Installed RS Wheels on my 991.2 GT3, also Porterfield R4-S Pads, Steering Wheel Trim - Page 2 - Rennlist - Porsche Discussion Forums

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Installed RS Wheels on my 991.2 GT3, also Porterfield R4-S Pads, Steering Wheel Trim

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Installed RS Wheels on my 991.2 GT3, also Porterfield R4-S Pads, Steering Wheel Trim

 
Old 12-21-2018, 12:57 AM
  #16  
thinkingmonkey
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That looks great! Well done

Anybody selling a set of RS wheels
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Old 12-21-2018, 01:00 AM
  #17  
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Looks great. Where did you get the RS wheels? I might do the same for my GT3.
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Old 12-21-2018, 02:12 AM
  #18  
dieselino
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Originally Posted by FourT6and2 View Post
Good info, thanks.

Do you have a photo from the rear, down low, so we can see how wide the rear tires look?
I can take some, not a huge difference to be honest.

Originally Posted by JC68 View Post
This looks great. Do you have stock alignment?
Yes I haven't changed alignment.

Originally Posted by aaa335 View Post
looks great! did you adjust the ride height at all?
No it's stock, but was thinking of raising the rear very slightly.

Originally Posted by KBS911 View Post
Very good news! Never thought of this. I'm trading my 16 RS for a 19 GT3. I have a brand new set of OEM RS wheels with recently mounted Cup 2 N2 tires. Might just keep them if this pans out. 325's in the rear and wider track up front can't be a bad thing....can it? Would love to hear more about pluses and minuses of this configuration. Will this be beneficial on the track? Thanks for posting!!
You will have to get different tires for the rear. Don't think stock RS wheels size will fit. Rolling OD is an inch larger .

Originally Posted by CTK View Post
Looks great. Where did you get the RS wheels? I might do the same for my GT3.
Bought them from a guy who had a brand new set of take offs from his RS .
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Old 12-21-2018, 02:13 AM
  #19  
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I think I just raised the value of stock RS wheels lol
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Old 12-21-2018, 04:12 AM
  #20  
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Comparison between rear wheel/tire sizes (GT3 with OE tire vs GT3RS with OE tire).



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Old 12-21-2018, 11:50 AM
  #21  
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So the rolling diameter changes with the RS wheel...not good
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Old 12-21-2018, 12:41 PM
  #22  
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No rubbing? Have you driven the vehicle hard or aggressive? Thats insane for 325's in the rear without rubbing on 21's!
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Old 12-21-2018, 01:01 PM
  #23  
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Originally Posted by KINGSRULE View Post
So the rolling diameter changes with the RS wheel...not good
As mentioned in another thread, it also changes the overall rake of the car with that setup (20"/21" as RS's are setup on) as opposed to 20" front and rear on the non-RS GT3's.
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Old 12-21-2018, 01:44 PM
  #24  
dieselino
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Originally Posted by KINGSRULE View Post
So the rolling diameter changes with the RS wheel...not good
Please read my post, I did not change the rolling diameter. RS tire size is 325 30 21, I went 325 25 21.

Originally Posted by PTeezy View Post
No rubbing? Have you driven the vehicle hard or aggressive? Thats insane for 325's in the rear without rubbing on 21's!
Once again the rolling diameter remains the same, the fact that they are 21s doesnt mean anything . The extra width isn't an issue . Many people have been running 325s on their cars .

Originally Posted by redmonkey928 View Post
As mentioned in another thread, it also changes the overall rake of the car with that setup (20"/21" as RS's are setup on) as opposed to 20" front and rear on the non-RS GT3's.
Rake does not change, please read the post. Rolling diameter is the same as stock GT3, not RS . I didn't use RS tire sizes. 21s don't change anything since I went down an aspect ratio with the tire .
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Old 12-21-2018, 01:45 PM
  #25  
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Originally Posted by FourT6and2 View Post
Comparison between rear wheel/tire sizes (GT3 with OE tire vs GT3RS with OE tire).



This info is not applicable here, you have the wrong tire size . I used 325 25 21.
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Old 12-21-2018, 01:53 PM
  #26  
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Originally Posted by dieselino View Post
This info is not applicable here, you have the wrong tire size . I used 325 25 21.

If it helps, here is data for PS 4S in that size (big improvement over 30-series):
Attached Images
File Type: pdf
4s 325 25 21.pdf (17.9 KB, 35 views)
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Old 12-21-2018, 02:14 PM
  #27  
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Originally Posted by dieselino View Post
This info is not applicable here, you have the wrong tire size . I used 325 25 21.
100% applicable. I know you used different tire sizes, which is why I specifically said the data is for OE sizes for people to compare.

Here is the same data for 325/25/21 tire.



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Old 12-21-2018, 02:31 PM
  #28  
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Originally Posted by dieselino View Post
Well when I first asked the question if RS wheels fit on a GT3, I got a lot of flack for it and no real answers. I ended up calling Wheels Boutique to see what type of offsets and width they have run for customers cars to get a better answer. Long story short, they are many out there running much more aggressive setups, if anyone is wondering, they fit perfectly fine. No rubbing and they look amazing on the GT3. Front and rear wheels are 1/2 wider on the RS and Offsets are slightly different. This equates to the RS wheels being out 11mm further on the front and 1mm further inboard. On the rear they are out 5mm further, and 7mm further inboard over the standard GT3. The front wheels look so much better and sit much more flush than the factory GT3 wheels. I always felt the stock GT3 wheels looked buried in the front. If I didnt want to stagger the rear wheels, at the minimum I would highly recommend just using an RS wheel upfront. Makes the front wheels sit like the rear wheels do. Pretty much every car I have owned I have put 10mm spacers on to make the car sit better, including my R8 and BMW M2. The key is to keep rolling diameter the same. I am running 255/35/20 up front and 325/25/21 on the rear. Wheels are wrapped in Michelin Pilot Sport 4s which is a much better tire for the street over the sport cup 2.

I ordered the car with standard silver wheels, those wheels will be used for the Track, so I am not worried about performance changes on the street since it will be so minor. Car doesnt feel any different with new wheels on, except tires have way more grip since its below 40 degrees in Michigan. I also changed out my factory pads for Porterfield R4-S pads. Only drove 50miles on the stock pads and I was amazed by how much they squeal and the crazy amount of brake dust! So far so good on the Porterfield Pads, initial bite feels good and no squealing at all. Will see how brake dust differs but so far I am very happy with them for a street pad. If I dont like the pads, best part is they were under $400 shipped. Plan is to get different pads for the track after I do a little more research.

Last thing is changed was the steering wheel trim in the spoke. I actually like the silver inserts from the GTS so I replaced them instead of the black. Feels a little more upscale to me while still feeling sporty. Completely subjective but I like it Relatively easy mod and was only $60. Thinking of possibly doing the carbon surround from the Weissach Package.







looks fantastic! is your car chalk or is it a PTS color? really like it!
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Old 12-21-2018, 02:41 PM
  #29  
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Originally Posted by FourT6and2 View Post
100% applicable. I know you used different tire sizes, which is why I specifically said the data is for OE sizes for people to compare.

Here is the same data for 325/25/21 tire.



This equates to what I said in the thread, 11mm further out on the front, 1mm further in. 5mm further out on the rear, and 7mm further in. 1/2 wider is a 12mm difference.
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Old 12-21-2018, 02:51 PM
  #30  
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Does the narrower GT3 with RS wheels have the same "footprint" as the RS to make this worthwhile ?
I assume the wide-body RS maximizes the tire size due to width of its "foot print"
Correct ?
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