Camshafts: All else being equal, what does an increase in LIFT have on performance?

[1KoolBee]

More lift makes slightly more duration, and potentially significantly more flow, IF the heads can support more flow at more lift. Factory 906 head flow tended to stall at high lifts, limiting the benefits of 1.6 rockers or hi lift cams. I always found it interesting that a lot of old school cams like the crower monarch 300 cam was 300 degrees advertised duration and only .450 lift. Maybe Bruce knew something? That said, I love my Hughes cam in my 383 with pocket ported 906’s.

 

[gtxrt]

hyd. would need more lift to equal a solid because of the hyd. action...

yes at a higher rpm you lose lift but at low and mid lift you need to minus the lash off the lift of a solid lifter cam. solid 500 lift minus 15-20 for valve lash = 480 - 485 lift and that is for a tight lash cam.

 

[gtxrt]

Hughes cams are not as fast ramp as comp cams. Hughes cams have a very high lift to duration that is why I shy away from 1.6 rockers. comp cams have a very narrow spread between duration @ .050 and advertise duration more narrow than the Hughes cams. I ran a lot of both cams and Mopar cams over the years. Hughes cams seem to have a nice power curve all the way to high RPM. A similar Comp cams have faster ramps that will turn on faster at lower rpms, little better vacuum and idle and make more peaker TQ and HP and not as much at the very high RPMS. as best I can explain it. as you can see in the photo I prefer Comp. I am missing all 4 of the different Mopar cam cards and 3 Hughes cam cards because I never saved them back then.