773 Cams Duration and Lifts

[mayes]

Can anyone tell me what the lift and suration is for the 773 Rally Cams

 

[frank]

Can anyone tell me what the lift and suration is for the 773 Rally Cams

264/8.5mm maybe ?

 

[mayes]

thanks Frank I have come across an old thread and yes they are 264 and 9.09

 

[mph]

He is the correct timing spec for the 773 rally cams.When ordering and new or reprofiled cams you should get this information from the cam grinders.

773 Rally cam Spec Nissan Micra from Humphris Oxford Ltd www.humphrisoxford.co.uk - Matt

Timing Data
..................................................................................................Duration...........V/L................V/C................F/L...........LATDC

Inlet..........Open 26 BTDC....Close 58 ABDC.............................................264.............9.09mm...........0.210mm........106..........1.70mm

Exhaust.....Openn 58 BBDC....Close 26 ATDC.............................................264.............9.04mm..........0.254mm........106...........1.65mm

Rocker Ratio = 1.00 : 1

Overlap = 52 Deg

Timing = Valve timing figures, measured in crank degrees

Duration = Total duration, measured in crank degrees at end of ramp

VL = Valve lift measure in mm

FL = Valve full lift measured in crank degrees ATDC inlet, BTDC exhaust.

LATDC = Valve lift at top dead centre measured in mm