Dang wyrm..... you just helped me out. I had never looked for a catalog download from Howard's.. I just looked at the online offerings. When you mentioned the (15) footnote, I was scratching my head over that, but FINALLY saw the catalog download. Looking in the SBM flat hydraulics cams, I saw the 15 footnoted cams.
That makes it pretty clear about the .904 lifter cam lobes. Looking at a non-15 footnoted cam with intake duration of 269 and .050" duration of 215, lift is .455"... the normal standard stuff. Now looking at a 15 footnoted cam with intake 265 advertised duration. .050" duration is 218 but lift is way up to .502.... that is QUITE a difference. Even if the heads don't flow anymore at .500 lift than at .450 lift, they still will get to peak flow faster and hold it longer. Better than a VooDoo or XE.
It creates a new problem of how to accommodate all that lift in a simple build. Guess you back down to the 255 adv. duration one, and still get the same lift as the 262 VooDoo... same lift, maybe a tad less area under the curve so the top end is a few HP less but low end torque is up a bit. OK.... now the note for that 255 cam of "Best in 273-318" makes sense!
I am pretty good at digging into details but I missed that one altogether up to now. Thanks for bludgeoning that into my wee brain.
