questions on '17+ PP Sach shocks
 

i'm currently running RCE Yellow springs on the non-PP stock shocks, can i install this same springs on a set of Sach shocks that come with PP? also what's so good about this Sach shocks? do they make your car more comfortable and handles better than the non-PP shocks?

I didn't like the Sachs shocks at all, the valving was messed up for anything other than dead flat roads.

I found them "crashy" and replaced the OEM coilover after a couple of thousand kilometres.

My MCA Street Performance coilovers are better everywhere IRT performance and comfort.

yes
dunno
dunno

I'm running the an 18 PP with the Sachs dampers and TRD's (Eibach Pro's). Just about the same drop as the Yellows, although the rear springs are progressive. No issues and I think it feels great. However, I haven't experienced any other setups so I don't have much to compare it with. I've never found any quantitative comparison between the stock and Sach's. I'm sure its out there somewhere. I'm curious about the differences also.

You mean the PP Sachs not the tS right?
I am going to fit the tS springs/shocks and from what I have read they are the same comfort wise with the OEM 17+ BRZ springs/shocks combo, am I wrong?

i honestly did not know the PP suspension and TS are different

tS Sachs should be better, but I hadn't found any lowering springs that are compatible...

Those springs they came with are more than enough and probably not far from the STI pinks, we'll see when I fit them

Why would you think they couldn't? The PP and non-PP come with the same springs from the factory, so factory PP and non-PP dampers can definitely be run with the same springs. If anything I might guess the Sachs dampers could be more compatible with stiffer/lower springs.

The definitely make the car feel more go-kart like. As mentioned above, more "crashy". IMO they have too much high-speed compression damping which seems maybe a bit gimmicky. But perhaps they offer better low-speed damping as well which again if anything would be more appropriate for stiffer/lower springs.

The PP Sachs dampers definitely make the car *less* comfortable. I test-drove PP and non-PP back-to-back an the non-PP is a smoother ride for sure. As for ultimate handling, I couldn't say for sure.

FWIW I'm running the factory PP Sachs dampers with Swift BRZ Sport springs which lowered the car 1.25" and are ~40% stiffer than stock. The car performs very well at the track and I don't get the sense that it is underdamped for these springs.

I had a ‘13 with stock suspension and then RCE yellows. Now I have a ‘17 PP. I prefer the ‘17 suspension to either of my prior setups for comfort and handling. I think if you search you’ll find previous comments from RCE that yellows will work fine on PP dampers. Not a very expensive experiment to try.

They're not lowered.

Some say tS is lowered by a tiny amount, bear in mind 215/40/18 are 1 cm taller than the standard BRZ 17" tires so probably tS IS lowered by 1 cm as the US pinks...

RCE Yellows work well on PP and non-PP shocks. The non-PP shocks are more comfortable.

- Andrew

I can vouch for Yellows paired with the Sachs.

Personally I don't mind that setup, though I did drive a stock 86 a few weeks ago in Japan on stock suspension and it was definitely "more comfortable."

But the difference is fairly negligible. It's not like the Yellows + Sachs combo is jarring compared to stock. Just a bit stiffer, and it obviously feels great while cornering.