Questions on ramp rate and duration/lift

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Jan 6, 2007 | 05:11 PM

eLTwerker

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From: Metairie, LA

Questions on ramp rate and duration/lift

Is there a way to find duration at .006, knowing duration and lift at .050? Also, can ramp rate be found using duration and lift at .050?

Jan 6, 2007 | 06:34 PM

andereck

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No, there isn't. Why?

Jan 12, 2007 | 02:39 AM

thehammer69

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From: Goose Creek, SC

Quote:

Originally Posted by r351winner

If you know the advertised duration (.006) of a cam you can calculate the ramp rate. take the duration @.006 and subtract it from the duration @ .050. A number of 53 or higher denotes an XE lobe or other mild lobe and a number of 49 or lower denotes an XE-R lobe or other aggressive lobe

That may work for the XE versus XER comparison, but it doesn't always work when comparing other lobe types. An example would be an XER cam and a LSK cam. They both have the same numbers for .006 and .050 but the numbers above .050 have more duration on the LSK lobes than the XER lobes.

Here's an example:

XER 224/228 .581/.588
...........006 .050 .200
Intake: 273 224 146
exhaust: 277 228 149

LSK 224/228 .637/.639
Intake: 273 224 149
Exhaust 277 228 143

Hammer

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