16V revs - Alfa Romeo Forum
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Crazed 16V revs

Whats the safe max rpm a n engine can go to before the cam followers pump up? Will they taker higher rpm for short bursts? Anyone know which renault clio cam followers are used if you want to go to solid followers to allow higher revs?
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Re: 16V revs

I am under the impression that valve float at overrevving has more to do with the valve springs than with the tappets themselves. On the other hand, replacing the hydraulic tappets with mechanical ones will let you use camshafts with more duration, lift and overlap without erratic idling and reduced low rev performance but it won't affect high rev performance per se.

Please read this article on tappets where it states that:

Also the problem of valve float has for decades plagued high-rpm engines. This problem occurs when a valve spring cannot close the valve quickly enough at high engine rpm.
To achieve higher revs than stock with some safety you should replace your valve springs with harder ones or -better yet but way more expensive- your valves with lighter, sodium-cooled aftermarket ones. The harder the springs the more energy they steal from the engine.

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