2015 Suspension Differences (BRZ and FR-S)

[wparsons]

Originally Posted by Maxwell

I read your post. I cannot assume what you said is correct without proof.

Go read it again...

Originally Posted by wparsons

I don't think anyone has 100% confirmed, but the consensus is that both cars got new shocks but the spring rates are unchanged.

I'm never going to confirm it because I've already said that I don't think anyone has 100% confirmed it.

If you want a definite answer, call your local dealership and ask about part numbers between 2013/2014 and 2015.

[Hyper4mance2k]

So I looked up the part numbers and Subaru lists the same shock number for 2013-2015 (20310 Front & 20365 rear); however, I just replaced my 2014 Limited with a 2015 S.B, and they drive totally different. The 2015 feels much better dampened. It's not nearly as bouncy. In fact it's so much better that my Bilsteins and Swift Spec R's are just sitting in a box for the time being. I'm not even going to bother installing them until I know I'm headed to the track.

edit: it could also be that my S.B only has 8k on it and my Ltd was approaching 24k when I swapped to Bilsteins.

[cdrazic93]

Originally Posted by Hyper4mance2k

So I looked up the part numbers and Subaru lists the same shock number for 2013-2015 (20310 Front & 20365 rear); however, I just replaced my 2014 Limited with a 2015 S.B, and they drive totally different. The 2015 feels much better dampened. It's not nearly as bouncy. In fact it's so much better that my Bilsteins and Swift Spec R's are just sitting in a box for the time being. I'm not even going to bother installing them until I know I'm headed to the track.

edit: it could also be that my S.B only has 8k on it and my Ltd was approaching 24k when I swapped to Bilsteins.

DEAR GOD SIR, may i trouble you for some shock dynos? Im sure RCE would be more than willing to troubleshoot that for you

[Hyper4mance2k]

Originally Posted by cdrazic93

DEAR GOD SIR, may i trouble you for some shock dynos? Im sure RCE would be more than willing to troubleshoot that for you

There's nothing to troubleshoot. I'm just noting that my 2015 rides better than my 2014. I commute 130 miles a day, so a decent ride is important. I'm not saying the Bilsteins are bad, but they're not as comfortable as stock on long trips.

[cdrazic93]

Originally Posted by Hyper4mance2k

There's nothing to troubleshoot. I'm just noting that my 2015 rides better than my 2014. I commute 130 miles a day, so a decent ride is importnat. I'm not saying the Bilsteins are bad, but they're not as comfortable as stock on long trips.

Its hard to imagine the variance in the new shocks for rebound and compression, it could be one of those OEM+ upgrades people look for knowing the dyno graph.

[ryoma]

I always felt that my 2015 BRZ rode extremely well. It was my first BRZ so I couldn't compare it to any others, but I felt that the suspension was extremely firm and not bouncy at all. I was surprised at how firm it was from the factory, it was almost as good as my old MR2 with GC coils and Koni's. The handling was similar to my brother's STI on Feals. though, I haven't really pushed the car to its limits and will check that out next month at the track.

[Naco]

From my understanding, it was just the FRS front struts that were changed to be the BRZ spec struts. Toyota wanted to remove some of the tail-happiness that the 2012-14 models had.

As far as adding TRD springs to a '15, I would indeed be a bit wary. The TRD springs were designed to work with the older front struts (read: less dampening). This is why Swift had FRS Spec and BRZ Spec springs for the '12-14 models. The '15 front struts will work well with anything that was BRZ specific or was applicable to both cars (RCE, RSR, etc).

[Hyper4mance2k]

Originally Posted by Naco

From my understanding, it was just the FRS front struts that were changed to be the BRZ spec struts. Toyota wanted to remove some of the tail-happiness that the 2012-14 models had.

As far as adding TRD springs to a '15, I would indeed be a bit wary. The TRD springs were designed to work with the older front struts (read: less dampening). This is why Swift had FRS Spec and BRZ Spec springs for the '12-14 models. The '15 front struts will work well with anything that was BRZ specific or was applicable to both cars (RCE, RSR, etc).

You, sir, are incorrect. The FRS & BRZ have the same dampers, they had different front spring rates. Way to infer what the manufacturer does based on casual observation of the aftermarket. Correlation does not imply causation.

[wparsons]

^^ Slight correction, both spring rates were different between FRS and BRZ's.

FRS F/R: 2.3k/3.8k

BRZ F/R: 2.7k/3.5k

I found with the stock springs the car was over damped, especially up front. It really feels like they went a bit heavy on the damping even with the stiffer of available rates, and since they shared damping rates it needs to work with both the spring rates.

[Hyper4mance2k]

It's not a correction, it's an addition to my statement. I never made the claim that the rears weren't different. I was just letting him know the error in his ways because I'm constantly shocked at the amount of misinformation posted on this site, despite the correct information being posted 2 clicks away.

[Maxwell]

Originally Posted by Naco

From my understanding, it was just the FRS front struts that were changed to be the BRZ spec struts. Toyota wanted to remove some of the tail-happiness that the 2012-14 models had.

As far as adding TRD springs to a '15, I would indeed be a bit wary. The TRD springs were designed to work with the older front struts (read: less dampening). This is why Swift had FRS Spec and BRZ Spec springs for the '12-14 models. The '15 front struts will work well with anything that was BRZ specific or was applicable to both cars (RCE, RSR, etc).

The TRD springs are not shown to be compatible with the 2015 FR-S on Toyota's official parts site. I find that odd due to the fact that the 2015 RS 1.0s have TRD springs installed.

[AustinG]

Originally Posted by Maxwell

The TRD springs are shown to be compatible with the 2015 FR-S on Toyota's official parts site. I'm wary about putting them on my 2015 BRZ.



I recently became friends with someone who has the TRD springs on his BRZ. He's happy with them, however he has a 2014 model.

I may be wrong, but I thought the 2015 RS 1.0's had the TRD springs installed already.

[Maxwell]

Originally Posted by AustinG

I may be wrong, but I thought the 2015 RS 1.0's had the TRD springs installed already.

They do.

[AustinG]

Originally Posted by Maxwell

I'm wary about putting them on my 2015 BRZ.

Whoops. Totally read this as FRS. -___-