GDI Injectors coming!!

Obviously this shows the parts are coming.  This is just another piece of the puzzle.  You gotta be happy about that.
 
I am not a fluid flow engineer, but I can only speculate that a constant value fuel pressure flows more through a large orifice than a small orifice.
 
Correct...but if it flows too much for the pump you lose your constant pressure and then end up flowing less than you expect...
 
I am with you, they don't release injectors, without a pump somewhere near in the future. This is a big break through, the mazdaspeed plat forum has been waiting a long time for bigger injectors, and we got them.

This is a good step towards 500hp, with a just tune and 50/50 E85 with monstrous amounts of torque
 
Awesome!!!  Finally can now run more boost without having to wire in and install meth injection.  Less complicated and less of a chance of failure via empty tank/electrical/pump etc. 
 
Do we actually know what kind of duty cycle the stock injectors are running at?  I'm afraid that we might find out the HPFP is giving up before the injectors are. Larger injectors will flow more at a given pulse width and pressure, but if the pumps are already failing to keep up with stock injectors, then they will only make the problem worse.

Does anyone know if pulse width, injector slope, etc can be logged with Live Link or Torque? If we can log these then we can calculate injector duty cycle based on a given rpm.
 
This is really inspiring. Surely they won't make injectors without a pump. They have to go together. Let's hope this is out around tax time.
 
My Sport is having issues running the livernois tune via the fuel rail pressure is dropping at 4500rpms then having to rebuild to proper levels. So larger injectors will not help me at this point.

Are there no pumps we could swap in and do a little fab work to make it fit/mate up for a proper install....diesel pump....something?
 
TouchOfEvil said:
My Sport is having issues running the livernois tune via the fuel rail pressure is dropping at 4500rpms then having to rebuild to proper levels. So larger injectors will not help me at this point.

Are there no pumps we could swap in and do a little fab work to make it fit/mate up for a proper install....diesel pump....something?
Click to expand...
Was it a dynotune or email order tune? How are you measuring fuel pressure?

Sent from my DROID RAZR HD using Tapatalk

 
JeffsSport said:
TouchOfEvil said:
My Sport is having issues running the livernois tune via the fuel rail pressure is dropping at 4500rpms then having to rebuild to proper levels. So larger injectors will not help me at this point.

Are there no pumps we could swap in and do a little fab work to make it fit/mate up for a proper install....diesel pump....something?
Click to expand...
Was it a dynotune or email order tune? How are you measuring fuel pressure?

Sent from my DROID RAZR HD using Tapatalk
Click to expand...

Email tune, i've ran the 91 v2 and hi boost as well as the 93 v2 and hi boost. All of them have issues. Stock tune the fuel rail sees all the pressure it needs. Obviously stock doesn't require as much fuel because of the lower boost numbers of course.
I'm using torque to monitor the fuel rail pressure. Torque with track recorder so i can play it back after a pull etc.
 
I started running the 93v7 last 3 days.  I am definitely getting more FRP now, and it stays higher longer.  I can't say it's flawless, but it is much better than 93v6 in the cold.  Once in a while, mostly when engine hasn't fully warm, I get a slight stutter or two, but it's quick and then it's gone.  I logged during one of these stutters on 93v7 and FRP dropped, but it recovered almost instantaneously.
 
Right now there is no tune for me to go to since i have an explorer. My guess on yours is that they lowered the boost a couple degrees. They seem to love extremely rich tunes.
Have you logged your boost along with a/f ratio?
 
The best I can explain it so far, From what I can see, the max boost is down sometimes to around 13.6 psi or so, although I've seen it go back to 15.3 a few times.  15.3 is what I was getting with 93v6 all the time.

A/F ratio seems to be as low as 10.6, only briefly, but now seems to run 11.1 to 11.3 more under WOT.  On WOT, it would jump to 11.1 then sometimes drop quickly to 10.6 or 10.7 then back to 11.1 and up.  It's definitely not running in the 10's as much anyway.

I'm using Dashcommand, so I only know how to read in playback mode, which does also record the highs and lows.  Hopefully this is some help.
 
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