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How to fix the 718 RS wheels bouncing?

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Old 03-31-2024, 02:13 AM
  #76  
Drifting
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Originally Posted by fxz
Before spending in expensive wheels think (if you ever played volley or soccer) that a lighter ball bounce more...and OEM wheels are not heavy
actually 21" GT3 rear wheels are heavier,
i guess its all about hi/lo speed rebound settings

Question for experts is how a strut can be stressed (if any stress) by a 3/4 ways suspension , before cracking alà 991 RS....

maybe in this light a mag wheel real benefit is to let us play more with a strut suspension settings?
I suggest you watch the engineering explained video I linked on this thread before you finalize your thoughts on lighter vs heavier wheels.

Besides this issue you’ve described, please tell us about your Spyder RS.

We would all love to read an overall review of your time so far with your SRS!
Old 03-31-2024, 08:17 AM
  #77  
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Originally Posted by KelvinC
I do not have the weights for the mag wheels. But for the aluminum ones (assuming GT4 RS and Spyder RS wheels produced by SAI are the same):

Front: 20x8.5 et 61
Rear: 20.11 et 50

Front: 20.5 lbs
Rear: 23.75 lbs
These values (including Mg wheel weights) are from Silver Rocket's thread - https://rennlist.com/forums/718-gts-4-0-gt4-gt4rs-spyder-25th-anniversary/1362606-silverrocket-gt4-rs-upgrade-track-setup-for-fastest-lap-time.html



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Old 03-31-2024, 08:24 AM
  #78  
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Originally Posted by IanY
These values (including Mg wheel weights) are from Silver Rocket's thread - https://rennlist.com/forums/718-gts-4-0-gt4-gt4rs-spyder-25th-anniversary/1362606-silverrocket-gt4-rs-upgrade-track-setup-for-fastest-lap-time.html


Aren't OEM forged? That seems to be very little weight difference between OEM and OZ forged
Old 03-31-2024, 09:49 AM
  #79  
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Del

Last edited by fxz; 03-31-2024 at 09:50 AM.
Old 03-31-2024, 10:05 AM
  #80  
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The idea that a car like this, with this suspension technology and at this price point, would “need” or would be “improved” by an expenditure of some $20k on either factory magnesium wheels or some large amount for aftermarket magnesium wheels is preposterous. If the car doesn’t grip the road around turns on “uneven” pavement the way a Boxster GTS or even a BMW 330i does, then it’s a flawed setup from the factory; and I say that as someone who has one on order. The suspension on RS is fully adjustable, so maybe the answer lies therein.
Old 03-31-2024, 10:10 AM
  #81  
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Originally Posted by 348SStb
The idea that a car like this, with this suspension technology and at this price point, would “need” or would be “improved” by an expenditure of some $20k on either factory magnesium wheels or some large amount for aftermarket magnesium wheels is preposterous. If the car doesn’t grip the road around turns on “uneven” pavement the way a Boxster GTS or even a BMW 330i does, then it’s a flawed setup from the factory; and I say that as someone who has one on order. The suspension on RS is fully adjustable, so maybe the answer lies therein.
Fully agree, Porsche can always sugarcoat it with "especial" or the "last analog men's car" and it will be fine...

Last edited by 7184RS; 03-31-2024 at 11:29 AM.
Old 03-31-2024, 11:03 AM
  #82  
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Honestly, you guys are making a big deal out of something that's not really a problem, as proven by the multiple comparisons of on track times vs GT3s and GT3rs of multiple eras, along with other make/model comparisons. Like all cars, there's always room for improvement and or simple modifications, especially for improved tire life (increased camber). But the idea you need to rip out the suspension and replace everything, is ridiculous.
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Old 03-31-2024, 11:21 AM
  #83  
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Originally Posted by Ksdaoski
Honestly, you guys are making a big deal out of something that's not really a problem, as proven by the multiple comparisons of on track times vs GT3s and GT3rs of multiple eras, along with other make/model comparisons. Like all cars, there's always room for improvement and or simple modifications, especially for improved tire life (increased camber). But the idea you need to rip out the suspension and replace everything, is ridiculous.
Agreed, but what do you think of the complaint as worded in Post #1?
Old 03-31-2024, 11:54 AM
  #84  
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Originally Posted by 348SStb
Agreed, but what do you think of the complaint as worded in Post #1?
Well you don't have to look too far above my post to see people referencing needing dramatic changes to make it a car to live with which I think is overblown and a ridiculous take. For the OP I believe he has a Spyder which AP has acknowledged as a softer spring setup than the GT4 RS. I don't have experience with the spider RS. I think it's silly for people to come in and give advice and recommendations when they've never experienced the car. That being said if you're buying an RS based Porsche there are expectations that it won't be as daily driver livable as the base models. I do think temperature is a big player in suspension and tire complacency. When there are cooler temperatures your tires are going to behave much differently. I wouldn't have the same set of expectations at 40° versus 80° whether on track or on the road.

