both data analysis and pro drivers to get the perfect setup.
Hi, as shown on the video the exhaust system runs in the rear wheel arch only a few inches from the inside of the rear wheels directly on their centre line. If you watch some of our previous videos on our GT4 where we have the live temperature sensors you will see the red strip of heat always present on the tyres where the exhaust constantly heats the rubber on the inner strip 👍
Absolutely right 👍 we have referenced this in a previous comment but it’s one oversight whilst filming on a busy track day 👍 harder than it looks 😂 as always we strive to improve 🙏
That’s right! And apologies we sometimes get a bit mixed up, especially when at track with lots going on at the same time 👍 hopefully you enjoyed the 99% accurate info 🙌 and as always we strive to make our next video even better
Larger brake discs have a direct correlation to having more braking force. The braking force is torque and the equation for torque is force multiplied by radius. Therefore, for the same given caliper force, the brakes with the larger radius would generate the largest amount of braking torque to slow the wheel down.
@@SuspensionSecrets Sorry but this is completely irrelevant. The GT4 is easily capable of locking it's brakes. Bigger brakes allow more heat soak but they don't add actual braking performance to the GT4RS over the GT4.
@@blindobserverhi, yes that is true that a larger surface area of pad dissipates the heat more efficiently therefore keeping brake temps lower, but both things exist at the same time. We can’t write off the foundation formula for braking torque as irrelevant just because they also help to keep braking temps low as well. In fact improving heat soak only improves the braking torque equation further as it keeps the “Force” higher as fade is reduced. Therefore improved heat soak increases consistent “Force” and the diameter increase increases “Radius” which are the two factors for the torque equation. Therefore braking torque increases.
@ with a re-calibrated ABS system, higher velocity and increased traction via the tyres, you achieve increased braking force. Significantly increased engine power means increased top speeds which means an increased momentum to slow down which requires increased braking force to do so in the same period of time 👍 Just for reference we have never locked the brakes on our GT4 on track or the roads.
Sorry to hear you’re not enjoying the videos as much anymore. Please do let us know what you would like to see as we appreciate any feedback on the videos 👍
Very informative video!
Thank you 🙏
Good video!
Track width increase via a 12mm (mk5 golf gti) spacer still the same principal?
Luckily not, that did used to be the method but was definitely a cost saving excersize. Its no achieved with suspension arms, hubs and wheels 👍
Please in this series give exact numbers when there will be data about camber and alignment. (thank you!)
Btw sad the camber limit is -2,0 in the GT4RS.
Also some peopel have shaking rear end of the car when you brake really hard from high speed. (Same with the Spyder RS)
Thanks for the comment. We do reserve our exact numbers for our customers who either purchase setup sheets from ourselves or who purchase our products and qualify for free setup sheets. We do put a large amount of free information out though via our videos but mainly our articles on our website all tailored towards providing the information required to develop your setup and settings for your driving style, tyres and use of the car.
@@SuspensionSecrets secrets stay secrets. great video title. useless video.
Great video. So what is the max spring rate the GT4 shocks can control? I see some kits are 60nm, 70nm or 80nm front (all 96-101nm rear). I would thing that going 60nm or 70nm front would be fine without upsetting the shock and causing more understeer. What about spring length? The RS looks to have a shorter front spring with a helper
Thanks! 🙏 we found 90 at the front and 120 at the rear to begin to overwhelm the oem GT4 dampers and give uncontrollable rebound.
With regards to spring length, they are much shorter but they also have different shocks and a very long nose lift control module that takes up a lot of shock length to consider.
Will you are you developing suspension upgrades specifically for the 4RS? Looking forward to seeing those =)
Yes indeed! We have the full circuit kinematics kit complete for the car now 👍
@SuspensionSecrets I see it on your website now 👍
How are you making the determination for total rear negative camber?
Is there a formula for rear camber in relation to the total amount of front camber? ( IE ) -3.0 front -2.5 rear?
The value for the GT4 and GT4RS is based on data collection and the Professional driver feedback who we use to develop our settings. Interestingly even though the data suggested we didn't need to increase camber further, both professional drivers wanted a little bit more to improve the balance of the chassis and the grip distribution, so we increased further to get the balance perfect. This is the key reason why we always use both data analysis and pro drivers to get the perfect setup.
How can the exhaust heat transfer to the tyre tread…not sure on that one tbh. Interesting vid though thanks 👍🏼
Hi, as shown on the video the exhaust system runs in the rear wheel arch only a few inches from the inside of the rear wheels directly on their centre line.
If you watch some of our previous videos on our GT4 where we have the live temperature sensors you will see the red strip of heat always present on the tyres where the exhaust constantly heats the rubber on the inner strip 👍
30mm lower figure is in comparison with standard Cayman, not GT4. Both GT4 and 4RS have the same ride height from factory.
Absolutely right 👍 we have referenced this in a previous comment but it’s one oversight whilst filming on a busy track day 👍 harder than it looks 😂 as always we strive to improve 🙏
The 718 GT4RS isn't 30mm lower than the 718 GT4, they are the same ride height from the factory. Both are 30mm lower than a regular 718 Cayman.
Yeah I noticed that but then he said 13 mm and 10 mm lower
That’s right! And apologies we sometimes get a bit mixed up, especially when at track with lots going on at the same time 👍 hopefully you enjoyed the 99% accurate info 🙌 and as always we strive to make our next video even better
Centre lock comments didn't age well 👀😬
Very true!
Having a bigger brake disc does not correlate to having much more braking force.
Larger brake discs have a direct correlation to having more braking force. The braking force is torque and the equation for torque is force multiplied by radius. Therefore, for the same given caliper force, the brakes with the larger radius would generate the largest amount of braking torque to slow the wheel down.
@@SuspensionSecrets Sorry but this is completely irrelevant. The GT4 is easily capable of locking it's brakes. Bigger brakes allow more heat soak but they don't add actual braking performance to the GT4RS over the GT4.
@@blindobserverhi, yes that is true that a larger surface area of pad dissipates the heat more efficiently therefore keeping brake temps lower, but both things exist at the same time. We can’t write off the foundation formula for braking torque as irrelevant just because they also help to keep braking temps low as well. In fact improving heat soak only improves the braking torque equation further as it keeps the “Force” higher as fade is reduced.
Therefore improved heat soak increases consistent “Force” and the diameter increase increases “Radius” which are the two factors for the torque equation. Therefore braking torque increases.
@@SuspensionSecrets You are missing the point.
What do you gain from "increasing the brake force" when the wheels are already locked?
@ with a re-calibrated ABS system, higher velocity and increased traction via the tyres, you achieve increased braking force. Significantly increased engine power means increased top speeds which means an increased momentum to slow down which requires increased braking force to do so in the same period of time 👍
Just for reference we have never locked the brakes on our GT4 on track or the roads.
Knowledge base is getting annoying and does not provide much confidence. Shame as I thought they knew their business.
Sorry to hear you’re not enjoying the videos as much anymore. Please do let us know what you would like to see as we appreciate any feedback on the videos 👍