injectors and fpr

[Zorin]

89 325i vert.
I have mustang injectors (19.5) and adjustable fpr.
I know it needs to be at 3.5 bar for 19.5 injectors.
do i need to have a custom chip made or can i use stock software ?
next upgrade i am working on is m50 tb.

[digger]

stock is 3b and 14lb/hr.

you haven't said ur mods so how would we know?

[Zorin]

I know what stock is.
I am planning on installing said injectors with adjustable fpr and I want to know if if till be fine without chip tuning.
i have free flow exhaust and cone filter and m50 tb coming in.

[digger]

I know what stock is.
I am planning on installing said injectors with adjustable fpr and I want to know if if till be fine without chip tuning.
i have free flow exhaust and cone filter and m50 tb coming in.

Use some reconditioned stock injectors and stock 3b regulator. There is no need for those injectors or an adjustable FPR based on what you have said.

If you decide to use them then it is best to run a chip tuned to run those but it will still work without because you have an O2 sensor. Anytime you aren't in closed loop the engine will want to overfuel so it can mess with correction factors.