lisocayman

C.J. Ichiban

The strut itself might need more complicated valving to allow it to "vent" excess forces that would smash into the bump stops and therefore transfer into the chassis

Petevb

Higher spring rates likely help slightly, but maintaining ride height is a bigger factor imho.

CRex

And not taking kerbs aggressively on cold tires + low pressure...

meaker

Is this becoming a big problem?

MileHigh911

This was always my thinking too!!! I noticed that one of the Clubsports that went off at PIkes also had strut tower failure. What did they do to fix that so quick CJ?

CRex

That was impact damage, a completely different kettle of fish...

lisocayman

LexVan

Are there any parts that can be transferred from the Cup cars or the GT4 race cars to the GT3 to beef-up the tower area?

Petevb

Yes, but the street cars lack the structure they bolt to so it will be much less effective. Unclear to me if it's really a net positive.

Other threads on the issue, also from the GT4 board (which shares the same part):
https://rennlist.com/forums/gt4/9483...r-failure.html
https://rennlist.com/forums/991-gt3-...r-failure.html

The best prevention I can see is to a) maintain stock ride height, and b) use a "race weight" lightweight/ 3 piece wheel that will bend on impact to reduce the loads from an impact. The GT3 wheels are significantly stronger than the chassis.

If you were to change something in the suspension it'd be the shock and bump stop (with coilovers). You'd go for more travel and significantly stiffer bump/ jounce damping, especially at high speed. The part that's failing probably has a ~10x factor of safety over design corner weight, so it's rated for the better part of 10k lbs. You only see those types of loads when you run out of travel and metal effectively hits metal.