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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 04-21-2017, 04:04 AM   #1
Strife26
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Clutch Suggestions

I am looking to replace my clutch to replace mine and prep for a turbo.

I was looking at:
Fidanza QWIK-REV v1/v2
Exedy stage 2 and LW Flywheel
ACT Stage 2 equiv and LWFW
Clutch Master Stage 2 equiv (fx250?)
Competition Clutch stage 2 (street series 2100) + LWFL
Spec Clutch stage 2 and LWFL
Or possibly the Centerforce

Does anyone have recommendations? I looked for reviews but I'm not finding much and it usually a different car from 4 years ago.

Quite a few posts mentioned rattle and noise. If I can help it I'd like the best clutch and quietest bang for buck (obviously right?). If rattle is part of it, then I can accept it. I just don't recall rattle on my last stage 2 on an 07 sti. Maybe I just didn't notice it?

Any help is appreciated. Mind the signature ; P.
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Old 04-21-2017, 10:23 AM   #2
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How much torque are you expecting to get after installing the turbo?
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Old 04-21-2017, 11:45 AM   #3
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How much torque are you expecting to get after installing the turbo?
Probably 250 or less, I am certain it should be under 300, but I am not sure as their only dynos are from a stock twin and their base kit, which I am upgrading the turbo and a couple other items. The base kit raises torque by 65.

I don't see it going over 300. The one dyno I see it only hits around 210, so 230 or less is probably realistic with upgraded turbo and components.

I read a lot of the clutches are underrated, but that's the internets...
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Old 07-20-2018, 01:52 PM   #4
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Hi I'm looking for info on this too. What did you decide? @Strife26



There's no info on the FX250 here anywhere.
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Old 07-20-2018, 02:55 PM   #5
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Hi I'm looking for info on this too. What did you decide? @Strife26



There's no info on the FX250 here anywhere.

ACT SB8-XTSS with their lightweight flywheel (lighter of the two)

I've had it a while now and I love it. Huge improvement over the stock clutch and flywheel.
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Old 07-20-2018, 03:01 PM   #6
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Originally Posted by Strife26 View Post
https://www.youtube.com/watch?v=wXdppw34k8I

ACT SB8-XTSS with their lightweight flywheel (lighter of the two)

I've had it a while now and I love it. Huge improvement over the stock clutch and flywheel.
What exactly is this comparison supposed to be showing us?
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Old 07-20-2018, 03:25 PM   #7
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Quote:
Originally Posted by Strife26 View Post
https://www.youtube.com/watch?v=wXdppw34k8I

ACT SB8-XTSS with their lightweight flywheel (lighter of the two)

I've had it a while now and I love it. Huge improvement over the stock clutch and flywheel.

Thanks bud!
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Old 07-20-2018, 04:30 PM   #8
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I was reading lately the details of the STI RA-R in Japan and one of the important things is to keep the balance and smoothness of the rotating components. For example, the flywheel & clutch cover were selected to have a 50% reduction in tolerance on rotational balance. So, whatever clutch and flywheel you choose it is quite important to get balanced in a professional shop. This is even more important with a lightweight flywheel, since you'll have to compensate with less weight all the tolerances of the other rotational components ...

Source: https://www.subaru.jp/wrx/ra-r/driving/powerunit.html
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Old 07-21-2018, 01:04 AM   #9
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What exactly is this comparison supposed to be showing us?
Didn't you read ol @Strife26 's footnote to his post ??

"Please only adult answers.
I'm stupid, retarded, a fkn idiot, and I will kill myself after a couple answers, I already know this (thanks to the interwebs and its logic) so feel free to leave those responses out, thanks.





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Old 07-21-2018, 01:10 AM   #10
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Didn't you read ol @Strife26 's footnote to his post ??

"Please only adult answers.
I'm stupid, retarded, a fkn idiot, and I will kill myself after a couple answers, I already know this (thanks to the interwebs and its logic) so feel free to leave those responses out, thanks.





humfrz
Yes but it does not tell me what the comparison is supposed to show. He appears to be just sitting there reving the car to random numbers.
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Old 07-21-2018, 01:29 AM   #11
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Yes but it does not tell me what the comparison is supposed to show. He appears to be just sitting there reving the car to random numbers.

The RPMs drop faster meaning faster shifts
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Old 07-21-2018, 01:52 AM   #12
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The RPMs drop faster meaning faster shifts
Ah I see. That tenth of a second would indeed totaly transform the car for a top notch driver that has exceended the abilities of the machine.

I will see myself out now.
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Old 07-21-2018, 02:08 AM   #13
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Yes but it does not tell me what the comparison is supposed to show. He appears to be just sitting there reving the car to random numbers.
Well, to help you out, allow me to quote the above post from @nikitopo :

"I was reading lately the details of the STI RA-R in Japan and one of the important things is to keep the balance and smoothness of the rotating components. For example, the flywheel & clutch cover were selected to have a 50% reduction in tolerance on rotational balance. So, whatever clutch and flywheel you choose it is quite important to get balanced in a professional shop. This is even more important with a lightweight flywheel, since you'll have to compensate with less weight all the tolerances of the other rotational components ...

Source: https://www.subaru.jp/wrx/ra-r/driving/powerunit.html"


Now, after reading that and reviewing the reference he made, if you have any further questions, I refer you to ol @Ultramaroon ,our resident clutch expert.





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Old 07-21-2018, 02:13 AM   #14
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Originally Posted by humfrz View Post
Well, to help you out, allow me to quote the above post from @nikitopo :

"I was reading lately the details of the STI RA-R in Japan and one of the important things is to keep the balance and smoothness of the rotating components. For example, the flywheel & clutch cover were selected to have a 50% reduction in tolerance on rotational balance. So, whatever clutch and flywheel you choose it is quite important to get balanced in a professional shop. This is even more important with a lightweight flywheel, since you'll have to compensate with less weight all the tolerances of the other rotational components ...

Source: https://www.subaru.jp/wrx/ra-r/driving/powerunit.html"


Now, after reading that and reviewing the reference he made, if you have any further questions, I refer you to ol @Ultramaroon ,our resident clutch expert.





humfrz
Meh
I have done the light weight flywheel before on other cars. The slight ability to shift marginally quicker was very soon outweighed by the unconvince caused in daily driving. Great for a race car where split second shifts make a difference but not practical for a street car where idling is important.
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