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Power estimate 406?

950 Views 5 Replies 4 Participants Last post by  DZAUTO
Ok heres the combo:
406 small block
10:5 cr
280H comp magnum
roller tip rockers
demon carb
weind dual plane intake
hooker header
2 chamber flowmaster
stock heads 194 * for now open to sugestions on what to run

what kind of power do you think i'll make the way it sits? and after a head swap to a nice free flowing set of heads? Thanks
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I built a 8.5:1 406 with Comp 268H cam, Performer intake and Hooker headers. It was less than spectacular. I later took the heads off and had 2.02/1.60 valves installed and it made a huge difference. Power was up where I expected it to be. IMO, don't bother with small valve heads on a 400. You would be leaving a lot of hp on the table.
1 - 1 of 6 Posts