What can you learn from a shock dyno chart? Or shock dyno 101

[RBbugBITme]

Just a confidence inspiring feeling as a driver that the vehicle is stable in all conditions.

[nikitopo]

Originally Posted by RBbugBITme

Is the above BRZ dyno from a 2014 or 2015 shock? I'm told the spring rate and shock curves were changed.

This is a comparison graph between a MY14 and MY15 gt86/brz front and rear suspension:



Red is the new improved suspension and green is the old one.

Can someone explain what is the improvement? What I can understand is that there is an improved compression damping and an almost similar rebound damping.

[RBbugBITme]

Impossible to say for me. Many OEMs invert the graph so rebound could be on top or bottom and there is no y-axis scale to compare. I don't know Japanese either.

[Racecomp Engineering]

Yeah my guess is rebound is on top there. It'd be nice to know Japanese and have a y-axis scale. Are you sure red is new?

- Andy

[nikitopo]

Originally Posted by Racecomp Engineering

Yeah my guess is rebound is on top there. It'd be nice to know Japanese and have a y-axis scale. Are you sure red is new?

- Andy

Yes, I used a translation tool.

改良接 -> improved

Here is the other text:

操安性 :操舵応筈か向上し、 □一ル感、 軽快感か向上 ->
Stability: enhanced Steering response should do, □ deprived sense, lightness increase

乗り心地:フラツ卜感向上、 微振動憧減 ->
Riding comfort: fix feeling improvement flats, micro vibration primary reduction

[cdrazic93]

Originally Posted by Racecomp Engineering

OEM BRZ/FRS shocks

This thread qualifies for sticky because of this single post. Too often do I find "have the OEM shocks been dyno'ed yet?" *grumble*


Yay physics

[cdrazic93]

Originally Posted by Racecomp Engineering

when you stumble across a shock dyno chart in the wild.

A wild shock dyno appeared?

86er fan throws hondafan boy at it!

Its not very effective...

86er fan throws Racecomp Engineering at it!

Critical hit!!

[nikitopo]

Originally Posted by RBbugBITme

Impossible to say for me. Many OEMs invert the graph so rebound could be on top or bottom and there is no y-axis scale to compare. I don't know Japanese either.

Originally Posted by Racecomp Engineering

Yeah my guess is rebound is on top there. It'd be nice to know Japanese and have a y-axis scale. Are you sure red is new?

- Andy

I believe you are right. The graph is inverted and rebound is on top.

[Racecomp Engineering]

I keep forgetting to post our T2 and T0 plots in here. I'll do it tonight, I promise.

- Andy

[Racecomp Engineering]

T2s and T0s

[Racecomp Engineering]

Bump. I'll be writing the next chapter soon.


- Andrew

[solidONE]

Originally Posted by nikitopo

This is a comparison graph between a MY14 and MY15 gt86/brz front and rear suspension:



Red is the new improved suspension and green is the old one.

Can someone explain what is the improvement? What I can understand is that there is an improved compression damping and an almost similar rebound damping.

They have it backwards. the upper trace is the rebound damping, not compression. "confidential" it says. Nice find! Looks to be slightly less compression damping, with little more low speed compression in the front and more rebound. Explains why the new sachs damper feel more compliant than the old showas.

[cookiesowns]

Originally Posted by Racecomp Engineering

I keep forgetting to post our T2 and T0 plots in here. I'll do it tonight, I promise.

- Andy

Any chance of T3 plots?

[Racecomp Engineering]

Originally Posted by cookiesowns

Any chance of T3 plots?

Yes, brb.

- Andrew