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

[ajc209]

Originally Posted by Sleepypistonracing

Yeah they are supposed to go with the oem top mounts so anything that's supposed to go on the oem strut should fit them. I use mine with velox adjustable top mounts in the front and oem bearing in the rear. Öhlins are using some spacecraft grade bearings in their top mounts and they are not worth the money (500ish a pop).


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Why are they not worth the money if they are spacecraft grade?

[LOLS2K]

Originally Posted by ajc209

Why are they not worth the money if they are spacecraft grade?

[Sleepypistonracing]

Originally Posted by ajc209

Why are they not worth the money if they are spacecraft grade?

Get them if you want to pay double for the kit. Öhlins themselves recommended me to get something else


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[ajc209]

Originally Posted by Sleepypistonracing

Get them if you want to pay double for the kit. Öhlins themselves recommended me to get something else


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I've got the mi20 kit which came with the top mounts. Here in the uk the mp20 is £1750 and top mounts add £600 iirc. Are you saying they are 500 per corner?

[Sleepypistonracing]

Wow that's crazy. In Sweden they are about 400£/corner. They seem to be priced similar on modbargains in the us with 1500$ for all four. I'm testing new spring rates for them during this years season too btw!


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[ajc209]

Originally Posted by Sleepypistonracing

Wow that's crazy. In Sweden they are about 400£/corner. They seem to be priced similar on modbargains in the us with 1500$ for all four. I'm testing new spring rates for them during this years season too btw!


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Ive seen you on the 86 track car FB group 👍

[Sleepypistonracing]

Nice! I've started a project thread here yesterday. I will post any and all updates on the Ohlins there whenever I have something new to tell

[ajc209]

Originally Posted by Sleepypistonracing

Nice! I've started a project thread here yesterday. I will post any and all updates on the Ohlins there whenever I have something new to tell

It is interesting they dropped the rates claiming they were faster on their local circuit in sweden. I was under the impression the mi20 kit was developed at the nurburgring which is bumpy to say the least.... and they settled on 60N/mm on all corners...

[Sleepypistonracing]

Agreed. My contact at Öhlins is saying that 6/6 was undrivable. It's strange though considering our tracks are a lot better than the ring and competitors are running much higher rates. However, the ohlins dampers are extremely advanced. They are very similar to the TTX dampers (a kit starts at about 10000£). They are also running with a lot of pretension on the springs. About 30mm. This is also quite different than competitors. I know that they are very conservative in their spring rates on all their Porsche kits as well but still they are beating others. It's gonna be very interesting to try them out on track soon

[ajc209]

Originally Posted by Sleepypistonracing

Agreed. My contact at Öhlins is saying that 6/6 was undrivable. It's strange though considering our tracks are a lot better than the ring and competitors are running much higher rates. However, the ohlins dampers are extremely advanced. They are very similar to the TTX dampers (a kit starts at about 10000£). They are also running with a lot of pretension on the springs. About 30mm. This is also quite different than competitors. I know that they are very conservative in their spring rates on all their Porsche kits as well but still they are beating others. It's gonna be very interesting to try them out on track soon

I was also told the DFV is very advanced too. Ive seen the piston design somewhere. It has three oil paths so the transition is smoother than the classic digressive knee. This makes for a smoother ride but also more grip becuase the damping doesn't suddenly stop increasing.

Anyway I tried 70N/mm at the back and found it quite tail happy with -2.5 front and -2deg at the back. I am Cosworth supercharged too though so the extra 25kg at the front also contributed. I switched back to 60N/mm and its mote to my liking. The extra power makes it easy to rotate the back. Perhaps a more skilled driver might like more rear spring by 60N/mm all round is nice.

Regarding the mp20. They are the same dampers as the mi20 just differnt valve rates. According to my spreadsheet they absolutely must run preload or else they will be running on the bumpstops under the weight of the car.

[Sleepypistonracing]

Yes. I was told the 4/3 is for performance tires and that on R-compounds I could increase 1-2 both front and rear without having to revalve the dampers. Hence I don't think there is any difference at all between the dampers in the two kits. I'll ask them next time I talk to them though

[ajc209]

Originally Posted by Sleepypistonracing

Yes. I was told the 4/3 is for performance tires and that on R-compounds I could increase 1-2 both front and rear without having to revalve the dampers. Hence I don't think there is any difference at all between the dampers in the two kits. I'll ask them next time I talk to them though

I think the consensus is up to 25% deviation is okay on the mi20 kit.

I am sure the low speed damping will be different. Critical damping for a 60N spring vs a 30N spring is quite a difference.

[nikitopo]

Originally Posted by ajc209

It is interesting they dropped the rates claiming they were faster on their local circuit in sweden. I was under the impression the mi20 kit was developed at the nurburgring which is bumpy to say the least.... and they settled on 60N/mm on all corners...

I think that the mi20 kit with the 60N/mm rate was based on feedback from the Japan office. There wasn't a development at the Nurburgring.

[Sleepypistonracing]

Originally Posted by nikitopo

I think that the 60N/mm rate was based on feedback from the Japan office.

This is correct! I remember them saying that testing the Japanese spring rates here was pure drifting.

I will let you guys know about the valving after I speak to them again!


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