924Board.org

[ideola]

Does any one know what the thread pitch is on the 931 injector, where it threads into the brass portion of the injector bung? The injectors themselves are ~9mm at the barrel, and the thread is very fine. I've never heard of an M9...
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erstwhile owner of just about every 924 variant ever made

[Mike9311]

[Mike9311]

[Mike9311]

Looked like it too under the scope. 0.7 and 0.8 don't work and are not standard anyway. Standard 0.5, which is even finer, is super far off
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

[ideola]

But I think it's M9, not M10, right? I'm measuring the barrel at 9mm.
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erstwhile owner of just about every 924 variant ever made

[Fasteddie313]

Minor diamiter of m10x0.075 threaded hole is 9.378-max 9.188-min.

So if your measuring that hole somewhere between 9.188 and 9.378 then it is correct for a m10x0.075

M9x0.75 is 8.188 to 8.378
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80 Turbo - Slightly Modified

[Mike9311]

I have the barrel measured at near 9.1 for my example. The minor would be larger than the 9.1 so its still more likely at 10 x 0.75

Threads play tricks with the mind

I only have 10 x 1.5 bolts here and a 10 x 1.0 tap. Each measure at the same dia as the injector for 10mm
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

[Mike9311]

You could always order a nut to test
_________________
1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car