many thanks for these information, but The race of 24 hours of rouen is under UIM control, and I must run with "standart "engine, no free engine...with all modification allowed....

I need "only" more 25/30hp with 500/1000 rpm, and so modify the oil deliver volum control of the Di Oiler?I need more lubrification during the 2 straight line (1800meters)with full rpm to avoid the damage engine.

some ideas?