I spend all day in the fire...this is more like a small BBQ....as for enough fuel, the fuel is there for what it is designed to do and then some....I will continue to feel the same way about your set up, you have accomplished allot with it and I am very impressed with the results....

 

A 43/44lb injector will take a FI engine well past 400rwhp, be it a Radix, turbo, flux capacitor or vortex generator. You can't tell an if an injector is enough just based on boost, or w/o looking at the pressure its seeing. They're are peeps running stock injectors with over 500rwhp. They have 120psi rail pressure with two pumps and voltage boosters, but never the less they're only 24lb'rs. Lots of variables at play here.

 

I have Ford 42#'ers AND a maganvolt in hand and, I just might get an inline 225lph pump just for giggles. Runnin out of fuel is bad, ask #7

 

Your Ford 42lb'rs are actually 49.XX lb'rs at 4bar rail pressure. I'm not sure what pressure you operate at though, being flex fuel and all. I still can't believe you didn't have either a voltage booster or pump though. Thats why #7 bit it....of course I'm not one to talk.

 

The worst part is I had the magnavolt sitting in my office the day before I went to the track. I just didnt have time to install it. I wasn't too worried about it because my AFR looked good on the dyno and I had driven around for a week (with plenty of WOT runs) before the track. The track was the straw that broke it I guess. Murphy strikes again

 

flex fuel stockers are 38#..why would you even change them then....i was just going by what i was told by sales up there in your office...

anyways we just changed the clips and installed my 42#'ers i had and sent back the radix ones . during tuning the fuel psi was good with the stock fuel pump..

 

Fueling and injector sizing is over my head, but with that said, comparing FPR to magnavolt...would the FPR be inferior enough for someone to take th FPR offline and install a magnavolt?

 

2003-2004 flex is 38, the 2005 flex is 30 that why magna Charger changes the injectors on 2005 flex vehicles

 

Here's a link to my web site and go to the Truck Photo Page for pics of the
Truck and Radix install and stuff.

(http://www.lbsz28blown.cz28.com)

Here's the dyno sheet:

 

using dyno numbers to find where you run out of injector or see how much you can make on the supplied injectors is fun, but isn't really relevant. with numbers being different from dyno to dyno and parasitic drag being considerably different you are shooting in the dark to use that number. a 5.3L using a 3.2" pulley can't be compared to a 6.0L using a 2.8" pulley for example. just in the blower alone there is about 40hp difference in the parasitic drag of when spinning it that fast. the same goes with wheel hp. an H2 or Silverado SS for example has 23% or higher of parasitic drag and something like an SSR or stock rcsb 2wd truck can be as low as 15%. the reason all of this is important is that your number to the wheels has nothing at all to do with how much fuel you need. if between the blower and drivetrain loss's you have 130hp in parasitic loss, you still have 130hp having to be produced by the cylinders and therefore fuel. where i've found the problem on the 04' and newer is at around 57lbmin and higher of a maf reading. at around 57 or so the lean condition starts and will only get worse. now an SSR can't exactly be put in the same catagory either though. they get big power with low boost, especially with having 10.8:1 compression. less boost requires less pressure on the other side. even at the same hp/airflow level, an engine at 10psi requires the injector to have more pressure on the supply side that something of the same power running only 6psi. with the SSR, if you were to pull say 55lbs min at the maf it's not going to have as much fuel pressure requirement to keep the injector spraying at it's rated number as say a 5.3L running much more boost to make the same airflow number.