Nah i think it will be for the mk2b one. 10bhp from a map on an NA is good with nothing else done. With a GSR you might gain a bit more power and torque from it but impossible to say! Most 1.4 engines from the mk2b see 120bhp with a map, exhaust and induction so i think this would be maximum available to you. Some ecus just cant be cracked. Like the ECU in the mk2 HGT that has never been cracked and probably never will without it costing silly amounts of money.