Thumper

Aj - instead of the old 284H how about the Engle K 56
a 270 size MP
or the Purple Plus
for cams under .500
you can get a lot more power/ area/ duration @.200
Actually those thumper lobes look like good ones for the under .500 builds if you could get them ground for power instead of lope
How high do you have to rev them to get the exhaust cleaned out of the combustion chamber at overlap?
no way would I want to use one with stock exhaust- under load they manifolds will glow cherry red just like they do with a 440 magnum cam

me I'd go with the 275HL or the Howard or Lunati listed in post 7 instead of the smaller thumper
The ones in post 23 would all act bigger

Thanks PRH I missed that thread must be senile cus I later commented in it I was thinking of some old speedtalk threads where Harold discusses his time at comp
love the parts about close brutality and noise- glad they are not Harold designs
do not like that comp 268 anywhere and especially in a Mopar
Harold said his 268 chevy voodoo is up 25 hp over the comp 268
so I would think the Mopar voodoo even more so
what comp line did Harold design? In the other thread he says "268 High Energy."
now I have to wonder which one he compares to his Lunati - dosen't matter the Lunati is a better cam

edit
I evidently mixed up the HE and XE cams
There was one that we would not use with chamfered lifters or with less than good lifter bores- must have bee the Billy Extreme Energy
the other one was about as smooth as a Crane
note Evienly comp developed the Thumper lobes for endurance racing- lobe makes sense there I highly doubt they used that intake/ exhaust split and LCA though