Originally Posted by GARETH T
increased valve overlap will lead to a high boost threshold, you sort of got what i was trying to say slightly wrong!
wide cam profile = more valve overlap= raised boost threshold,
to get over the raised boost threshold, which could increase lobe seperation, but then this equals raised peak power
the inlet benefit by having the cylinder creating a higher pressure difference across the inlet valve!
You may have lost me - sorry.
If I understand right.....
Wide cam profile = how long the valve us open (??). Is this the same as duration?
When wider, it means that the time when both valves are open is greater (?).
This raises the boost threshold - which is bad.
Boost threshold?
Must admit, I didnt get the bit about the inlet benefiting from the cylinder creating pressure difference accross the inlet valve.
Sorry for being thick
JJ