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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,308
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You might be OK now. The -153 should be set ~13.0-13.5 AFR at idle as a starting point. Cruise should be ~14.0-14.5 AFR. Light throttle will knock it down to idle readings. Boost enrichment begins at ~0.3bar with a steep pressure drop. AFR will climb out steadily to redline. Every engine runs a bit different and there is a sweet spot idle AFR. You'll have to find that with your new combo. If you decide to try the aluminum -145 Fuel Head the Lambda system must be removed.
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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 01-20-2014, 05:03 AM
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