Diesel turbo engine capacity equivalence

[windy]

Anyone recall what the engine equivalence for a diesel engine is?

I know the turbo rule is 1.4 multiplied by engine cc. What is the reduction for a diesel? 0.7?

So to get to the point what would a 1.9 turbo diesel engine's capacity be once the engine equivalence rules are applied?

Are the rules applied across the board at all MSA sanctioned events or is it only for those organising clubs that choose to put it in their supplementary regulations?

Thanks in advance