Originally Posted by JCunningham

Pink injectors at 408kPa (4.08bar ~ 59psi): 5.599121 g/sec ~ 44.438213 lb/hr
Stock injectors at 408kPa (4.08bar ~ 59psi): 6.355956 g/sec ~ 50.444941 lb/hr

Originally Posted by Area47

12.5 under boost isn't a bright idea.

Originally Posted by splinter

Seems odd to my way of thinking that a supercharger vendor would furnish injectors supplying less fuel than the OE hardware.

Originally Posted by Area47

12.5 under boost isn't a bright idea.

Originally Posted by 03sierraslt

Exactly, maybe at 2-3 psi in throttle transitions but anymore and it needs to be in high 11's. once you start getting around 10psi I would shoot for 11.5 or so especially considering the ethanol content in fuel having a stoich even richer. I have found next to no power differance between 11.4-11.8 so IMO its not worth pushing it but rather leave yourself a little safety margin.

Originally Posted by Boober

The 6.2 flex fuel injectors are around 50 pounds per hour at 58psi. I dont know how to get a jpeg of the flow rate vs rail pressure Table in my stock tune but i can tell you 100% that 50#@58psi is what it shows. I'm not sure what the 5.3 flex fuel injectors are but I've heard they are lower. 58psi=4 bar, 43.5psi= 3 bar

Btw....your stock (50#) injectors are also too small for 8psi. When I just had my Whipple with 8psi on stock injectors, I was we'll over 90% (80% is generally considered safe) injector duty cycle at WOT. At 8psi, your actual rail pressure will be closer to 50psi. I have 60# injectors now and I'm still over 90% at WOT. The problem is with the returnless fuel system and the fuel pump control module and you don't even want to start looking in THAT mess, trust me. I gave up and am currently installing a meth injection system to make up for the high duty cycles at full throttle. Do yourself a favor and get some big (80#+) injectors, get your tune corrected for them and be done with it.

Originally Posted by JCunningham

Dyno tuned today the stock injectors were at 98%idc need ID850