|
And another thing I have just noticed.
Make sure that you know what Bore adapter diameter is being used.
CNC list theirs on the flow figures sheets. They use 100mm.
If another company used a smaller diameter then it may start to mask the valves and lower the flow figures. It doesn't mean their head is worse it just means that if you don't have a 100mm bore the lower figure is more likely to be much closer to reality
For example the Duratec has a 87.5mm bore so 100mm is well in excess of this. Looking at the pictures on the web site this engine has such huge valves as standard that they are going to get masked really easy at 87.5mm.
|