Thread: Ford flathead adjustable mushroom lifters mystery.
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Old 03-16-2026, 05:46 PM   #8
Bored&Stroked
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Default Re: Ford flathead adjustable mushroom lifters mystery.
Quote:
Originally Posted by GB SISSON View Post
What is the benefit? More surface area on the lobes?
The wider face allows a more aggressive opening ramp that uses the additional width to open the valve faster/sooner.
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