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How much different are these two cams?

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Old Sep 6, 2007 | 02:11 PM
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cam1999's Avatar
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Default How much different are these two cams?

218/222 114lsa

and

215/232 .601/.579 LSA 119

The first I saw dyno'd 399/389 has 3.42's

mine is 365/347 with 4.10's

Is the LSA the key here?
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Old Sep 6, 2007 | 02:16 PM
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LSA deals with how sharp the inclines on the lobes are. The Lower the LSA the meaner it will sound, and I beleive you will se mainly torque gains from the lower LSA.
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Old Sep 6, 2007 | 04:11 PM
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Originally Posted by SDMForever
LSA deals with how sharp the inclines on the lobes are. The Lower the LSA the meaner it will sound, and I beleive you will se mainly torque gains from the lower LSA.
Man, that aint right! LSA = lobe separation angle. Its the angle (measured in cam degrees) between the centerline of the intake and exhaust lobes.

How close the .006, .050, and .200 durations are to one another gives you a general idea of how agressive the lobe is.

But yes, the tighter LSA might show a little more down low.
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Old Sep 6, 2007 | 05:22 PM
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Originally Posted by GuitsBoy
But yes, the tighter LSA might show a little more down low.


A lower LSA will also produce a choppy idle.
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Old Sep 6, 2007 | 05:45 PM
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im sure he had something else goin on.... 119 lsa is a stock lsa and unherd of (at least to me) in afterstock cams... idk why urs is that low, and, idk why that other one is so high, it seems weerd to me.
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Old Sep 6, 2007 | 06:01 PM
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I may have read my cam card wrong, its' 118.4 lsa if it matters

But still the big diff in numbers? The specs of both cars were quite similar except for the gears.

The 1st cam I listed, is in the CAM Only thread, theres a dyno graph that looks real good to me, lots of torque under the curve!


see https://ls1tech.com/forums/dynamometer-results-comparisons/219024-cam-only-dyno-thread.html

#16

Last edited by cam1999; Sep 6, 2007 at 06:41 PM.
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