21-01-2020, 06:55 PM
Hi,
The side valve Seven engine head choice is complex.
There are two directions to go in.
High Compression which reduces volumetric efficiency but good for torque at low revs.
Good breathing head, higher volumetric efficiency and the gains the ability to rev higher.
The ideal is to gain CR and have good breathing.
The use you put your Seven too will affect your choice.
My car runs better with a Ricardo Replica rather than with its original 9E head. ( My engine will run up to 6500 Rpm )
The Late Ruby head is also a good choice as mentioned by Chris KC
The side valve Seven engine head choice is complex.
There are two directions to go in.
High Compression which reduces volumetric efficiency but good for torque at low revs.
Good breathing head, higher volumetric efficiency and the gains the ability to rev higher.
The ideal is to gain CR and have good breathing.
The use you put your Seven too will affect your choice.
My car runs better with a Ricardo Replica rather than with its original 9E head. ( My engine will run up to 6500 Rpm )
The Late Ruby head is also a good choice as mentioned by Chris KC