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991 Cup Car Suspension Overview and GT3 Comparison

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Old 09-17-2014, 07:46 PM
  #16  
GrantG
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Originally Posted by hfm
Page 14 of their parts list has race only parts for the GT3:

http://www.pfcbrakes.com/Repository/...ide_PN_cat.pdf.
I think that applies to the 996 GT3.
Old 09-17-2014, 08:04 PM
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TRAKCAR
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So what bolts right over to tighten the GT3 up?
Are we sure the GT3 has Brembo? I thought PFC all around?
Old 09-17-2014, 08:20 PM
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Nizer
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Lot's of room to close the gap between GT3 and Cup. Looking forward to seeing how far they take the RS.
Old 09-17-2014, 11:34 PM
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Spyerx
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Originally Posted by TRAKCAR
So what bolts right over to tighten the GT3 up?
Are we sure the GT3 has Brembo? I thought PFC all around?
Street cars are brembo. Cup cars are pfc. Wonder if mounting and spacing is same on street parts?

Front is almost identical to 997. Wow rear is different. How is camber adjusted in rear ? On 997 we had puck and trailing link.

Wonder if that cup solid link could replace the 4ws control thing.... For those that might want to try it. Curious on that rear upright too to allow for 18" wheels....


I'm sure Someone will experiment soon
Old 09-18-2014, 12:31 AM
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rockitman
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Fascinating read. Thank you. Nice to see the gt3 suspension w/o wheels. It will be a while until I get the equip to do the center locks, remove the wheels and check things out myself.
Old 09-18-2014, 12:31 AM
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Excellent, informative article - thank you for posting.
Old 09-18-2014, 01:24 AM
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Very imformative!
Thanks Bart....
It's great to see this comparison - you guys rock
Old 09-18-2014, 04:10 AM
  #23  
Zulu Alpha
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Bart, I think you really do know how to make my day better!
Old 09-18-2014, 04:43 AM
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Great read, very informative. Thanks for taking the time to post all the info and pics up.
Old 09-18-2014, 10:13 AM
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GTEE3
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Bart, thx for your review!
do you have any suspension ideas/upgrades in process for 991GT3 track work?
I would be interested.
Old 09-18-2014, 02:16 PM
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Elephant Bart
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Originally Posted by Spyerx
Street cars are brembo. Cup cars are pfc. Wonder if mounting and spacing is same on street parts?

Front is almost identical to 997. Wow rear is different. How is camber adjusted in rear ? On 997 we had puck and trailing link.

Wonder if that cup solid link could replace the 4ws control thing.... For those that might want to try it. Curious on that rear upright too to allow for 18" wheels....


I'm sure Someone will experiment soon

It appears that the uprights are the same with some modifications done to the Cup car (some mounting brackets are machined down) but I'm assuming the mounting points are the same. I would be interesting to see if Cup car PFC brakes could be directly bolted onto the GT3.

The rear camber is adjusted via eccentric adjuster bolt and the arms are length adjustable.





The Cup cars rear lower control arms are mounted higher and the lower brackets on the upright are machined down. This allows for 18" wheel fitment.

Also, I think there would be no problem replacing the rws actuator with a toe arm from regular carrera or possibly the cup car.

Originally Posted by TRAKCAR
So what bolts right over to tighten the GT3 up?
Are we sure the GT3 has Brembo? I thought PFC all around?
The brakes are Brembos for sure.



Originally Posted by GTEE3
Bart, thx for your review!
do you have any suspension ideas/upgrades in process for 991GT3 track work?
I would be interested.
We do have spherical bearings for all locations on the GT3 and the Carrera which will improve suspension precision and feedback.

http://www.elephantracing.com/suspen...n-bearings.htm
Old 09-18-2014, 03:03 PM
  #27  
Zulu Alpha
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Originally Posted by Elephant Bart
I would be interesting to see if Cup car PFC brakes could be directly bolted onto the GT3.


Also, I think there would be no problem replacing the rws actuator with a toe arm from regular carrera or possibly the cup car.

That's the few thousand dollar question regarding the breaks. Would be awesome to install the Cup Car's PFC breaks.


Did you see a disconnect port (plug) for the cable on the actuator itself? If you want to switch it out with a cup car toe link.
Old 09-18-2014, 03:52 PM
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Fascinating stuff. Thanks very much!
Old 09-18-2014, 04:25 PM
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TRAKCAR
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Thanks for this thread, much appreciated.
No RWS, light weight battery, 18", side muffler delete, this thread has legs...
Awesome.
Old 09-18-2014, 06:20 PM
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GrantG
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Originally Posted by Zulu Alpha
Would be awesome to install the Cup Car's PFC breaks.
Not sure you really want to do that. I doubt the performance is that different (with same piston count and rotor dimensions). I think one desirable trait one might like to borrow from the Cup's brakes & suspension is the ability to run 18" wheels, but that looks to be impossible from Bart's post (seems the Rear Wheel Steering and its geometry prevents that).

If I were to consider upgrading the brakes, it would likely be Movit carbon or similar.


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