As with most electronic boost control systems, the EVC IV consists of a cockpit-mounted controller and an underhood-mounted plastic solenoid box. Not only does this nifty feature eliminate boost creep, it also contributes to improved spool-up since the smart electronic controller knows exactly when to start pulling the reins on the wastegate. As one of the more sophisticated electronic boost control devices on the market, the EVC IV employs something known as 'fuzzy logic' to learn and compensate for a given wastegate's mechanical inefficiencies and non-linearities. The upside is that this modification is easy and really quite inexpensive.Įnter HKS's Electronic Valve Controller (EVC) IV. The downside is obvious you give up a little fuel capacity due to the space taken up by the foam material. This low-density foam is like a giant in-tank sponge designed to keep the fuel in one place. One such fix would be to fill our fuel tank with fuel cell foam. Fortunately, due to the ubiquitous nature of this problem, there are readily available solutions. As one can imagine, fuel slosh should best be avoided with high-output turbocharged powerplants. With tiny air bubbles in the fuel line, it's possible for the engine to run dangerously lean. Besides being terribly frustrating and joy-killing, fuel slosh can also be quite dangerous as it tends to 'bubble' the fuel right before it gets sucked up by the pump's pick-up. As bad as this is, it's nothing compared with our Subaru slosh-meister which runs dry during hard right-hand turns with anything less than one-half tank. For example, SCC's monster-powered Project RX-7 suffers from fuel slosh while making hard left turns with anything less than one-third tank of fuel.

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