Cylinder Head

How do they modify a cylinderhead for more power?

As mentioned before, the basic rule is to give the engine better breathing. Some original cylinder heads can be very restrictive.

We have to look at a flow bench, how to ameliorate the airflow in the cylinder head.
We have to port the cylinder head , modify the valve seats and match the inlet- and exhaust manifold to the head.
A good modification of the valve seats, can sometimes give more gain than bigger valves on a normal valve seat.

Before you allow somebody to do that, it is important to make sure that the chosen person has a lot of experience in modifying cylinder heads. This to avoid that a lot of work has been done without any result. If he does not have the knowledge, it is much likely that he will destroy the head by grinding too much and passing through.


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