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RarlyL8 RarlyL8 is offline
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,521
Unfortunately the Gunson is not the proper tool to check the A/F ratios on boost, it only works at idle. You need an LM-1 or similar device to check the ratios throughout the RPM range.

Boost creep can come from different sources. The inacuracy that you are referring to is a design issue. The volume and speed of the boost signal overcome the waste gate's ability to read it instantly. This is likely due to the branch off of the exhaust that feeds the waste gate not being an optimum angle (such as a y vs a T).
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 10-22-2007, 07:41 PM
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