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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,556
I've searched but I'm still confused. I have a euro single pot distributor that I understand to be vacuum retard at idle/low rpm and mechanical advance above 4000 rpm. Does this pot have any other use throughout the rpm range? Does it serve any other purpose on a turbo engine? Is there an advantage/disadvantage to disconnecting it?
I sent you a copy of my shop notes for your distributor this morning which includes the curves.
To directly answer your questions as interpreted directly from the Porsche 1978 shop manual:
> The pot on the Euro distributor only functions as a vac retard at idle (950rpm +/- 50rpm).
> No, it does not serve any other purpose.
> Yes, disconnecting the idle vac retard will allow a bit better throttle response off idle.
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 03-30-2010, 06:38 AM
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