318 engine differences between CA and 49 state versions
Changes from year to year. Agree with ^^^ In the master Tech booklets and elsewhere Chrysler wrote that the cam timing was slightly changed to trap more heat.
https://www.web.imperialclub.info/Repair/Lit/Master/See sessions from late '67 on engine and CAP and then '70 etc.
MY 1968 is the first production year for the LA 318. Shop Manuals show the differences in initial timing and distributor timing. None of it is really awful in terms of performance off idle. The big goals those early years was to reduce CO & HC at idle and under deceleration. Running the timing at idle a little late put more heat into the cylinder walls. This burns the mix more completely but hurts power. So comparing non-smog to smogged specs you'll notice idle rpms are slightly higher on smogged engines. So fuel consumption at stop lights and idling is slightly higher.
Below is graphed from the FSM specs and shows the most extreme differnces in timing from a CAP to a non CAP.
I don't know if any non-CAP 318 were sold in US cars that year.
Point is that timing was most different at idle, and pretty much the same above 1400 rpm.
With a manual transmission, the only power needed at idle is to overcome engine friction, turn the water pump, etc.
Changes from year to year. Agree with ^^^ In the master Tech booklets and elsewhere Chrysler wrote that the cam timing was slightly changed to trap more heat.
https://www.web.imperialclub.info/Repair/Lit/Master/See sessions from late '67 on engine and CAP and then '70 etc.
MY 1968 is the first production year for the LA 318. Shop Manuals show the differences in initial timing and distributor timing. None of it is really awful in terms of performance off idle. The big goals those early years was to reduce CO & HC at idle and under deceleration. Running the timing at idle a little late put more heat into the cylinder walls. This burns the mix more completely but hurts power. So comparing non-smog to smogged specs you'll notice idle rpms are slightly higher on smogged engines. So fuel consumption at stop lights and idling is slightly higher.
Below is graphed from the FSM specs and shows the most extreme differnces in timing from a CAP to a non CAP.
I don't know if any non-CAP 318 were sold in US cars that year.
Point is that timing was most different at idle, and pretty much the same above 1400 rpm.
With a manual transmission, the only power needed at idle is to overcome engine friction, turn the water pump, etc.