Single or Dual Pattern Cam
You mean, the rocker ratio? Man, that's Slick!
Yes, rocker ratio’s split between intake and exhaust. Guys would use the 1.6 on the exhaust for a little extra lift and a smidge of duration. If your car picked up a little, then it was a close to perfect cam for the combo, or if it picked up a lot, then the cam was to small.
Once in a while, guys would do the reverse, 1.6 intake, 1.5 exhaust and see what happens.
It wasn’t long after that the split pattern cams exploded in the catalogs and became popular.
People try all sorts of stuff.
I had a pretty radical street cam, A Hyd. single pattern, an old time Crane ground on a 106. After messing with the rocker ratios, I used Rhodes lifters only on the intake lobes.
Now if the combo was good to begin with, I wouldn’t have done this move but it did mello the idle & help the car be a bit better around town lowering the rpm range of the cam.
The real power in the cam rpm wise was after 3200 easy. Since the Rhodes lifters pump up by then, I say it wasn’t a big deal in WOT performance since I was ignoring everything under 3500 as far as torque was concerned with that cam being used, but around town, the Rhodes lifters helped out a lot.
It was a band-aid fix that worked great.