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Old 02-20-2013, 03:36 PM
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vinniekq2 vinniekq2 is offline
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When you talk about lazy performance,the first thing I think of is a long duration flat tappet hydraulic,

they idle quite rough and just dont respond as quickly with just off idle throttle response compared to solid flat tappet
Then the top end of a flat tappet hydraulic rolls off at a lower peak rpm and are usually limited to 6500 rpm as far as making good power.
the lobes are more aggressive in a solid lobe and even more aggressive with a roller.

mid range power say 2k - 5500 is about the same with a hydraulic flat tappet and an equal solid

the solid just has a little more on the bottom and a little more on top.

hydraulic cams work good enough for 75% of the people
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