Technical Cam Regrinding: Why the Pointy Lobes?

I agree,,,There is so much about cam set-ups and valve grinding procedure that 99% of these guys would be lost discussing it. I'd bet that none have ever thought that a flathead cam will flex like a torsion bar if using too strong of springs..same goes for using shims for spring height..they think if your springs need -040 shim on one spring,they all do.
send me your email address.

 

Will do. I'll send a pm, I am still stuck on an iPad.

 

No, why do you ask? (I don't want to hi-jack this thread) I'll PM you.

 

Just a quicky answer, I am just looking into the possibility of spray welding a desoto cam and re-grinding it, so I can run a flat tappet, but I am getting mixed messages on Speedtalk about issues with durability.

 

Why the pointy lobes, Spock?

 

Maybe the lobes are "Vulcanized"??

 

I have a friend that tried spray welding 20 years ago and gave up on it - the weld came off.

I'm guessing you need the "right" kind of cam metalurgy to start with, the "right" powder, the "right" spray method, and finally the right lobe lifter dynamic loading level (lobe profile). Even for pros, this combination has to be developed empirically for the most part. Would be easy to give up after 6 ruined engines/cams.

NOTE: I wouldn't be surprised if you got the base metal temp off by 200*, you might not get the correct adhesion. (or is it cohesion.) (And then there is the spray thickness - I'm sure issues there too.)