FogCitySF

The .2 RS has stiffer springs with helpers and the strut towers are identical to the .1 GT3/RS. So long as is kept to rates no higher than those, would think the risk of damage is low. For a little bit more reinforcement (though likely very marginal) can use the cup car strut reinforcement plates.

JCviggen

If anything it becomes less likely as the higher spring rate makes it harder to bottom out onto the bump stops. Just don't lower the front too much. Both extra ride height or spring rate will help avoid tower damage.

flyjets

Seth

keep me in mind when you have the details on the new suspension.

Ian

Zaskar1972

Bringing back an old thread. Does anyone know the acceptable spring rates for 991.2 GT3. I am going back to my OEM shocks and thinking or running 100 and 160 (approx 560 and 896 in/lbs) with my DSC.

Dave

marcus1982

Also if someone can kindly share the PN of the .2RS springs and the plate that needs to be replaced so springs can be used on a .1 GT3 and keep the same ride height.

Thanks.

Cay_PI

.2 RS springs....

marcus1982

So, let's end the mystery.
The .2 RS parts:

Rear springs set: 991 333 531 70 504
Front main spring set: 991 343 531 71 504
Front helper spring: 991 333 537 70
Intermediary ring between the springs: 991 333 511 71
Rear helper spring is the same as .1 GT3

Not sure about what the"federteller" refers to, but the red top mounts(the red rings) have the same PN as the .1 GT3. My best guess is the white Teflon looking ring in the picture shared above on an RS setup.

RDM2418

Does anyone know if I could put GT2 RS struts/springs on a 991.1 GT3 - both cars with FAL? If so, would I need any other parts? Is this a bad idea?

Andi

I imagine this setup would be underdamped if you didn't also upgrade the shocks.

RDM2418

I thought the shocks and springs come together as one unit? Do you think they’d be a direct swap?

74goldtarga

Just get a set of springs from Tarret or BBi - They're like $1000 which seems pretty cheap for a solution that's already been worked out for the 991 GT3 to increase the spring rate. If you are going to do the swap you still need a quality balance and alignment. Unless you have a high-quality alignment rig and know how to do this yourself (unlikely) you are going to need help. Ideally you have a shop with local track or racing experience with the 991 platform that can help you match your springs to your setup.

RDM2418

Thank you. Solid advice.

Cay_PI

Should be the sames as 991.2 GT3 RS? In this case, it fits and works well. See above.