[Diy_efi] 749 tweaks

[Bill Shaw]

I'm working on a cal for my new 5.0L 928 engine and I'm having some 
trouble.  I've had this basic setup running pretty good for several 
years and dozens of track days now - Porsche 4.7L V8 with LT1 throttle 
body, SyTy ecm (1227749) running a max of 9 psi from a Vortech blower.  
Recently I've 'improved' things - bigger 58 mm throttle body vs stock 48 
mm,  bigger cams, bigger injectors, extrude honed heads, headers, bigger 
exhaust.  I started with the same bin I ran on the previous motor and 
dropped bpw vs %egr a bit to compensate for the cumulative 
engine/injector changes then tweaked F31E base VE vs RPM & Map, and  F30 
base VE vs RPM to get it to start and idle.

It's starting and idling pretty good now,  but as soon as I touch the 
throttle the injector pulse width goes from about 4 ms at idle to about 
1.5ms. It spits & pops as long as I keep the throttle open and won't rev 
past about 2k.  As soon as I close the throttle I see the injector pulse 
width jump to 6 ms or so.   I've tried increasing the AE delta throttle 
and AE delta map tables with no real change.  Any ideas why it's 
shortening the pulse width when I crack the throttle?  Where should I 
look to  increase the pulse width?

Thanks,

Bill