xssive

iTrader: (123)

I am worried that I may hit the injector limits once I get my heads on (hopefully around 380 hp with the B1 im swapping in) . With stock injectors:

BSFC=0.5; Injector Size=26.4#; Injector Duty=100%

(inj. size) (inj. duty) / (BSFC) * (# of inj.) = HP

(26.4 x 1.0) / (0.50) x 8 = 422.4

That would come out to approx ~420 flywheel HP. With 18% A4 drivetrain loss that would be approx. ~345RWHP.

So according to those calculations past 345RWHP in a 1999 A4 (with 18% drivetrain loss) you would start to go lean.

I am alreay at 337hp without heads or ls6 intake so my main question is should I step up to the stock 28lb. injectors or is this something my injectors could handle.

DenzSS

You can handle it without problem. The 26# injectors are good for at least 425rwhp, if not 450rwhp.

jmX

You'll be fine with stock injectors. Thats what 99% of heads/cam cars out there use.