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Old 12-22-2015 | 04:45 PM
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Default Motorsports AOS?
From everything I read part #99610792600 fits 2003 and up Boxsters, what are you guys (or your shops) installing? The guy that built my car apparently "doesn't believe in them" and thinks you should run lower oil levels. I don't share that opinion...
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Old 12-22-2015 | 05:16 PM
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I've had good luck with the standard AOS running normal oil level with deep sump.
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Old 12-22-2015 | 05:26 PM
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Gary, I run the 996 part you quoted, it made a significant difference in a high G LH turn like turn 6 @ WGI in my track prepped Cayman S.
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Old 12-22-2015 | 05:41 PM
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Originally Posted by Bill Lehman
Gary, I run the 996 part you quoted, it made a significant difference in a high G LH turn like turn 6 @ WGI in my track prepped Cayman S.
Thanks Bill, the big question is does it fit the 98-99 2.5L and if modifications are required. I've seen enough Boxster mosquito destroyers at the track to know I want no part of it! Not good for the intake system, plugs, or anything else as it also causes massive vacuum pressure in the block..
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Old 12-22-2015 | 07:19 PM
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Originally Posted by Bill Lehman
Gary, I run the 996 part you quoted, it made a significant difference in a high G LH turn like turn 6 @ WGI in my track prepped Cayman S.
I run one on my Cayman also. Haven't found I needed it on the SPB.
Probably not going fast enough..
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Old 12-22-2015 | 07:24 PM
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Gary, it takes extensive mods to put a motorsports AOS on the early Boxster. I don't know anyone in SPB who has done it.

Use a deep sump (LNE, Mantis, etc.), updated 997 sump a/o separators, put a fresh upper AOS on, and top the oil up. You will be fine.
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Old 12-22-2015 | 07:33 PM
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Got a deep sump lined up from Ernie, will follow your lead. What are the updated 997 sump AO separators? Thanks Matt!
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Old 12-22-2015 | 07:54 PM
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^ Gary, part number is 996.107.080.54 for the original "swirl pots" or sump air oil separators.

We changed to the 997 units. Not sure re. evidence that one is better than the other, but certainly consider replacing them while you are putting on a deep sump kit. These parts (there are 2 in the sump) are the first stage in de-aerating the oil.
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Old 12-22-2015 | 08:12 PM
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Matt - is the 997 part #996-107-026-51?
The 986 part is 996-107-023-04

This is what I come up with on Pelican.

997 Oil Separator --------- 986 Oil separator
Attached Images   
Last edited by Gary R.; 12-23-2015 at 08:25 PM.
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Old 12-22-2015 | 08:20 PM
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Found an in-place pic..
Attached Images  
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Old 12-23-2015 | 12:30 PM
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^ Yup, the second set of pics are the ones. Two in the sump. There's some debate over the 996 (original) design vs. 997 but either way it's probably a good idea to replace them while you're in there. Cheap insurance.
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Old 12-23-2015 | 06:30 PM
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Default sent you a pm
sent you a pm
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Old 12-23-2015 | 08:01 PM
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Originally Posted by jdistefa
^ Yup, the second set of pics are the ones. Two in the sump. There's some debate over the 996 (original) design vs. 997 but either way it's probably a good idea to replace them while you're in there. Cheap insurance.
DUH
Last edited by Gary R.; 12-23-2015 at 08:26 PM.
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Old 12-23-2015 | 08:06 PM
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Originally Posted by Gary R.
Is it me or do the parts pictures from a 986 and 997 look nothing like the pots in actual sump picture?
a) yes
b) no
c) stop drinking
d) start drinking
e) please rephrase your question in english
f) all the above
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Old 12-23-2015 | 08:17 PM
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Originally Posted by jdistefa
a) yes
b) no
c) stop drinking
d) start drinking
e) please rephrase your question in english
f) all the above
LOL...

Matt - Two sips into my bourbon so that isn't it..
Last edited by Gary R.; 01-04-2016 at 01:55 PM.
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