Upgrading Injectors

[GrndNatnl]

When you upgrade injectors, say from 30# to 42.5#'ers, how much do you compensate for in fuel pressure? Meaning if I run 44 psi static with the 30# injs, about how much reduction will I need in static FP with the 009's? Or is it really changed at all?

I've heard different takes on this from different people. I'm just looking for information to tune with once I toss my 009's in and get my chip recalibrated.

 

[John Wilde]

That would depend on your chip's programer.
You should not really have to make big changes in FP if you have a good chip guy ie;

Joe Lubrant @ Precision Turbo
Eric @ Turbo Tweak
Bob Bailey

 

[BLACK6PACK]

Your chip guy will tell you what fuel pressure to run. Most all smaller injectors (don't know about the big'uns) run about 42-45 psi of fuel pressure no matter the size.