Merlins Ralliart and EvoX TUNING GUIDE Version K.pdf - EvoScan

MERLINS RALLIART & EVOLUTION-X TUNING GUIDE9.02-BOOST CONTROL – PILLS, BOVS & PLUMBINGThe stock boost control equipment as fitted to the EVO X and RALLIART definitelyhas some tuning restrictions, whether you hit them will depend on how muchhorsepower you are targeting.The first item of priority will be the limitations imposed by the stock boost controlsolenoid (BCS) setup. The RALLIART has one BCS while the EVO X has two BCS,giving it a bit more capability. In both cases, the first modification is to change theBCS pill. This is a small brass restrictor fitted into the BCS hose before the Teejunction. Its job is to reduce the total air flow through the solenoids, giving them abetter range of tuning adjustment.See the pix below on the BCS hose and pill arrangement from GST MotorSports,check them out at: http://www.gstmotorsports.comGST can supply a suitable new pill at reasonable cost.Figure 44:BOOST TUNING – WASTEGATE ACTUATOR HOSE & PILL SETUP,EVO XREV: 0.K merlin@three.com.au Page 74 of 134