Thread: Schizoid Boost
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RarlyL8 RarlyL8 is online now
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,563
O-rings are simple enough to change out. You may have one that is pinched or torn. When properly installed, secured and new they work fine. If anything moves around they will be the part to fail. Point is nothing should be moving around and if things are moving around they need attention.

One thing to consider is that once these O-rings fail they do not cure themselves. You get one good run and then lose 0.2bar on all susequent runs. Let the car sit and the process repeats. If the O-ring has failed the process should not repeat. If something is loose and the O-ring is sliding up and down it should not need to sit overnight to re-seat itself but would pop every time boost comes on and re-seat when off-boost. Yes strange things can happen but this is not typical.
I would change out the O-rings and see if you spot anything.
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 08-13-2010, 06:51 AM
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