28-12-2020, 08:24 PM
I have run a standard Nippy Head, modified Ruby Head, and now use a Ricardo head as its the smoothest running head,
The Nippy head makes the engine harsh.
I tried a Whatmough Hewitt head but it would not fit over the valves both in diameter and lift without grinding work.
So for me its the Ricardo Head that works best on my engine which is a 2500 to 7000 engine that will not tickover under 1000rpm
Its in a road car used for speed hillclimbs.
The Nippy head makes the engine harsh.
I tried a Whatmough Hewitt head but it would not fit over the valves both in diameter and lift without grinding work.
So for me its the Ricardo Head that works best on my engine which is a 2500 to 7000 engine that will not tickover under 1000rpm
Its in a road car used for speed hillclimbs.