SOI Advice

[Unilevers]

typically most trucks under heavy load run 1-3.5 in the SOI tables. A max (and slightly risky) would be 8 degrees BTDC total which would give you 4.5 on the increment to be there. Personally i would run the increment down to 2-3 to give you more of a safe margin and a total BTDC of 5ish.

if you are unsure of the driver and loads run a 0 increment to be on the safe side. a running engine is better than i blowed up efficient one.

my 0.02c