qais_vtec
Member
- Joined
- Jul 15, 2012
- Messages
- 113
hi,
i have just received my new set of edelbrock 4730's for my b20v build and upon close inspection i have noticed that the intake lobes have a gradual (progressive) opening ramp rate and a steep closing ramp rate and its the complete opposite for the exhaust lobes where the opening rate is steep and a gradual closing rate.
is this normal?, what does that say about the characteristics of the cams in terms of rpm range and power delivery etc.?
specs as follows:
Advertised duration (in degrees): 288 Int/ 266 Exh
Duration at .050" lift (in degrees): 250 Int/ 232 Exh
Lift at cam: .316" Int/ .293" Exh
Lift at valve: .490" Int/ .454" Exh
Intake centerline (in degrees): 100
Lobe separation (in degrees): 104
Timing at .050" lift (in degrees):
Intake: 25 BTDC (open), 45 ABDC (closed)
Exhaust: 44 BBDC (open), 8 BTDC (closed).
i have just received my new set of edelbrock 4730's for my b20v build and upon close inspection i have noticed that the intake lobes have a gradual (progressive) opening ramp rate and a steep closing ramp rate and its the complete opposite for the exhaust lobes where the opening rate is steep and a gradual closing rate.
is this normal?, what does that say about the characteristics of the cams in terms of rpm range and power delivery etc.?
specs as follows:
Advertised duration (in degrees): 288 Int/ 266 Exh
Duration at .050" lift (in degrees): 250 Int/ 232 Exh
Lift at cam: .316" Int/ .293" Exh
Lift at valve: .490" Int/ .454" Exh
Intake centerline (in degrees): 100
Lobe separation (in degrees): 104
Timing at .050" lift (in degrees):
Intake: 25 BTDC (open), 45 ABDC (closed)
Exhaust: 44 BBDC (open), 8 BTDC (closed).