pegleg (8/13/2010)
I believe Mummert is having a repop of the 290 made, which he calls a blower cam. Probably with more modern lobe configurations though. John is extremely knowledgeable about cams, and if he sells it, it works.
My cam in a Engle which was ground on a new billet, but using more modern lobes and slightly more lobe seperation than the factory cam. It would check stock (290) as it must for pre stock. We cannot get these from Engle any more as they have no more Y block cores.
I still kind of think, and maybe Ted could verify, that some of the 56 cams and the 302 were ground by Isky and numbered by Ford for Nascar, well USAC. Can't prove it though. Maybe we should ask Ed, he's still around.
More factory high performance camshaft info:
The 1956 260 hp cam (recently discussed in the YBM - Randy Millard article) is an EDB-6250-B. The specs are 260/260 dur and .278"/.278" lobe lift (.398" @ 1.43 ratio)
The M-260 engine camshaft is an ECZ-6250-B. The specs originally were 257/257 duration .300 lobe lift, then shortly changed to 256/252 duration .294 lobe lift. (.429"/.420" @ 1.43 ratio)
The M-260 cam b/p specified "Hard Facing Alloy On Cam Lobes". It also specified "Engineering approval of samples from each supplier is required prior to authorization of part production". This would lead me to believe this cam was coming from an aftermarket supplier that utilized hard facing, ie. - Isky and others. It was the only cam I found that had these callouts. The other blower cams did not.
I think for production all the blower cams in 1957 were manufactured (ground) by Ford at one of their engine plant. For service it may be possible that cams were manufactured by an outside supplier.
Since the 292 were in cars through 1962 and in trucks until 1964, I don't think it would of been unreasonable for Ford to manufacture the blower service cams at their engine plant.
Re the stories on the Ford relabeled shipping tubes from an aftermarket cam supplier for blower? cams. If anyone has one of these shipping tubes or photos of it, it would be nice to see what exactly it says.
Regards,
Dennis