Anyone know what they do exactly? Most of the more modified zeds getting over 400hp have these HKS Electronic Valve Controller (EVC) and HKS Vane Pressure Convertor (VPC)... what do they do?
EVC is just an electronic boost controller & VPC is an AFM substitute..... The EVC is self explained but here is a brief explanation on the VPC (to my knowledge only HKS made the VPC) The HKS VPC is designed to physically and electronically replace OE air metering devices which present a significant restriction to the intake system and offer no adjustment or reprogramming options to take advantage of dramatically higher air flow or larger fuel injectors. The VPC converts both air flow meter and air mass sensor systems to what is referred to as speed density systems by utilizing a 16 bit central processing unit reading its own intake air temperature sensor and absolute pressure transducer (B-MAP sensor) signals. This unique conversion feature not only allows the VPC to replace the factory air flow metering device, but also eliminates the need for a fuel cut defencer. Another benefit of the VPC is the ability to create our own programs to take advantage of larger fuel injectors and new air flow characteristics (larger turbos). In some specific instances, the VPC may be used in addition to the PFC F-Con and larger injectors for the ultimate in HKS plug-in fuel system technology. VPC equipped vehicles respond quicker with improved horsepower. Controls those monster injectors as well! (This was gleaned from a HKS supplier somewhere on the web, I don't remember where)[/COLOR=green] I hope this helps.
