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RarlyL8 RarlyL8 is offline
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 14,081
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If you have a 1.0bar spring but are only seeing 0.8bar you have a boost leak, which would manifest itself the way you describe. Generally it is caused by a faulty O-ring on the intercooler or throttle body.

The overboost protection switch kicks in at 1.1-1.2bar, close enough to sometimes cause issue when using a 1.0bar spring.
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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 03-15-2007, 10:02 AM
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