Parity Review Has Been Called

[V8 Fireworks]

Originally Posted by Casper

In your opinion, how would a different builder change both the power and torque curve of the Ford as every four valve motor has these characteristics are part of the reason four valves/OHC are used. As far as I know it is impossible to change but maybe you can show the engine designers of this world how it can be done but I won't hold my breath waiting.

If you wanted to make a four-valve engine perform worse like a two-valve engine, you could make the valve area smaller and ports smaller?

So they could cast a special "non-performance" cylinder head with smaller valves and smaller ports than normal, for reduced air flow?

That should give you all the two-valve problems like needing a lot more cam lift to get the same amount of airflow and all those things, presumably?

However you would still have better cam & valve spring stability as your intake lift would be spread over two valves instead of one, as well as less inertia due to not having pushrods, which would be a shame. Darn 4-valve & 5-valve DOHC layouts and their superiority over 2-valve pushrods.