With Double VANOS, BMW is the only one producing motors with continuously variable timing on both the intake and exhaust sides. True, the profile of the cam doesn't change with VANOS like it does with VTEC, but currently VTEC only has two stages (though Honda has a three-stage design in the works).
Why is it that nobody is mentioning Valvetronic? Better throttle response even when compared to multiple throttle bodies (assuming the software is worth a crap... ahem!), more power, and better fuel economy all in one. It controls both timing AND lift steplessly, making it superior to VTEC.
IIRC Ferrari had SMG first... could be wrong there though.
--SONET
ChrisTO said:
so this would appear that Honda's VTEC is superior to that of BMW's VANOS since the VTEC varies lifting and timing while BMW only does the cam phasing. the website i posted explains it quite well.
- the M3 SMG or did Ferrari beat BMW to this one?