Ohlins Road & Track for FRS/BRZ suspension install/review thread

[Sleepypistonracing]

Yeah I'd wanted that for a long time but the regulations in the time attack series doesn't allow for after market roll bars in my class. Next year though!

[nikitopo]

Originally Posted by ajc209

Problem is changing damping only effects balance during weight transfer. Its roll stiffness that effects handling balance in a steady state corner so roll bars and/or spring rates are what need changing.

It is possible to increase roll stiffness just with the damper. The Sachs dampers in the performance package is an example. Springs are the same. Another example the '14-'16 revised suspension which was more comfortable, but at the same time with less body roll. Again with same springs. So, it is possible ...

[ajc209]

Originally Posted by nikitopo

It is possible to increase roll stiffness just with the damper. The Sachs dampers in the performance package is an example. Springs are the same.

No it isnt. Dampers only react to motion, not steady state. Only way would be to run a silly amount of gas pressure.

Originally Posted by nikitopo

Another example the '14-'16 revised suspension which was more comfortable, but at the same time with less body roll. Again with same springs. So, it is possible ...

More comfortable and less body roll, sure if they improve the valving with higher spring rates but whats that got to do with my statement that dampers dont effect stead state roll?

[nikitopo]

Originally Posted by ajc209

No it isnt. Dampers only react to motion, not steady state. Only way would be to run a silly amount of gas pressure.

More comfortable and less body roll, sure if they improve the valving with higher spring rates but whats that got to do with my statement that dampers dont effect stead state roll?

This is your own statement and I gave you examples that your statement doesn't hold. What is the strange with that? In both cases there was less body roll and the only change was in the dampers. No changes in springs, no changes in anti-roll bars.

[ajc209]

Originally Posted by nikitopo

This is your own statement and I gave you examples that your statement doesn't hold. What is the strange with that? In both cases there was less body roll and the only change was in the dampers. No changes in springs, no changes in anti-roll bars.

They must defy laws of physics then.

Roll stiffness has nothing to do with dampers. Any good chassis engineering book will tell you this but here is a link with some basics

https://ismasupers.com/downloads/tec...tiffness-4.pdf

now lets no fill this thread with anymore nonsense and get back to the topic of the Ohlins Road and Track Coilovers.

[Icecreamtruk]

Stiffer dampers (on compression mainly) give you the impression that the car roll less because it takes a bit longer to get settled. But dampers do not affect steady cornering for sure. They can however make the car feel like it rolls less in quick transitions or small corners where there isnt enough time for the car to settle up completely. Or also if you are not driving as hard as you though, but this is rarely the case, as our springs are soft enough that even slow turns will completely load them up.

[Sleepless]

Originally Posted by ajc209

With those roll bars, that is quite a lot of roll stiffness. @Sleepless you are using AD08Rs IIRC?

I've currently got MI20 with stock rates and 235/40/18 AD08Rs

I've switched to stickier tires like the Trofeo R and R888R.

[ajc209]

Originally Posted by Sleepless

I've switched to stickier tires like the Trofeo R and R888R.

Would be interested how you feel about this setup on track compared to stock MI20.

[mav1178]

I miss my Ohlins some days.

[ajc209]

Originally Posted by mav1178

I miss my Ohlins some days.

Did you sell them or the car?

Sent from my SM-G935F using Tapatalk

[mav1178]

Originally Posted by ajc209

Did you sell them or the car?

Both..

[nikitopo]

A video that shows the difference of the stock suspension and the newer Ohlins suspension. In both cases the tires and top mounts are stock. Check how the rear loses grip constanly with the stock suspension (almost un-drivable) and how planted is after the change. I would say that changing the rear springs to softer is one of the best changes that you can do in this car. At least if you want to be fast!

[ame="https://www.youtube.com/watch?v=5yseG69GQ1g"]Toyota 86 Stock Suspension vs Ohlins Road & Track Coilovers - YouTube[/ame]

[ajc209]

Originally Posted by nikitopo

A video that shows the difference of the stock suspension and the newer Ohlins suspension. In both cases the tires and top mounts are stock. Check how the rear loses grip constanly with the stock suspension (almost un-drivable) and how planted is after the change. I would say that changing the rear springs to softer is one of the best changes that you can do in this car. At least if you want to be fast!

That's a nice video and thanks far sharing, but its it driver dependent and most people on this forum prefer a square setup.

In that video you can see he's getting some understeer with the Ohlins. If he had better control of his throttle inputs with the stock setup he wouldnt be fighting the back end as much.

Most people couldn't drive a race car fast and would be able to go quicker in a more understeer biased setup, but a racing driver would go faster in the more balance setup than an understeering setup.

[nikitopo]

Yes the driver should have a smoother control, but the rear end would still be a bit nervous. Ohlins gives more understeer, but this is the current trend in racing. In the old days the race cars were either balanced or with more oversteer, but they were more difficult to drive. Also this was made on purpose to offer spectacle to the public. There are some saying that current race drivers are not on par with the old ones, but this is nonsense. The new race drivers and the new setups are much faster than the old ones.