Flat heads can't get more lift.

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Posted by chriscase [75.36.32.237] on Wednesday, June 20, 2012 at 21:35:24 :

In Reply to: Re: Dyno run, Dodge 230 flat head- After, 60.41 hp posted by Kaegi [24.16.253.154] on Wednesday, June 20, 2012 at 16:52:29 :

Improvements would all be in duration. I guestimated that the 230 has 6° negative duration.

But you are sort of correct about valves floating at higher speeds. But modern engines have 70 pounds of spring pressure, 230s have 35.


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