More fun at Triple B's Muscle Car Clinic. This is the most beautiful 1965 Fastback I have seen. Rangoon Red with white interior. Four speed and the underside is just as pretty.
Tuning challenge for Rob as owner had engine builder but in a "mild cam". Well, not so mild. Engine is all stock and running through an Autolite 4100 carb. Air screws completely closed with no effect. 5 inches of vacuum with the power valve full in dumping mo gas. Run you right out of the garage. Cloud of unburnt gas out the pipes!
All parts ok and no vacuum leaks. A typical set up for too much demand on the primary side of the carb with the curb idle open to far and off the transfer slots negating the idle mix screws.
I cracked the secondary stop in 1.5 turns to open the secondary side of the carb. Was able to close the primary side down two turns. Idle mix screws now work and was ale to open them to 1/2 turn. Got engine up to 11 inches of vacuum at 900 rpm and also advanced the initial timing from 6 BTDC to 14 BTDC. No pinging and great performance.
Car runs like a top! She is beautiful!!