Did I get screwed on injectors?

[1fast97gsx]

I bought a set of "RC 650s" from a local dsmer last year. They were supposedly 650s balanced, flowtested, and low miles ( like 2k ). Well I put them in my car and mess with my safc and my low settings are like -3 across the board. High settings however are -24 or so up top. I know it sounds really strange ... but if I lean out the lows more the car runs horrible and the O2 stays pegged at lean. I bought the car with an upgraded fuel pump ( 190 lph I'm assuming ) .. but the engine I just persoanlly fully rebuilt and everything is running really good. Even with a stock fuel pump my settings shouldn't be this low for 650s right? How can I tell what size the injector really is without actually taking it to a shop and paying for flowtesting? I don't see numbers anywhere on them... Sorry for all the questions, but I need to figure out if my fuel pump is just too weak or if I got ripped on the injectors.

 

[bigjangin]

was the engine running "really good" before you swapped injectors? Did you do any other mods at the time? Even with 550's -3 on the afc sounds a bit off.

 

[CanadianTSi]

Is your MAS hacked?

 

[1fast97gsx]

no thats just the thing .. I did a COMPLETE rebuild on the motor and both before and after the safc settings are like this. The MAS is NOT hacked. I had messed with it once like a year ago, but I changed it back to stock. ( Screw is turned back in ... unless maybe it's really sensative and I don't have it in all the way? ) Either way I don't think a hacked MAS is the problem, and the motor is in PERFECT shape ... only like 750 miles on it.

 

[1fast97gsx]

was the engine running "really good" before you swapped injectors? Did you do any other mods at the time? Even with 550's -3 on the afc sounds a bit off.

Yea engine was running awesome on stock injectors. I swapped these on about a year ago and noticed the goofy low settings. High settings are at -25 or so. I want to put the stockers back on and get rid of these and get some new ones ... but I sold my stockers like a year ago.