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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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 Posted: Tue May 19, 2009 2:17 am Post subject: Bore size for clutch slave cylinder? |
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I need this measurement in order to spec out and order my Tilton pedal box setup. Does anyone know it off hand?
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erstwhile owner of just about every 924 variant ever made |
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Smoothie
Joined: 01 Jan 2003
Posts: 8032
Location: DE (the one near MD, PA, NJ)
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| Posted: Tue May 19, 2009 2:54 am Post subject: |
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23mm comes to mind for some reason, but that would need verifying.
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"..it's made in Germany. You know the Germans always make good stuff."
'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Tue May 19, 2009 3:04 am Post subject: |
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OK, pardon my ignorance, I've never had one of these apart, what is it exactly that I need to measure? The I.D. of the bore, or can I just measure the diameter of the piston?
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Smoothie
Joined: 01 Jan 2003
Posts: 8032
Location: DE (the one near MD, PA, NJ)
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| Posted: Tue May 19, 2009 6:50 am Post subject: |
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Yes, it is 23mm, verified by measuring some old seals.
You should find the ID of the cylinder is 23mm, and the OD of the piston just very slightly less - like a few thousanths" less.
-But it is the ID of the cylinder you want, for your purpose.
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"..it's made in Germany. You know the Germans always make good stuff."
'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Tue May 19, 2009 7:30 am Post subject: |
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As our buds from across the pond would say, Smoothie, you're a star  Thanks a bunch!
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erstwhile owner of just about every 924 variant ever made |
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ideola
Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
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| Posted: Tue May 19, 2009 12:11 pm Post subject: |
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OK, so the Tilton guy says I need to match my Tilton master cylinder to the bore size of the stock slave cylinder. But their cylinders are measured in inches not mm. Considering that the 931 slave is 23mm, wonder which would be better: 15/16" / .9375" / 23.8mm OR 7/8" / .875" / 22.2mm?
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Tue May 19, 2009 1:05 pm Post subject: |
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Better to underfill the slave than overfill, IMO.
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- WeiBe (1987 924S 2.5t) - 931 S3
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