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Back to Back Dyno Test PI 215s & Ai CNCd GM 5.3

Old 08-21-2014, 10:09 AM
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Likely LS7.
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Old 08-24-2014, 03:34 PM
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Originally Posted by JIMS SVT View Post
What lifters was used in these setups? Kinda curious as to why the power kinda goes flat around 6000ish. Mine did the same thing and I don't think its right.
Usually that's more of a valve control issue from not enough spring pressure. The OP's cam was on LSL lobes which need a lot of spring to keep the valves stable past 6k.

My build was identical, but I went with AI's less aggressive lobes, ran single PSI beehives, and mine was stable right up to the 6800 rev limiter.

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