Thanks all for posting all this cam data.
I’ve been trying to unravel this mystery for sure for years now, as have others.
Here are a couple threads from 12 years ago.
Was the c2az-a 406 cam actually DETUNED for 1962?
081118 thread “FE 1960 352 HP camshaft specifications”
https://www.fordfe.com/viewtopic.php?p=514063#p514063Note that in this link, Steve Christ (pg85) lists them all as .480 net lift, .286 lobe lift, 352HP and early 390HP, but strangely, .298 lobe and .500 net lift for the late 390HP and 406.
Per x4rdtech in #7, why would Ford have gone from 1-pc retainers in 1960 to the vanilla 2-pc grocery store retainers in 1961? Were they trying to get away with cheap parts and so detuned the cam for 1962? Or maybe that was not a 390HP engine.
Note also the Gas Ronda story. It is so rare to see that kind of courage.
081204 PART 2
https://www.fordfe.com/viewtopic.php?p=517166#p517166In this thread, Dennis posted the specs on the 352/360HP c0ae-b cam as having the same lift and events as the c3ae-d 427/410-4v cam, that is, 306 duration and .298 lobe lift.
So what’s with the .480 net lift cam?
Same thread, RJP notes that c2az-a with .480 net lift, (the initial 406 cam I’d guess) was also the SERVICE cam for the 352HP and 390HP.
I think it’s pretty clear that the c0ae-b was .298 lobe, .500 net, 306 advertised, same as the 427-4v cam, and used on the 352HP and 390HP. So was the c2az-a 406 cam actually DETUNED for 1962 to only .480 net lift with the c2az-a cam? As I noted already, you’d only lose a couple hp if the duration was kept the same (measured the same way!) so it would be a pretty invisible street backfit for service.
So I think the big issue now is, if the c2az-a 406 cam was .480 net lift, was the DURATION (eg at .050 .100 lobe etc) the same or was that detuned as well.
Maybe Dennis will appear and chime in with some vintage Ford engineering info eg specs on the c0ae-b and c2az-a to compare them!
EDIT, just found this thread from May 2007.
070514 thread, well it looks like Dennis already DID chime in, before the Nov-Dec 2008 threads:
https://www.fordfe.com/c2az-6250-a-has-anyone-heard-of-this-cam-t54635.html“tbolt2:C2AZ-6250-A converts to a C2AE-6250-A.
The specs on a the C2AE-A cam is same as C0AE-B, except induction hardened and oil quenched lobes.
The COAE-B cam is 306/306 deg, cam lift is .298355" x 1.76 ratio = .525" less lash is around .500".
Regards,
Dennis”
OK then where did the .480 net lift come from??? It’s not just in the Steve Christ book, it’s also in Bill Carroll’s FOOOOOORRD book pg 53-54.