[Stan Weiss]

Originally Posted by chiphead

So lets say I'm comparing two HR street cams from different mfgs. How useful is Hydraulic Intensity parameter to compare between them? I'm assuming the adv duration numbers are both taken at .004".

Cam A is a 219 at .050 with a HI of 51, and Cam B is a 224 at .050 with a HI of 54 on the intake side.

Cam A is 227 at .050 with a HI of 51, and Cam B is a 230 at 050 with a HI of 59 on exhaust side.

Assume .520 Lift and 112 LSA are the same for both. Which is going to make more streetable power 2000-5500 in a 400?

First:
Most of Comp Cams hydraulics are rated @ 0.006" lifter raise.
I believe Crower hydraulics are rated @ 0.004" lifter raise.
I believe UltraDyne hydraulics are rated @ 0.0045" lifter raise.
Anyone know about any of the other cam companies?

I would also look at the 0.200" duration as well.

Stan