Manthey Upgrade Kit OEM Suspension - GT2 RS
#31
Sorry, so far just this to align the car properly. Next year I'll upgrade the shocks with the MR kit (to be sure warranty is still valid I'm not considering any other brand).
#33
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scottchuk (10-10-2022)
#34
#35
Yes, but that happens only at the Ring and only bellow 7:40m laps or so, lots of compressions and jumps that are only possible at the ring and only if running at a minimum certain pace.
On all other tracks, the car runs fine. No touching anywhere.
PS:: I think full mr suspension will fix that, I am at the Ring for a week, and going to check that.
All gt3rs non MR ring taxis have the same problem, I checked last time 3 of them... all the same.
On all other tracks, the car runs fine. No touching anywhere.
PS:: I think full mr suspension will fix that, I am at the Ring for a week, and going to check that.
All gt3rs non MR ring taxis have the same problem, I checked last time 3 of them... all the same.
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scottchuk (10-10-2022)
#37
#39
Adjustable caster bushings like the ones shown in pic below will fix this.
The OEM 2RS and 3RS only have the caster bushing hole in the middle.
As you add more shims for camber it causes the wheel to move forward.
Depending on how many shims added the forward movement can be up to 10mm closer rubbing the fender liner.
Having adjustable caster bushings will gain back the clearance.
However, I find the OEM RS metal caster bushing to be extremely difficult to remove. The non-RS rubber caster bushing is a lot easier to remove.
Also stiffer springs and dampers will reduce the rate of movement during compression travel.
The OEM 2RS and 3RS only have the caster bushing hole in the middle.
As you add more shims for camber it causes the wheel to move forward.
Depending on how many shims added the forward movement can be up to 10mm closer rubbing the fender liner.
Having adjustable caster bushings will gain back the clearance.
However, I find the OEM RS metal caster bushing to be extremely difficult to remove. The non-RS rubber caster bushing is a lot easier to remove.
Also stiffer springs and dampers will reduce the rate of movement during compression travel.
__________________
PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
PCA National Instructor
TPC Racing stats:
2023 Porsche Sprint Challenge 992 Cup Am Champion
2023 Porsche Sprint Challenge GT4 Pro-Am Team Champion
2022 Porsche Sprint Challenge 992 Cup & 991 Cup Champion
2020 IMSA GT3 Cup Challenge 2nd Championship
2018 IMSA GT3 Cup Challenge 2nd Championship
2016 IMSA GT3 Cup Challenge Champion
2013 IMSA GT3 Cup Challenge Champion
2006 Rolex-24 @ Daytona GT Champion
2004 Grand-Am SGS Class Champion
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pepinozaur (12-23-2022)
#40
Maybe this way it makes less change to the OEM caster angle and in that case the adjustable bushings could not be required can anyone confirm that ?
#41
Correct but MR usually invert the OEM top mounts to get more camber instead of using a lot of shims to the lower arms ( so the top of the wheel is more inwards )
Maybe this way it makes less change to the OEM caster angle and in that case the adjustable bushings could not be required can anyone confirm that ?
Maybe this way it makes less change to the OEM caster angle and in that case the adjustable bushings could not be required can anyone confirm that ?
#42
I had the first trackday with the upgrade and Cup 2R today.
Camber helps a lot but with the higher grip of the Cup 2R stock suspension starts to feel soft.
Cup 2R peak of grip lasted for around 35 min of track time, now I'd say it feels better that a Cup2 but best grip was gone fast.
Camber helps a lot but with the higher grip of the Cup 2R stock suspension starts to feel soft.
Cup 2R peak of grip lasted for around 35 min of track time, now I'd say it feels better that a Cup2 but best grip was gone fast.
Last edited by juanpablo046; 09-28-2022 at 02:29 PM.