This thread finally prompted me to hook up the MAF signal and tachometer signal to my LM-1 data logger. Below are the results for a WOT run that I made this morning on the way to work. The outside air temperature was about 82F, so there was a bit less oxygen than usual. The MAF is peaking right at around 4.5 volts in all four gears. According to Michael's plots, that leaves about 20% headroom for engine mods. But there should be at least 10% reserve for driving in cold temperatures where the air has about 10% greater density. So, realistically, the stock MAF does indeed have only about 10% headroom for engine mods which isn't much (only about 230*1.1 ~ 250 max HP).
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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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