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Bockscar · Joined: 16 Nov 2010 Posts: 392 Location: Sandy, Oregon

Is there a non-oem replacement part for part #931 110 157 02, the rubber charge tube sleeve for an S1? The closest thing that I've found is an over-sized rubber sleeve with a hole in the middle for some kind of sensor for a VW.
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Brian
'79 924 - Restoration In Progress
'81 924 Turbo w/EFI - Scrapped

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Throw it all away, switch to S2 manifold.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Bockscar · Joined: 16 Nov 2010 Posts: 392 Location: Sandy, Oregon

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

That's odd, I would call it minimal effort for appreciable gain, but good luck with the windmills!
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Bockscar · Joined: 16 Nov 2010 Posts: 392 Location: Sandy, Oregon

ideola · Joined: 01 Oct 2004 Posts: 15550 Location: Spring Lake MI

Why not just calculate what size diameter the ovoid coupler would be if it was a circle, and then order a section of suitably sized silicone? Silicone is flexible enough to be compressed into the ovoid shape you need using the OEM (gasp!) band clamps for the OEM boot.
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erstwhile owner of just about every 924 variant ever made

fiat22turbo · Joined: 18 Jan 2006 Posts: 4040 Location: Portland, OR

BTW, the I think Rasta was trying to say that swapping to the S2 charge tube and intake would get you a round opening at the throttle body end with which to couple to (both of which is mostly the same as the S1 except for the throttle body opening and mounting). If your throttle body is also already round and not oval then even better.

The S2 throttle body is rebuildable to reduce/eliminate leaks, etc., while the S1 isn't (at least it isn't worth the effort it seems)

Either way, a piece of string around the oval ports would get you the circumference which could then be converted into diameter via simple math and allow you to determine the closest round reinforced rubber or silicone hose section. Large truck service shops (big rig) typically have really nice reinforced rubber radiator hose in very large diameters and you could see if there was any excess laying around they would give you/buy. My brother did this for one of his turbo cars and that hose was impressive in its strength to say the least.

Or you could ditch the stupid charge tube and add an intercooler, but that would be a lot more work to adapt (on the turbo side mostly is seems), but would gain you quite a bit more in the long run.
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)