[Pete]

Winfield cams being among the first ones around are probably the most pirated ones in existence. Over the years I have had at least 15 different cams stamped SU1A come through the shop. Only 3 were genuine Winfield ground by Ed himself.
I ran one of those at Bonneville in 1953 and turned 129. The same engine with a 404A the next year turned 137.
Of all of the pirated ones some were of the same timing and lift and several were totally different. Who knows what they were. One thing all of them including the real ones had in common, they were duds as far as a high performance cam.
Not even a good street cam unless you like a super lumpy idle.
All of the originals I checked were 280 or more duration. Way too much for a NORMAL street engine.

Here are some of the ones I checked over the years.

SU1A (One of the many)

In 28-72
Ex 69-26
In .355 lift
Ex .330 lift
In .012
Ex .014
Velocity .004
Lobe seperation 112


Winfield SU1A (1953) (Another one of many)
360 lift 280 duration on the intake 28-72
360 lift 286 duration on the ex. 74-32
111 degree lobe separation

SU1A (1953) Yet another.
In 28-72
Ex 71-29
Lift .355
Lobe sep. 111
Velocity .005