what r u gonna use for the tuning purpose? go for the em at the very least, as the toyota ecu will retard the ignition timing as u lean out the fuel mixture ie u have control over the fueling and ignition at the same or it will be worthless. i usually tune on millennium motorsport's dyno, my machine gained around 35whp wit an safc2 + sitc on std setup. wudve been better if ive gotten an emanage.
Bump: forgot to mention, iam using a small 1.3liter turbocharged engine