are running 750cc injectors going to make the car run crazy rich with a 1.7 or are they not going to be all that bad? im getting an SAFCII, just not for about a month or so. so are 750s even going to make much of a difference?

 

Yes they will make a difference. The Rtek 1.7 is made to run with 720cc secondaries only, and if you put in 750cc injectors your car will run pretty rich. Gas milage will be worse, and power levels will also. Think of it this way, the 1.7 runs the 720 secondaries like the stock 550's fuel wise so the actual fuel maps of the car are not changed, it just compensates for the larger injectors without the need for a seperate fuel controller to turn them down. If you throw in 750's the ECU will not be able to compensate for the 30cc in difference so you will run rich. (This is similar to putting 720cc secondaries in a car with a stock ecu but with a much smaller difference between injector flow rates.)