For what it is worth...most rev kits i have seen and it has been a
while.. have about 80 Lbs or so at the lifter with the valve open.. If
you devide that out by the rocker ratio.. 1.75 for arguments sake on an
intake.. you end up with about 45 more at the valve.. seems like a small
change with a roller cam..If I was hitting the retainers I would call
comp cams and ask them how much tension they want with the rocker ratio
you are running..I'll bet you are 'light' most of the stuff i have seen
if you are going to spin the thing sound like 300 on the seat and 850 to
950 open...Are the valves steel or Titanium?? makes a huge difference
there too lots of the new agressive grinds really need a Ti valve as
there are no spings that can control the weight of the steel stuff..
Dave Dahlgren
"Thomas E. Bryant" wrote:
>
> Larry,
>
> Where in Missouri do you reside. I grew up near Rockport in the
> northwest corner of the state.
>
> My first Chevy motor had a Chet Herbert cam, a good performer, but we
> eventually went to an Isky flat tappet, then Crane roller, and I now run
> a Competition Cam roller. I have run rev kits in the past, they do make
> a lot of sense, with a rev kit you can run less spring pressure on the
> valve. For some reason I quit using a rev kit, but I have just installed
> a new kit.
>
> After the World of Speed, upon inspection of the engine, I found that I
> had lost the intake guide seal on #6 cylinder. (We had installed valve
> spring pockets to keep the springs more stable after Speedweek because
> valve seals were broken up.) Upon further inspection, it was noted that
> the valve spring retainer had been clobbering the guide which simply
> meant valve float. So we will see if it helps at the Lakes in November.
>
> Tom, Redding CA - #216 D/GCC
> >
> > Hello list, does anybody use the rev kits with their camshaft anymore, I
> > never have used them and don"t know if they are any advantage or not. Also
> > does anybody have any experience with the Chet Herbert roller cams. We are
> > coming to Maxton for the last race to get some ideas and meet the people on
> > the list.
> > Thanks Larry
> > Show Me State Missouri
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