Cam change based on heads?
Thread Starter
On The Tree
Joined: Jan 2006
Posts: 114
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Cam change based on heads? I have a 416ci LS3 with et performance cathedral port heads, a 122 supercharger and a custom ground flow tech cam. its been a great combination but have decided to upgrade to a tvs 2300 and ls3 style heads ( either scoggin dickey cnc ls3 or WCCH lsa heads) If i could have made the supercharger work on the old combination i would not be changing the heads or cam.....
What i am wondering is will the camshaft that was ground for the et performance cathedral port heads and a supercharger work or does the cam grind change drastically when LS3 style heads are installed. If the existing cam will work well then no sense in changing it but if i am sacrificing drivability or Hp or TQ then now is the time to order a new one.
Simply put- does the cam profile need to be changed when changing from cathedral port heads to square port heads?
Thoughts?
What i am wondering is will the camshaft that was ground for the et performance cathedral port heads and a supercharger work or does the cam grind change drastically when LS3 style heads are installed. If the existing cam will work well then no sense in changing it but if i am sacrificing drivability or Hp or TQ then now is the time to order a new one.
Simply put- does the cam profile need to be changed when changing from cathedral port heads to square port heads?
Thoughts?
Not saying your current cam wouldn't work well in the car but I think a cam that is designed for the heads you are putting on would be more efficent. I know Comp list many different cams based on what style head you have as they flow very different from older catherdral port stuff
Thread Starter
On The Tree
Joined: Jan 2006
Posts: 114
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These are the specs i have on the cam.
Lobe Lift: .360” .360”
Gross Valve Lift 1.70 Ratio: .612” .612”
Duration @ .050” Tappet Lift: 230* 240*
Lobe Separation: 116*
Recommended Intake Centerline: 113*
Specs at 113 Degree Intake Centerline:
Valve Timing at Open Close
.050” Tappet Lift: Intake: 2* BTDC 48* ABDC
Exhaust: 59* BBDC 1* ATDC
Lobe Lift: .360” .360”
Gross Valve Lift 1.70 Ratio: .612” .612”
Duration @ .050” Tappet Lift: 230* 240*
Lobe Separation: 116*
Recommended Intake Centerline: 113*
Specs at 113 Degree Intake Centerline:
Valve Timing at Open Close
.050” Tappet Lift: Intake: 2* BTDC 48* ABDC
Exhaust: 59* BBDC 1* ATDC
