Quick dumb question

[foofopps]

I have stock injectors with Jim C chip, going to buy new injectors. Some people buy 17.5lb, I hear this requires no mod to ecu. Looking to buy 19lb ones but can I still use my current Jim C chip for stock injectors? I realized I won't have significant gains, but will this screw up air/fuel ratio or does motronic take care of all that.
My understanding is that they will work fine, I just won't be utilizing them to their full potential yet, but plan to eventually when I do more upgrades? Is this correct or am I an idiot? Thanks

[Wh33lhop]

Motronic will take care of your A/F ratio eventually, it might run rich for bit though. You may get a CEL at idle.

You're just about maxing out the duty cycle of stock 14# injectors with a stock, chipped motor. So bigger multi-pintle injectors will offer a better spray pattern, which equates to better fuel atomization, which will make the car run a bit better. You probably won't notice much though. If you start doing more stuff later on down the line, that's when you'll NEED the bigger injectors.

So basically, yes you're right.

[foofopps]

Thanks, how long would I be running rich like a few days? CEL wouldn't be a reaccuring thing though right, just for a couple days too then all would be good? Don't want to have CEL popping up on my DD.

[jlevie]

If the rest of the fuel system is in good operating condition there is no advantage to larger injectors unless you do something to significantly increase the mass flow through the engine. That would mean cams and a head port and polish or forced induction. No other, less invasive, mods will increase the mass flow enough to call for greater fuel flow.

[foofopps]

This is more of a maintenance issue and also being prepared for performance in the future. Replacing 23 year old injectors will probably make a difference in drivability.