I have a set of 30lb injectors that are too big for my application, and i am wanting to go down to 24lbers. My Pro-M meter is cal. for 30#, if i go down one, do i need to get the meter cal. again, or will it be ok? Thanks!
Your meter will need a recalibration. Professional Mass Air systems can and will be able to recal the meter for around $100.00. These are the guys that left Pro-M to start their own company.... Daggar used to have a link in his sig
The reason is that the 24# units will not shoot as much fuel and the car won't run right if you used the 30# calibration for the MAF (very lean I would imagine)
I'm in the same boat...I believe I would actually gain with a 24lb injector in every category...better fuel delivery curve...and could possibly lead to a tick better performance.
Same here, i bought a set of 30's thinking it was the way to go. The car runs extremely rich at idle, enough to gag you, have to step on the throttle to get it to start, and it was fine with the 24's, i should have just left them in!
I know the only reason to get 30lb injectors on a h/c/i (n/a) is if you can have it tuned or have a high revving h/c/i, and it is still kind of questionable whether to get them.