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What makes a cam lumpy?

shifty6

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Tight (small) Lobe separation angle will make it sound lumpy.
 

VR38

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Excess unburnt fuel (overlap) makes a cam lumpy on idle, tighter the LSA the tighter the lump will sound.
 

fdbag8

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I have a 113lsa cam in my l76 which has a nice choppy idle. As a daily it's plenty lumpy for me.
 

Cava454

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108 for me :)
 
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