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act hdss or xtss for 500whp

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Old Mar 23, 2008, 05:26 PM
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Originally Posted by dpacific
500+ Exedy twin disk, ACT has HARSH engagement.
I think the ACT XTSS feels just like stock engagement to me.
Old Mar 24, 2008, 08:58 PM
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yeah you get so used too it i loved my hdss, gona xtss next, it'll handle mostly anything........
Old Mar 24, 2008, 09:59 PM
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are you guys running solid or sprung six pucks?
Old Mar 24, 2008, 10:11 PM
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Originally Posted by E VOL IX
ACT IS GARBAGE>... i burnt up a act hdss in 15k only taking it to the track twice... this was before 35r/meth...the ACT will hold fine.. but not as long as a twin will

have had a cusco twin since and NEVER had it slip or anything... holds great..

and if you drive your car on a daily basis haha stay AWAY from a tilton twin... i just got done building a IX with a built 2.0/jam head/35r.. that tilton makes a TON of noise and is terrible in traffic..
either it wasnt installed correctly or you just dont know how to drive. I have had my act hdss for 2 1/2 years and the entire time ive had 400+ hp

In the last 6 months this clutch has seen my 35r and meth with atleast 45 launches on it and tons of street abuse. Ive actually been trying to burn it up since i have a new clutch waiting to go in.
Old Mar 26, 2008, 04:56 PM
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Originally Posted by evofool
are you guys running solid or sprung six pucks?
Sprung 6puck
Old Mar 26, 2008, 05:04 PM
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xtss just installed in my car approx, 1k miles...pedal is hard

and shifting is notchy on spirited driving to the point wont engage fast.
Old Mar 26, 2008, 05:07 PM
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The ACT locked me out about 90% of the time when I was at the track. Do it right and get the twin.
Old Mar 26, 2008, 05:07 PM
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Adjust the XTSS, I had a HDSS and I could shift at 8000 NO issues, what so ever. Loved that clucth, never once caused an issue.
Old Mar 26, 2008, 08:27 PM
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This is my second Act...and having same problem. Ont the other hand my Rps 6 puck did very good.
Old Mar 26, 2008, 08:34 PM
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im still on my act hdss, but i have a xtss with a solid hub 6 puck waiting to go in...
Old Mar 27, 2008, 07:21 AM
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just an update, i made 504whp and 456tq with the hdss. still holding strong.
Old Mar 31, 2008, 05:32 PM
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I'm about the put the ACT Extreme in; I had the ACT Heavy duty for many miles of spirited driving and loved it. Once the clutch rod was adjusted it worked perfectly w/ no lockout. I'm looking forward to seeing how the Exteme holds up.
Old Mar 31, 2008, 06:32 PM
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same here im going with the xtss with my 35r setup
Old Mar 31, 2008, 09:51 PM
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I hear from very reliable source the ACT clutch is very bad for your thrust bearing. It puts too much pressure on the crank all the time, minimizing the effectiveness of the lubrcant causing excessive wear. Too bad for me. I just bought one. Imma switch to an exedy twin plate here in a minnut. I only have 200 miles on this clutch but I don't want to kill my build because of something stupid like that.
Old Mar 31, 2008, 10:08 PM
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Then I'd question just how reliable that source is . I constantly see different so called "experts/vendors" come up with varying opinions on products when it suits their needs. Unless you're driving a 2G Eclipse that is prone to crank walk that makes no sense. The only time the extra clamp load becomes an issue for the bearings is on cold start up.

If you're that worried about it disconnect the clutch switch so you don't have to press the clutch to start the car. Apart from that, once the engine is warm the only time your foot should be on the pedal is when you're changing gears. At that point the bearings should have sufficient lubrication, if they don't the clutch is the least of your problems.


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