Ran across the card for my Pinto 2.0. It is an Engle "55", a turbo grind. The biggest difference between turbo grinds and NA grinds seems to be the Lobe Center. Turbo cams tend to be wider. Thought some of you might enjoy comparing it to the Ford stock cam. The Ford cam data is from David Vizard's "How to Modify Ford S.O.H.C. Engines".
The first number is for the Ford cam, second is the Engle cam.
Duration, off the seat 268 - 256
Lift .387" - .432"
Lobe centers 113* - 114*
From this, a person would think there is not much difference between the grinds. The stock cam even has more "duration"!.
But look at the .050" numbers:
Duration 202* - 223*
Intake opens 7* ATDC - 1*BTDC
Intake closes 33 ABDC - 42* ABDC
Ex opens 39*BBDC - 49* BBDC
Ex closes 13*BTDC - 6* BTDC
As you can see, at .050" the cams have nothing in common. Moral of the story, the "advertised" duration means nothing.
This cam is supposed to have a good idle and pull good to 6000. Time will tell. One thing I do know for sure, buying the cam from Engle was a real pleasure. They have a lot of grinds that are not in their catalog, this one one isn't. More or less told them I wanted a good street turbo grind. The price and delivery were outstanding.
I also got the impression they will grind anything you want, no guarantee as to performance!
Bill
The first number is for the Ford cam, second is the Engle cam.
Duration, off the seat 268 - 256
Lift .387" - .432"
Lobe centers 113* - 114*
From this, a person would think there is not much difference between the grinds. The stock cam even has more "duration"!.
But look at the .050" numbers:
Duration 202* - 223*
Intake opens 7* ATDC - 1*BTDC
Intake closes 33 ABDC - 42* ABDC
Ex opens 39*BBDC - 49* BBDC
Ex closes 13*BTDC - 6* BTDC
As you can see, at .050" the cams have nothing in common. Moral of the story, the "advertised" duration means nothing.
This cam is supposed to have a good idle and pull good to 6000. Time will tell. One thing I do know for sure, buying the cam from Engle was a real pleasure. They have a lot of grinds that are not in their catalog, this one one isn't. More or less told them I wanted a good street turbo grind. The price and delivery were outstanding.
I also got the impression they will grind anything you want, no guarantee as to performance!
Bill