Quote:
Originally Posted by V8 Fireworks
And that explains why V8 series Feraris have always had pushrod V8s since the 308 GTS was interested in 1975... Oh wait, no they don't. 
4 and 5 valve layouts can apparently make more power for a given displacement. Furthermore, it allows independent variable cam phasing of intake and exhaust cam. Finally, variable valve lift (Honda's VTEC or Ferrari's three dimensional cam profile (can slide the whole camshaft left and right)) is impossible on a single camshaft pushrod engine... A hot cam LS is lumpy even at idle, instead of being able to engage the high-lift cam only when required like a Honda or Ferrari engine.
Of course the latter two technologies are prohibited in V8 Supercars, which negates some of the advantages of a DOHC layout.
PS. The main reason a LS has more torque than a Coyote is because it's a 20% bigger displacement, it ruddy well should have more torque... |
Still waiting for the vtec to kick in.
It is a nonsense argument to talk about 4V being high tech. It isnt. Is the DOHC 24V VCT motor in my FGX any more high tech than the same motor with VCT, SOHC and 12 valves in an AU? Not really. But it is usefully more powerful.