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Posted

DFCO enabled means no fuel so it will be the maximum engine braking possible. 

When DFCO has not kicked in less timing will cause more engine braking as less timing means less torque. You can also try playing with cam timing (more vacuum means more friction) and reducing dashpot airflow will also increase vacuum. 

Experiment and see. 

Posted

Thanks Roland. Ive been playing with retarded timing, -10 deg under decel, which seems to offer good engine braking without too much pops and bangs, just some burble in the exhaust. I will see what a combination of dfco enabled will do also

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