SPG9 AID [Archive] - SaabCentral Forums


2nd August 2002, 06:00 AM
1992 900S LPT with added intercooler. Does anyone know if SPG9 advanced ignition diaphragm improves things in an LPT?

Johann F
2nd August 2002, 07:55 AM
Probably not as the LPT vacuum unit has more retard (and brings it on more gradualy)than the older FPT units which the SPG9 is designed to replace. Try setting your basic timming to 18deg to improve low end pickup.