Back on the subject of the Slant Six Whiplash cams from Hughes,,
At last springs Indy Cylinder Head swap meet, March of 2020. I stopped by the Hughes booth and spoke with Dave. He told me that the Whiplash slant six cams use Mopar cam lobe masters that are designed to operate with the Mopar .903 diameter lifter. Dave mentioned that he has other Mopar cam lob masters and could custom grind other lifts and durations into slant six cams.
Using a Mopar lob should give the valve a faster opening ramp than a lob designed for a Chevy lifter, as Chevy lifters are smaller. Faster valve opening will allow the engine to breath better.
I believe what Doug’s RV 10 and RV 15 cams had going for them was they used Mopar cam lobes. I also believe that Erson ‘lost’ the Mopar lobes, and that is why Erson no longer offers Dougs original RV grinds.
I would be willing to bet that the lobs that Oregon grinds into their version of Doug’s slant six RV cams are Chevy masters and do not take advantage of the larger Mopar lifter diameter.
And Rusty, look at how those Hughes Wiplash cams have the lash specified.
That is tighter than most mechanical cams. Removing lash will get the valve opening sooner and closing later, that action won’t show up in the duration at .050 numbers. Not saying it’s a good idea to lash that tightly, but when I asked Dave about it he said it is working and they have seen no issues.
