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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,410
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The schematic Bill posted shows the dual pot distributor. The idle timing vac source is controlled by a thermol time switch while the boost source is controlled throught a solenoid valve.
The distributor you have is an early Euro model having only one vac port which retards timing at idle using the source you have pictured and Jim has refered to. If you want to pick up a little throttle response off idle then cap both the source and the port.
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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 09-07-2011, 09:58 AM
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