Low load cruising can use more ignition advance (this will give better mpg)... but be sure it is low load since in 6th gear it is very easy to go to high load.
Low load cruising can use more ignition advance (this will give better mpg)... but be sure it is low load since in 6th gear it is very easy to go to high load.
dyno can tell you what the timing you need , for ls1 engines with big overlap cams 22~26 timing work for me