[urq] EFI + MAC-14 maxing ataround 5k RPM

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Ben
Maybe you know this already...  
These are normally rated injectors at 3bar fuel pressure *DIFFERENTIAL* (=  
vs manifold pressure).  Which means exactly that the fuel output goes  down as 
the fuel pressure differential goes down.  Even no load, you need  to have 3 
bar pressure differential, or the software isn't going to work  right.  IIRC, 
MS assumes Fuel Pressure Differential as a constant x.x  bar for software table 
purposes.  Remember, the lower the vacuum, the  higher the fuel pressure 
required, a 5k no load rev could be enough.  Do  you have manifold reference to 
the Fuel Pressure Regulator?
 
The other thing I would look at is disconnecting the fuel pressure  regulator 
return line insert into a gas can, and try the rev test again.   If you have 
no fuel coming back to the tank at high rev, you have a fuel  starvation 
problem, pressure or flow.
 
HTH
 
Scott J
 
 
In a message dated 10/23/2007 7:13:04 P.M. Central Daylight Time,  
benswann at verizon.net writes:

I have  had some conflicting information on them – I originally had 
information they  were
42 lb/hr and purchased as:

Injectors are Blue Top 42 lb/hr or  stock AAN blue                   2.4      
 210
2.55     pintle  (1)



I found other info. on them  -



D3165BA  are 37 lb/hr Delphi-Lucas RS-2 equivalent.  These are supposed to be 
good  for
use in an RS2 upgrade to an AAN/3B engine, so should handle my fueling  
requirements
regardless.


 



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