Which Cam is Faster?

[skinny z]

And by faster I'm trying to define the terminology, "quicker lobes". Keep the lobe lift the same.

Example 1) 280 advertised duration with 219@ .050" or 280 advertised with 224@.050"?

Or conversely, example 2) 224@.050" and 276 advertised or 224@.050" with 272 advertised?

Advertised being expressed as .006" lift. Hydraulic rollers for the record.

[David Redszus]

And by faster I'm trying to define the terminology, "quicker lobes". Keep the lobe lift the same.

Example 1) 280 advertised duration with 219@ .050" or 280 advertised with 224@.050"?

Or conversely, example 2) 224@.050" and 276 advertised or 224@.050" with 272 advertised?

Advertised being expressed as .006" lift. Hydraulic rollers for the record.

Neither velocity nor acceleration can be determined from the supplied data.

[skinny z]

So 50 thou numbers don't mean anything?
I understand what you getting at but this is sort of a first glance determination.

[Stan Weiss]

If these are actual / real lobes then what are their 0.200" duration?

We can calculate average average velocity from 0.006" to 0.050" but that does not mean that the one with the higher average has the higher peak.

Stan

[Walter R. Malik]

And by faster I'm trying to define the terminology, "quicker lobes". Keep the lobe lift the same.

Example 1) 280 advertised duration with 219@ .050" or 280 advertised with 224@.050"?

Or conversely, example 2) 224@.050" and 276 advertised or 224@.050" with 272 advertised?

Advertised being expressed as .006" lift. Hydraulic rollers for the record.

Lobe profile to another lobe profile ... one can be faster in one part and the other can be faster somewhere else ... on both the opening and closing sides.
Mapping a simple "bell" curve will probably tell you something but, you have to have those camshafts in hand.

[Orr89rocz]

How bout this

Comp magnum hi lift. 280 adv. 224 at .050. 144 at .200” .350 lobe lift

Comp xfi lobe. 280 adv. 230 at .050”. 154 at .200”. .360 lobe lift

[Orr89rocz]

If these are actual / real lobes then what are their 0.200" duration?

We can calculate average average velocity from 0.006" to 0.050" but that does not mean that the one with the higher average has the higher peak.

Stan

Cam 1 is lingenfelters 219 cam for sbc. We know its 219/219 at .050 and .560” with 1.6” rockers. Not sure what it is at advertised but heard its 280

Other cam is theoretical but lets say it is like a comp xfi lobe. 274 adv 224 at .050 and 149 at .200”. I am pretty confident the Lingenfelter cam is less at .200”

[skinny z]

Reply deleted as I've seen the light!

[piston guy]

A "generality" is time versus distance tells you how fast you have to go to get there and back. If you have two cams that are 230*s @ .050 and one has a .300 lobe lift and the other .400 the iflter will have to go faster to go further and back in the same time. The exception would be a lobe with "dwell" at max lift like an NHRA stocker cam.