Posted by Jim on January 26, 1999 at 15:28:24:
In Reply to: roller cams posted by jim martin on January 22, 1999 at 00:32:59:
: are they still around and are they up to the hype of 20 years ago.
Jim, they sure are still around and in 2 common types: hydraulic roller cams and solid roller cams.
For pure performance, with a modest amount of extra maintenance and a medium amount of prep machining work,
the solid roller cams are the ultimate in performance. A roller profile allows you to open and shut your valves with much more
aggressive profiles, adding mid-range and top end. The hydraulic roller is the best bet for a daily driver in that no adjustment is needed, and they
tend to be less noisy at startup too. Try "Desktop Dyno", a software package that allows you to try different engine internal combos
and is pretty realistic. Build a motor and try it with 3 cam types: hydraulic lifters, solid lifters and finally
roller lifters. Watch the power curve fatten big-time mid and top. The ZZx motors all have hydraulic roller cams.
Sallee Chevrolet is the best.
Regards,
Jim