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Scorpio · Posted: Mon Aug 26, 2013 8:23 pm Post subject: Spec clutch upgrade

Incase anyone was interested in an upgraded clutch from spec
Here is some of their correspondence to me

"Clutches are rated in torque, so for 250 ft lbs + with good clutch life I like st2+ or 3. The small 8.5 diameter is limiting, even with our high clamp load version. The st1 is OK just over 200 ft lbs, but I’d rather help you get into your budget than sell you something that may not live as long as you want. Has the car been on the dyno yet ?"

And

"Yes, st2+ would be fine..stage 3 as well. The st3 is plenty streetable, but on the upper end of street aggressiveness, so the engagement will be quicker than a normal fiber based clutch. The st2+ is a hybrid and drives very nicely. So I would choose based on desired engagement feel from a stop..the 2+ will feel more like stock than the 3, but the st3 is still considered a street/track unit. "

I emailed them asking for a streetable clutch option to directly swap Into the stock 924 clutch with 250hp plus ( aftermarket turbo )

I went with spec stage 2 plus and it fit it perfectly... Still haven't tested it
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

I used Stage 3+ for years without any problems and it is very streetable.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

Scorpio · Posted: Mon Aug 26, 2013 8:56 pm Post subject:

The part number for the spec 2+ is
SP153H I purchased for $445 + shipping from USA

Race boy -- I read somewhere you said that you hit 300hp on stock engine with boost and gearbox was fine if you didn't do 1st gear launch... This makes me happy to hear!
What's your opinion on gear staged boost...
Ie - low psi boost in first gear then once hitting second gear -high boost( simple gear switch)
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!

DutchPug · Joined: 27 Jul 2008 Posts: 94 Location: the Netherlands

Wanted to go for a Spec stage3 too, but this is what they said about torque capacity;