Yes, the MK IV models had a somewhat unusual "vacuum retard" system. There was vacuum only at idle. The point was to retard the timing at idle for emissions reduction. Any time your foot was on the gas, there was effectively no vacuum control of the timing.
If you have this type of carb, and you connect the vacuum port to a distributor with a normal vacuum advance, it will cause only trouble. Doug --- Luke Lewis <[EMAIL PROTECTED]> wrote: > Check where the port is open to. If it's open to > the inside of the > butterfly, it has max vacuum at idle. If the > butterfly passes it as it > opens, it doesn't get vacuum until you're under > load. _______________________________________________ Support Team.Net http://www.team.net/donate.html [email protected] http://autox.team.net/mailman/listinfo/spitfires http://www.team.net/archive
