Cam specs wrong?

Thunderbolt

Well-Known Member
I have data, incomplete, for a cam, can we figure out something from this specs?
I want to later compare this cam to an other cam, which i have the correct specs for.
I dont know how the duration is measured, but it is for an stock efi engine with catalytic converter, dont think its seat to seat, that would be more?

edit: duration is at 1.27mm

Intake:
dur 245.4
open btdc 7.7
close abdc 57.7
lift 11.37mm

exhaust
dur 236.2
bbdc 50.1
atdc 6.1
lift 10.65mm

Question:
LSA is stated 111, or is it???:rolleyes:
 
1.27mm is .050 lift

you may find these charts helpful


your timing is something close too the specs below, but I find it odd that the intake duration is significantly larger/longer than the exhaust duration\

intake
open btdc 19
close abdc 55

exhaust
dur 236.2
bbdc 54
atdc 2

lsadig.jpg
lclcomp.png


 
Last edited:
Found "cam motion timer" on google and could reverse enginer the LSA.
Turns out to be 113.5 LSA, retarded 1.5 degree.

Yes its a odd duration split, its a 4 banger cam, oem, could it be because it have a restricted intake manifold? or emission related?

The cam i want to compare it with is single pattern
dur 245.4
open btdc 10.7
close abdc 54.7
lift 11.37mm
LSA 112

Want more torque below 3000 rpm.
 
Back
Top