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GT4RS - Track Setup

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Old 11-19-2022, 04:34 PM
  #16  
usctrojanGT3
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Originally Posted by lovetoturn
Its 100Nm in front and 140Nm in the rear.

With a 60/80 Nm setup on my car moving the rear bar by just a hole on one side makes a noticeable change in the handling. It is nice to be able to make just one simple adjustment to be able to fine tune the car's handling to your personal liking.
What are the spring rates for the Swift spring upgrade for the GT4 in Nm?

Last edited by usctrojanGT3; 11-19-2022 at 04:38 PM.
Old 11-19-2022, 09:22 PM
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Originally Posted by lovetoturn
Its 100Nm in front and 140Nm in the rear.
This is correct.




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Old 11-19-2022, 10:16 PM
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Originally Posted by dnimi123
whoa whoa whoa... hang on there have been multiple threads already and 'people' (me) getting lambasted for daring to suggest that Pcars let along the GT4RS need any adjustments or mods at all. They are so well engineered and tested that noone should have to do anything at all to the cars whatsoever under all conditions! Of course Im joking but I do find it funny that this forum will go after some people for complaining about the limitations of these cars and then go right on posting about what they are going to do or mod on the car next. Rant over. Carry on...
I am keeping the car stock, no mods required. Alignment and setup using stock parts that came with the car to make it more suited to the tracks I am driving. If it were road only i wouldn't change a thing. So yet again, you are incorrect and choose to opine on something you haven't driven.
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Old 11-19-2022, 10:24 PM
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Based on a mix between suspension secrets and a manthey setup sheet I have made the following changes, will report back after Bathurst.

Front - 2.5* camber with 1mm toe in.

Rear - 2* camber with 2mm toe in.

ARB's, middle front, stiff rear.


I haven't played with heights and rake yet (aside from a corner balance with drivers weight in).
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Old 11-19-2022, 10:36 PM
  #20  
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Originally Posted by cafe_racer
I am keeping the car stock, no mods required. Alignment and setup using stock parts that came with the car to make it more suited to the tracks I am driving. If it were road only i wouldn't change a thing. So yet again, you are incorrect and choose to opine on something you haven't driven.
This was a general not specific rant about the apparent hypocrisy relating to the majority of posts on this forum discussing modifications to Pcars that needs no modifications according to some authorities.
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Old 11-19-2022, 10:54 PM
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Originally Posted by cafe_racer
Based on a mix between suspension secrets and a manthey setup sheet I have made the following changes, will report back after Bathurst.

Front - 2.5* camber with 1mm toe in.

Rear - 2* camber with 2mm toe in.

ARB's, middle front, stiff rear.


I haven't played with heights and rake yet (aside from a corner balance with drivers weight in).
I like it but let me know if you go -2.8 (0 toe) front and -2.5 rear (2 in ).
Old 11-20-2022, 02:13 AM
  #22  
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Originally Posted by usctrojanGT3
What are the spring rates for the Swift spring upgrade for the GT4 in Nm?
80F 100R. I have them on the 981 and just replaced with 100/120 Bilstein springs; I'll see how that goes at Bathurst.
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Old 11-20-2022, 07:37 PM
  #23  
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Originally Posted by Martini racer
I like it but let me know if you go -2.8 (0 toe) front and -2.5 rear (2 in ).

This sound like the setup I plan to use on mine......you will need the rear toe links for that rear camber.
Old 11-20-2022, 07:46 PM
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Originally Posted by jmartpr
This sound like the setup I plan to use on mine......you will need the rear toe links for that rear camber.
is that confirmed? … as 4RS comes with different length toe links than casual GT4.
Old 11-20-2022, 07:54 PM
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Originally Posted by TDT
is that confirmed? … as 4RS comes with different length toe links than casual GT4.
ExMB already check this...the OEM on the 4rs are just 5 mm longer. You will run out of toe adjustment at -2 deg camber
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Old 11-21-2022, 10:17 AM
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I was not present during alingment but I do trust my tech. And he was able to align just by adding shims to the factory control arms;
front : -3 camber (+1 mm toe) and rear: -2.5 (+2 mm)

this is a pic of the fronts at full lock. No rubbing but not much clearance with factory wheel/tyre setup. Rears are fine.
Wondering if using 991 cup camber plates for alignment would allow for a 265 wide tyre without issues?

Old 11-21-2022, 10:21 AM
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Also, can anybody confirm that our pad sizes are exactly the same as 992 GT3? Wanna buy aftermarket pads: PFC11 or DS3.12...
Old 11-21-2022, 10:26 AM
  #28  
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Originally Posted by Jevi Javi
I was not present during alingment but I do trust my tech. And he was able to align just by adding shims to the factory control arms;
front : -3 camber (+1 mm toe) and rear: -2.5 (+2 mm)

this is a pic of the fronts at full lock. No rubbing but not much clearance with factory wheel/tyre setup. Rears are fine.
Wondering if using 991 cup camber plates for alignment would allow for a 265 wide tyre without issues?

You will need more toe on the rear....the front also need to bring that caster back closer to OEM. When the suspension travels it will rub or hit the edge of the fender.
Based on what other with 4RS have done the 991 camber plates work. They add camber and correct the caster....much better than just adding shims.
Lowering the car can also add camber.

check the post from Ehresmann:

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Old 11-21-2022, 10:42 AM
  #29  
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Originally Posted by Warwick Morris
plus a track log book you can fill in so that the next guy you sell to can see that you lied about it never having been on the race track.
hahaha
Old 11-21-2022, 04:54 PM
  #30  
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Originally Posted by Jevi Javi
Also, can anybody confirm that our pad sizes are exactly the same as 992 GT3? Wanna buy aftermarket pads: PFC11 or DS3.12...
Iron Pad shapes are the same (981/718 GT4 & GT4RS, 991 GT3/RS & 992 GT3)
Ferodo DS3.12 - FCP4664G
PFC 11 - 1773.11.17.44
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