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'86 930 Starter ring gear dimensions help!!

While trying to install a new starter ring gear and pressure plate on my 1986 I found that the ring wonít fit on the on the pressure plate. The ID of the ring is about 232mm vs the pressure plate 235mm OD (about 3mm interference). I not planning to replace any of the two and I bought them many months ago so return is not an option. I need to decide which one I will send to the machine shop but I need to determine which one is wrong. Does any one know the right ID for the ring or OD for the pressure plate (where the ring sits)?
I donít have the original parts to make the measurements. I donít want to modify the ring if it correct (and the part # is the right one 930-116-230.02).
Any help will be greatly appreciated.
Thanks!!
Joe



Old 07-10-2011, 08:51 AM
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Old 07-14-2011, 03:21 PM
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The 930 ring gear is completely flat while the 915 has a lip edge. Youre correct on the part number for the 930 ring gear.
Bruce

Last edited by Flat6pac; 07-15-2011 at 04:23 AM..
Old 07-15-2011, 04:09 AM
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I would rather machine the gear then the pressure plate... Way less damage when fails
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Roland

930 Turbo '81 Too many modifications to list
Old 07-15-2011, 06:06 AM
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Why machine either one, the bolt holes wont line up. Just order one from a recycler.
Bruce
Old 07-15-2011, 09:39 AM
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Bruce,
Even when the picture is not clear, the ring on the picture is completely flat. Also the bolts align but the ring will not go all the way trough in the pressure plate because there are about 3mm interference.

I saw in other post you have starter rings and pressure plates outside the car. Can you measure them and let me know the approximate inside diameter of your starter ring and the outside diameter of the pressure plate (where the ring sits)?
Regards,
Joe
Old 07-17-2011, 07:07 AM
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Then machining could be a solution...
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Roland

930 Turbo '81 Too many modifications to list
Old 07-17-2011, 09:24 AM
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Bruce
Old 07-17-2011, 09:42 AM
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You might have gotten a G50 flywheel somewhere thinking its a 930
Bruce
Old 07-17-2011, 09:47 AM
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Bruce and Roland,
Thanks for your replies!!
Bruce
My guess now is that the pressure plate might be the wrong one as my ring has aproximately the same dimensions as the one on your pictures.


I guess you wanted to say pressure plate instead of flywheel. Not sure if all G50's have the same pressure plate but I compared it with one I have from a 1991 911 turbo and they are way different and the starter ring is part of the flywheel in those cars.




Now the question is if there are other dimensions that will make the pressure plate unsable on a 1986 930. Do you know if the pp for a 1986 is the same as the one on your pictures?
Old 07-17-2011, 03:51 PM
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Sorry about the flywheel instead of pressure plate statement.
All the turbo clutches are the same from 1978 to 1988. In 89 the company went to G50-50 for the turbo and then into dual mass flywheels in the 90s.
Bruce
Old 07-17-2011, 04:59 PM
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Bruce,
After cleaning the pp I was able to read the number, 3082 090 131, (which by the way doesn't match the # on the casting 3032 052 098). It is the correct pp for the car. I will need to machine the starter ring ID 3mm or purchase another. I guess that happens when you purchase from others and not the site host...........
Thanks for your help.
Old 07-17-2011, 05:47 PM
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Here are the numbers from Sachs:

3082 090 131:

PORSCHE
930.116.021.03


911
3.3 SC Turbo (221 kW ; 09/1977 - 06/1987)
3.3 Turbo (221 kW ; 06/1986 - 08/1989)
3.3 Turbo S (243 kW ; 09/1986 - 11/1990)

911 Targa
3.3 Turbo (221 kW ; 09/1986 - 11/1990)

3032 052 098 does not exist according Sachs. I have a Spec pressure plate, which has 3032 052 089, with increased clamping force...

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Roland

930 Turbo '81 Too many modifications to list
Old 07-17-2011, 11:00 PM
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