[B20] kop vlakken (hoeveel?)

[Marc1970]

Van V-performance: The 10.5 - 1 CR of the E head is just too high for normal street use unless the engine is worn out, a radical cam is used, the combustion chamber is enlarged, or a special knock sensing ignition is used that will retard the timing when there is detonation. Don't rely on a thick head gasket to lower the compression ratio. The engine was designed for a particular distance between the piston and head. Adding .090 in gasket thickness alters this relationship and can have negative effects on combustion efficiency. An F head can be milled to get a higher than stock ratio. Remember that increasing the bore increases the compression ratio and this should be calculated any time you are modifying the engine and head. Around 9.5 to 1 seems to be a good compromise.

Er zijn ook wel mensen die de scherpe randen vlak naast de bougie weghalen, tegen 'hot spots'.