Fuel injector Constant

[Mike Rolica]

That figure is for a set standard pressure.  the actual output of the
injector would depend on what the fuel pressure reg is set at at the
factory.  Don't quote me on this but I think the standard is 35psi, whereas
tpi in 87 is set at 39psi.  I'm running 24lbs/hr injectors on my 355TPI
@52psi and I have no problems with rich idle with the OEM chip.  When you
run at a higher fuel pressure, the fuel atomizes better  it's more "misty"
and performance is better.  do you have an adjustable fuel pressure reg.?  I
made mine, works good!

> -----Original Message-----
> From:	Bruce Wilcox (EUS) [SMTP:EUSBEW at am1.ericsson.se]
> Sent:	Thursday, September 09, 1999 8:20 AM
> To:	'gmecm at efi332.eng.ohio-state.edu'
> Subject:	Fuel injector Constant
> 
> Hi Guys,
> 
> I looked at the fuel injector constants for various displacement 1987 TPI
> engines(1227165 ECU). The results are very interesting.
> 
> To my knowledge, the 87 350 injector should be 22 Lbs/Hr and the 87 305
> injector should be 19 Lbs/Hr. Could someone verify these numbers???
> 
> The 350 injector constant stored in the EPROM translated to 23.09 Lbs/Hr
> and
> the 305 injector constant translates to 20.86 Lbs/Hr. Does anyone have an
> idea why the discrepancy exists??
> 
> Thanks and Best Regards,
> 
> Bruce Wilcox
>