Last edited by Ksdaoski; 03-31-2024 at 12:09 PM.
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Old 03-31-2024, 01:11 PM
  #85  
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I will make a video of the car loosing grip for 1second after a large bump that i take much faster with the GT3 touring without any issue , in the meantime haven't read if this car let you play with hi/lo speed rebound settings or not, don't take it too seriously, I would rebuy the SRS again and again, 4RS for track is crazy at it's price point/old tech after 992 GT3 came out but this is another story, not for this thread. nor my problem

Last edited by fxz; 03-31-2024 at 01:21 PM.
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Old 03-31-2024, 01:13 PM
  #86  
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Originally Posted by fxz
I will make a video of the car loosing grip for 1second after a large bump that i take much faster with the GT3 touring without any issue , in the meantime haven't read if this car let you play with hi/lo speed rebound settings or not, don't take it too seriously, I would rebuy the SRS again, 4RS for track is crazy at it's price point/old tech after 992 GT3 came out but this is another story, not for this thread. nor my problem
Thank you. Can you tell us where you are located?
Old 03-31-2024, 01:25 PM
  #87  
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I've seen several similar discussions regarding the dynamics and limitations of the strut suspension on the 981/718 cars, and I think there seems to be some confusion between the capabilities of the car and just issues with driver confidence.

You can't argue the platform is certainly capable of very fast lap times, especially in the hands of a professional driver. Seems that on smooth roads and courses, where the suspension is mostly just dealing with weight transfer duties, it's pretty much a non issue, save for some tail wag on hard braking. But for many people (myself included) any uneven pavement mid-corner makes the car feel unsettled and you really second guess the capabilities of the car.

My first track day ever was with my stock GT4, on a bumpy track, and I was pretty terrified hitting those bumps at speed. Meanwhile other 981/718 drivers seemed to be unphased! I did the normal toe link/alignment/tire mods and while the instability is reduced, it's certainly still present.

I just kept at it, and now even when I feel the rear end bounce around, I'm able to continually get faster as I gain more trust the car.
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Old 03-31-2024, 02:02 PM
  #88  
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Look at the fawning adulations towards and insane prices paid for pre-multilink (993?) air-cooled 911s. If their wheels bounce, that would be deemed "analog character". I have other cars with wishbones and multi-links. They scary me way more than the 4RS in mid-corner bumps.


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Old 03-31-2024, 02:47 PM
  #89  
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Originally Posted by 348SStb
The idea that a car like this, with this suspension technology and at this price point, would “need” or would be “improved” by an expenditure of some $20k on either factory magnesium wheels or some large amount for aftermarket magnesium wheels is preposterous. If the car doesn’t grip the road around turns on “uneven” pavement the way a Boxster GTS or even a BMW 330i does, then it’s a flawed setup from the factory; and I say that as someone who has one on order. The suspension on RS is fully adjustable, so maybe the answer lies therein.
Oh but the car does need about $20k or more to ameliorate is suspension shortcomings. And yes you can have a better experience for less money - an issue that the 4RS and its owners are going to have to deal with for a long long time before the day when 'collectors' appreciate the effort here...
Old 03-31-2024, 02:53 PM
  #90  
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Originally Posted by dnimi123
Oh but the car does need about $20k or more to ameliorate is suspension shortcomings.
No, no it does not.
Seriously, you're a broken record, spewing bad information.
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