2nd Generation Specific 1986-1992 Discussion

Quick Clutch Questions S4 And S5?

Old 03-28-2005, 12:31 AM
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is a s4 clutch compatible with a s5 block? They are both turbo engines, I just know that ACT sells a s4 clutch and a s5 clutch (the same style) as seperate prices. Im not sure if the holes will line up, etc... as far as I can see, they should work with eachother.



The reason I ask is because my friend gave me his act cluch hes not using, since I burnt mine up and I need a temporary.
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Old 03-28-2005, 12:55 AM
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i think the s4 clutch has to be on a s4 trans, and a s5 clutch on s5 trans.
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Old 03-28-2005, 01:37 AM
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i got it .... they are interchangeable with the turbo models.
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Old 03-30-2005, 04:01 AM
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you cant swap clutches n/a on n/a trannies turbo clutch on turbo trannies, the turbo clutches are 23 spline and the n/a are 22.. im not sure if you can swap between s4 and s5
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Old 03-30-2005, 07:10 AM
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well I originally bought a clutch for my 87 tii (S4), but ended up putting it on a 13B-RE (S6??) bolted on fine.
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Old 03-30-2005, 07:42 PM
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flywheel has to match engine series (interchangeable Sx n/a or Sx turbo) and clutch has to match trans (n/a or turbo)
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Old 03-31-2005, 04:26 AM
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Im using a s4 rb flywheel on a s5 block. The s4 clutch will obviously bolt to the s4 flywheel... which will also work with the s5 tranny.



No problems so far.
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Old 03-31-2005, 10:18 AM
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damnit. people are confusing me, thats what i read from nopistons and teamfcs...



so you are using a different counterweight correct?
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Old 03-31-2005, 01:13 PM
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I had a stock S5 TII clutch on my S4 TII with no problems.
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Old 04-02-2005, 05:15 AM
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I'm using s4 rotors in a s5 block ... with a s4 lightend flywheel (RB) and a s4 counter weight from a s4 vert. Right now The s5 stock clutch is bolted on. Im replacing it with an ACT s4 clutch. It will work fine



Its a special engine, but damn its a frankenstein... lol We're gonna throw 30psi at it and see how she handles
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