Did I get screwed?

[jivepepper]

Almost everyone was using those HP 292 regrind cams a few years as they were the only thing around. How much did you pay? I usually see them go for @ $250-300 used.

I purchased them for 225.00.

I just purchased my billets 292s. I seen some sweet deals on regrinds I just wanted new billets. I was tempted because I usually do things on budget.

 

[LaserRed01GT]

What are the actual specs on these "292 re-grinds"?

LSA, @.050, lift, and ICL? Are these symmetrical lobes or asymmetrical?

 

[jivepepper]

What are the actual specs on these "292 re-grinds"?

LSA, @.050, lift, and ICL? Are these symmetrical lobes or asymmetrical?

Lsa 114 531 lift 292 advertised duration. But if my research it's 240 duration at .050 . Just by looking at it I say they are symmetrical. If you go to over mod depot and corral, and you do a search on houston performance cams you'll find more info. Best I can do sorry I'm a dumbass

 

[Trav4011]

From that picture those are clearly not factory lobes. I can tell by the nose radius and lift alone. Those don't appear to be welded lobes but rather a PM(powdered metal) lobe that has been diffusion bonded to the core by means of heat. Some of the factory Ford camshafts are done this way and some are manufactured with the process that MBDiagMan descibed. But these are processes only used by Ford, not aftermarket cam manufacturers.

All the modular camshafts that are produced by aftermarket companies such as Comp, Crane, and Crower machine and grind our cams from one big chunk of round bar stock...billet. These companies also make cast camshafts that are finish ground, but all of the aftermarket modular cams by these companies are billet. And I know at least Comp, Crower, and Crane do not re-grind factory camshafts and have never done so. The modular camshafts from them have always been billet.

If I were you, I would go spend $30-$50 bucks and take your cams to somebody local that has a Cam Doctor or Cam Pro. They will run both cams through the machine and give you a very accuarate cam specification card. This way when you degree the camshafts you will know the cam specs.

BTW the flank is the uppermost part of the ramps closest to the top of the nose radius (peak lift). The heel is the bottom of the base circle. To measure lift, first measure with a caliper the width of the base circle, and then measure from the center of the heel to the peak of the nose radius and subtract the difference.

View attachment 407815

It's also known as "spray welding".. it works pretty well.. My buddy owns a spray welding facility, here in South Louisiana (oil field related). He welds up crankshafts for large diesel engines and air compressors.

I'm not sure if that process is utilized for these particular camshafts.. either way, it should be fine. I've got the cams over at a local speed shop, and they are going to toss them on the cam doctor for me.


Travis

 

[LaserRed01GT]

Pulsed arc welding (spray welding) is very light duty welding such as sheet metal and light pipe, and it can also be used to repair small cracks on stuff like heads and cranks. These lobes are not attached to the core by pulsed arc welds.

About 3-4 years ago, Factory camshafts made by Ford were made by taking a casr core, machining the core, then slipping a powered metal lobe over the core and heating it to a specific temperature. This bonded the lobes to the core and was called diffusion bonding. The new process that Ford uses is the where they slide the lobes over the core and force a ball through the middle of the core effectively press-fitting the lobes onto the core. To the best of my knowledge, Ford is the only ones doing this.

Please post the results of the cam doctor when you get them. It will be interesting to see the results.

 

['01 Steed]

Great illustration, LaserRed01GT!!