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When I spoke with Cobb Tuning this morning, they felt that the max acheiveable boost with the stock pistons was around 5-6 psi, contingent upon using an intercooler. I chatted with them at length about the boost potential, and according to them, the situation with the SVX is very similar to the 2.5RS. Both are 10:1 CR motors, and the piston design is fairly similar. The two main failures that occur are 1) the high cylinder temps resulting from the very high pressures due to the 10:1 CR cause the edge of the piston to melt away, and 2) the high cylinder pressures, especially if detonation occurs, causes the ring lands to break. They weren't terribly excited about WI, but they felt an IC was definitely necessary.
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Mychailo
:: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ ::
1995 Laguna Blue SVX L AWD 5MT (sold)
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SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads.
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