the b series is meant to rev and rev quickly.....the h22a doesnt have to because of the extra .5 liter or so displacement...it has more torque, more hp, and a lot different powerband...maybe it's because the powerband of the b's usually go from nothing to peak in just a few rpms and the h22a's have a flatter "curve"....start higher and finish higher, but the difference isn't as drastic......maybe ur h is running on 3 cylinders...who knows.....can't fukkin wait til my jdmh22a is in my 90 lx accord....