I will be getting a new clutch soon for my 2007 STI running about 470 ft/lbs. It currently has an Exedy Pink Box but that isn't quite coping. Not planning on doing many drag starts or track days, mainly road use. I really need something that is easy to live with and not juddery/smelly/noisey/too heavy, I reverse up a hill into my driveway so some decent modulation will help. Basically something as close to standard as possible but works up to 500 ft/lbs

After some research I have settled on either an ATS Blade Clutch or ACT HDSS and need some input on what they are like in a Scooby. I will probably change the flywheel to the matching ATS or ACT one at the same time for reliability and performance. I would prefer a full weight (18.9 lbs?) flywheel but will live with a slightly lighter (~15lbs) one if its higher quality.

The clutches are rated by the manufacturers at -
ACT SB10-HDSS 515 ft/lbs


ATS Blade Clutch 500 ft/lbs


I have discounted twin plates on usability and price and the fact they are usually rated way beyond the 500 ft/lbs that I need. Any opinions from people that have used either of the above two clutches ?

 

I have driven with the act clutch that you have posted it was nice to drive a stiffer clamping force then the pink box Exedy but still drivable and easy to get use too.SJ.

 

Competition Clutch drives nicely and will handle that power. These have been proving very popular and fill the gap nicely between a Exedy Pink and Exedy Twin: http://aztecperformance.com/clutches...7-6-speed.html

 

Regarding the competition clutch kit, how would this cope with launching on a sprint car. 2.5 classic circa 450-500 bhp

 

If it's for a sprint car I would fit a Competition Clutch sprung paddle clutch. Same price (£342), more positive engagement than an organic clutch and will take much more power and abuse.

Pics, details online: http://aztecperformance.com/clutches...4-5-speed.html

 

Right ok, looks a good option. It's for a 6speed that's in a classic. This isn't a sprint car, it's a road car used for sprinting and track days.
How would something like this drive day to day? What's the pedal feel like?

Thanks

 

You would need to make that judgement call, for me I would fit the paddle. It's sprung so retains many road manners, expect a slightly heavier peddle and getting used to the on/off nature in stop/start traffic. Out on the open road, sprints and tracks it has the advantage of more positive engagement.

They are made for people who track their cars but also like to retain some road manners.