questions on '17+ PP Sach shocks

[stlgrym3]

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?

[86MLR]

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.

[strat61caster]

yes
dunno
dunno

[pogofx]

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.

[JIM THEO]

Originally Posted by 86MLR

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.

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?

[stlgrym3]

Originally Posted by JIM THEO

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

[gpvecchi]

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

[JIM THEO]

Originally Posted by gpvecchi

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

[ZDan]

Originally Posted by stlgrym3

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?

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.

also what's so good about this Sach shocks?

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.

do they make your car more comfortable and handles better than the non-PP shocks?

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.

[TofuJoe]

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.

[gpvecchi]

Originally Posted by JIM THEO

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

They're not lowered.

[JIM THEO]

Originally Posted by gpvecchi

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...

[Racecomp Engineering]

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

- Andrew

[spike021]

Originally Posted by Racecomp Engineering

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.