desi

Here are the specs:

270H: 270/270 224/224 0.470/0.470 110 lsa 1800-5600 RPM (p/n 12-211-2)

270S: 270/270 224/224 0.468/0.468 110 lsa 1500-5500 RPM (p/n 12-222-4)

They look the same. What is the difference in the operating range due to? Is one more streetable than the other? Is solid (1500-5500 RPM) going to have more bottom end performance?

Little confused as to which one is more suitable for me? I don’t mind setting the lash once in a while, but isn’t hydraulic supposed to be more streetable (idle, vaccum, etc). The vehicle is only a weekend cruiser now, driven hard but not on the strip. Looking for bottom end torque, not high RPM power.

Opinions / advise appreciated.

comp

it's probably the ramp at the start of lift, i'd do the Hyd. less maintance
time there to put somewhere else

Solid LT1

You have to take into consideration the "lash" of a solid cam. I would use that cam in a 265 or 283 Chevy but go for a larger one in a 327-350 motor (talking about the solid lifter cam.)

desi

I will be using 1.6 rockers.....this is the largest cam I can go with. 0.500" lift.

Will the solid give me better off the line torque?

Solid LT1

Taking into account the reduced duration caused by the "lash" clearances, the soild would have more torque but, I would install the hydraulic for a 327-350 engine. The 224 duration is the same as the L79-L82 hydraulic camshafts (the L82 was a little different from the L79 350HP-327 cam.) I would not install this solid on a motor as the "short" duration defeats the reasoning behind going with a solid cam in the first place. The reason to install a solid cam and "live" with the maintenace requirements is for the increased high RPM performace of the solid, the "small" solid will not perform as well as the hydraulic cam you have posted, I wouln't install one in my motor. Years ago my good friend with a machine shop and I installed a "small" Comp Cams solid in his 67 SS350 Camaro (it was around 220@050 and 0.470 lift), it ran OK but the 350 was not as good of a performer as my 302 Z/28 with a Crower 238@050 solid cam. I could run away and hide from the SS350 with a smaller motor with far less torque! You have to remeber that the specs for the solid cam lift are at ZERO valve lash and not a "net" figure so you could run a 0.520" solid with a 0.020" lash specification if you are limited to under 0.500" lift for piston clearance. I would go with the hydraulic cam.