jetsetter
Registered
I believe the problem is that the second set of injectors don't just "join the party", they take over and the first set operate at a reduced capacity. That means doubling what they are doing by going to 200% is not really giving you much flexibility, in the area where you need the fuel most. The simple fact is, flashing the ECU is better and cheaper in every sense. The only reason piggyback setups were ever invented was because the ability to flash wasn't there. Now it is.