cam question

[fiveoho]

218/226 @ .50

.500/.510


replacing 1.6's with 1.7's on the specs above, what would that change the lift and duration to? is there a formula to accuratly figure that?


thanks guys

 

[86bluecobra]

basically devide your lift by 1.6 then multiply by 1.7. it will change the lift but it shouldn't effect the duration much if at all.

 

[fiveoho]

basically devide your lift by 1.6 then multiply by 1.7. it will change the lift but it shouldn't effect the duration much if at all.

.531/.542 ?

duration the same




*the cam has a ls of 112. how would this do in a smaller NA stroker setup?

 

[S351Saleen77]

Duration will increase 1 to 2 degrees also when changing ratios. Hope this helps


To determine the change in lift when changing rocker arm ratios, divide the lift of the cam by the original rocker ratio (which gives you the lobe lift), then multiply this number by the new rocker ratio. For example, the stock Mustang 5.0L HO cam has .444” at the valve. Divide this number by the stock rocker ratio of 1.6 to get the lobe lift, .2775” and multiply by the new rocker ratio 1.72, to get the new lift of .477”.

 

[fiveoho]

Duration will increase 1 to 2 degrees also when changing ratios. Hope this helps


To determine the change in lift when changing rocker arm ratios, divide the lift of the cam by the original rocker ratio (which gives you the lobe lift), then multiply this number by the new rocker ratio. For example, the stock Mustang 5.0L HO cam has .444” at the valve. Divide this number by the stock rocker ratio of 1.6 to get the lobe lift, .2775” and multiply by the new rocker ratio 1.72, to get the new lift of .477”.

that does help. thanks man