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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,408
Garage
It is normal for the pipes to turn black under boost when the ratios dip into the low 12s or less. Proper cuising ratios (around 14) will burn grey.
The only way to be certain is to measure the A/F ratios, the pipe colors are only a rough guide.
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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 10-07-2007, 05:11 AM
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