ORIGINAL: earlwb
One thing I noticed with the model diesel engines is that they tend to cool off when you go to low throttle with a RC version. Then when you go back to WOT you have to wait for the engine to heat up and start running faster and faster. So you have to be careful of the needle valve adjustments, compression etc.
When I set compression there is usually a flat spot where more compression does not yield more RPM then further increase causes RPM to drop off. For CL I use the low end just before it drops off but for throttle use the higher end will usually keep the heat up so it will recover faster when the throttle is moved from slow to fast.
How effective this is depends on engine and fuel of course. Give it a try.
George