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Uprated clutches and flywheels

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Old 10 August 2018, 11:10 AM   #1  
David__H
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Default Uprated clutches and flywheels

I have an Exedy Pink clutch on my Hawk STi which is currently making 350 bhp and 360 lbft. I've always found the clutch to be hard work in traffic since it bites quite agressively and moving off from rest smoothly is a matter of getting the revs between 2000-2500 rpm and feeding in the clutch carefully, otherwise the car jolts. I've always blamed the clutch for this abrupt behaviour and was thinking of changing it, but my question is, is it the clutch itself or is it more likely a symptom of a lightened flywheel (I have no idea what flywheel I have)?

Given I'm going to 400 bhp later this year (already have a forged rebuild), I was considering changing to a Stage 2 competition clutch. Just wondering if it'll be more or even less friendly when I'm stuck in traffic. Should I be looking to change the flywheel too?

Thanks

David
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Old 10 August 2018, 11:19 AM   #2  
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Originally Posted by David__H View Post
I have an Exedy Pink clutch on my Hawk STi which is currently making 350 bhp and 360 lbft. I've always found the clutch to be hard work in traffic since it bites quite agressively and moving off from rest smoothly is a matter of getting the revs between 2000-2500 rpm and feeding in the clutch carefully, otherwise the car jolts. I've always blamed the clutch for this abrupt behaviour and was thinking of changing it, but my question is, is it the clutch itself or is it more likely a symptom of a lightened flywheel (I have no idea what flywheel I have)?

Given I'm going to 400 bhp later this year (already have a forged rebuild), I was considering changing to a Stage 2 competition clutch. Just wondering if it'll be more or even less friendly when I'm stuck in traffic. Should I be looking to change the flywheel too?

Thanks

David
I had an competition clutch and flywheel package on my last forged 2.5 blobeye running 440bhp, was a great clutch for everyday use no harsh bite or unwanted noises. I currently have an extreme lightweight flywheel and ap racing clutch in my hawk sti running 350/370 and i find it about as close to a stock one as possible......almost perfect in every way.
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Old 10 August 2018, 11:38 AM   #3  
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Comp stage 2 clutch in mine is fine with a lightened flywheel. Not heavy at all. Copes well with 500/430 as a weekend car
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Old 10 August 2018, 03:31 PM   #4  
David__H
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Is this what you're running?

https://scoobyworx.com/subaru-imprez...ge-13097-p.asp
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Old 10 August 2018, 09:57 PM   #5  
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I've had an exedy pink in my previous and current sti and no such issue with it being aggressive, in fact it's no worse than std clutch just a bit heavier

is yours an exedy puck/paddle clutch?

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Old 10 August 2018, 10:06 PM   #6  
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yes. Think they do a scoobynet discount too
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Old 12 August 2018, 10:31 AM   #7  
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Originally Posted by David__H View Post
I have an Exedy Pink clutch on my Hawk STi which is currently making 350 bhp and 360 lbft. I've always found the clutch to be hard work in traffic since it bites quite agressively and moving off from rest smoothly is a matter of getting the revs between 2000-2500 rpm and feeding in the clutch carefully, otherwise the car jolts. I've always blamed the clutch for this abrupt behaviour and was thinking of changing it, but my question is, is it the clutch itself or is it more likely a symptom of a lightened flywheel (I have no idea what flywheel I have)?

Given I'm going to 400 bhp later this year (already have a forged rebuild), I was considering changing to a Stage 2 competition clutch. Just wondering if it'll be more or even less friendly when I'm stuck in traffic. Should I be looking to change the flywheel too?

Thanks

David
Your pink box should cope with 400 bhp or so. I was running 470/476 on my pink box . No issues . Now I'm rotated at 523/480 and 553/504 on meth. Still ok with no issues . Must stress not launching the classic but I do drive it hard .

Maz
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Old 12 August 2018, 08:53 PM   #8  
David__H
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Your pink box should cope with 400 bhp or so. I was running 470/476 on my pink box . No issues . Now I'm rotated at 523/480 and 553/504 on meth. Still ok with no issues . Must stress not launching the classic but I do drive it hard .

Maz
Yeah, mine's a bit long in the tooth anyway, so plan to change it. I did see some folk are running very high power and torque with it, but like you say, it's about how you drive the car.

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