997 GT3 not flying straight
01-08-2017, 02:49 PM
#1
Instructor
Thread Starter
997 GT3 not flying straight
Just noticed that when I accelerate hard the car feels to dig in slightly on the left rear. Tyre pressures are bang on and the shocks are fine. Any ideas ? Diff maybe ?? FYI this is a gen 1 997 GT3 that has recently seen more track work than road work last year.
01-08-2017, 02:51 PM
#2
Rennlist Member
get your alignment/geo checked. could be toe off. also are your tires worn evenly?
could be diff, but I would check these other things FIRST.
could be diff, but I would check these other things FIRST.
01-09-2017, 10:33 PM
#5
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Excellent suggestions from all. OP, if the alignment/geometry checks out fine by a good shop that know these cars and no fastener are loose, then I'd suggest replacing the rear thrust arms(aka compression links). Even 0.5mm of play at the thrust arm bearing will result in throttle torque steer.
__________________
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
01-11-2017, 09:02 AM
#6
Instructor
Thread Starter
Thanks for the responses gent's. I will look in to it but the geo was done recently. Quick question, would changing the wheels back from my summer OZ lighter setup to the standard winter rims have any effect on the geo ?