Yes..a SAFC will alter timing.. sometimes by a lot. It does not matter if you have a MAP or a MAF car. Basically if take % out .. i.e. stick bigger injectors in, you will be telling the computer that your map or maf voltage is lower than what it actually is reading. Basically the computer thinkgs that the motor is under less load if you decrease the MAP or MAF value. This is why it spits out less fuel.. and more timing. The lower the load value.. the less fuel and more timing the ECU will output.

In other words... get injectors that are not massivley bigger than stock.


Martin