I have a 77 FJ40, 2F rebuilt; has higher than normal compression (175 psi); desmogged, vacuum advance toyota distributor. It knocks only under uphill load but otherwise runs great.
Question 1: Timing is set where "Dot" is seen just above "Hashmark", like 1 mm. Does advancing the timing make the Dot go up or down with respect to the Hashmark?
Question 2: Does too advanced timing cause "Knock"? What about too retarded timing; can this cause knock?
Question 3: Does higher octane fuel fix knock and why?
Question 4: At factory specs 7 deg BTDC, is the dot even with the hashmark?
Question 5: Does turning the distributor clockwise advance or retard timing?
Question 6: With a higher compression engine, should the timing be advanced or retarded? Should higher octane fuel be used?
Question 7: Do you advance or retard the timing when driving at higher altitudes? (I live at 4000 feet).
I plugged the vacuum advance port and the engine still knocks under load.
Question 1: Timing is set where "Dot" is seen just above "Hashmark", like 1 mm. Does advancing the timing make the Dot go up or down with respect to the Hashmark?
Question 2: Does too advanced timing cause "Knock"? What about too retarded timing; can this cause knock?
Question 3: Does higher octane fuel fix knock and why?
Question 4: At factory specs 7 deg BTDC, is the dot even with the hashmark?
Question 5: Does turning the distributor clockwise advance or retard timing?
Question 6: With a higher compression engine, should the timing be advanced or retarded? Should higher octane fuel be used?
Question 7: Do you advance or retard the timing when driving at higher altitudes? (I live at 4000 feet).
I plugged the vacuum advance port and the engine still knocks under load.