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heliolps2 heliolps2 is offline
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Join Date: Jan 2009
Location: DC
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I could be wrong but I think there should be two basic distributors.

Quote ; 911ST

Single Connection Pot
This should be Vacuum-Advance at curse, not at idle, and at speed the Vac-Advance goes away with acceleration and the loss of intake vacuum.

Double Connection Pot:
This would have Vacuum-Retard at idle, and Boost-Retard with on-boost acceleration.

If this is true one should never run without the vac-line connection on the single connection pot disconected.

On the Double Connection pot you might run without the Vac-Retard connected.

Again, I could be wrong on this.

I could see the possibility of a pot that has a single connection that might have 'both' Vac-Retard and Boost-Retard but not just Vac-Retard. Someone used to make a modified pot for a Turbo Charged Corvair that did this.

My yellow beast at an autocross
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SOLD, 911GT ,CIS, 428 fwhp 450 trq, Carrillo rods, 964 cams, TT retainers,7.5 comp 1.1 bar boost 320 ml black fuel head 009 injectors, 044 pumps, 60-1 T4/T3 dual scroll turbo

Last edited by heliolps2; 09-08-2011 at 02:14 PM..
Old 09-08-2011, 02:09 PM
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