The ideal vee angle to have ideal friction is 90°, cause no one is using 0°
(according to Steve Matchett, ex-mechanic), the ideal vee angle to reduce
vibration is 78°(according to ex-Renault engine guru, Jean Jaques His)
the best power output vee angle is between 72°and 78°
(according to Peter Wright, ex-F1 Technical Director).