Ok, I am back at $0D again, this time converting a $0D bin to MPFI (tuned port)
for a friend's kids 383. He is using ACCELL 30#/hr injectors, and I need to calculate the injector constant. However, when I looked at the formula I couldn't even work it out to get the stock answer.

;=============================================
; INJECTOR & ENGINE SIZING CONSTANTS
;
;=============================================
;---------------------------------
L4D88 FDB $15C6 ; 6.8 GMS/SEC INJ FLOW RATE 13.6/BANK
; CAL N * # Injectors / 409.6
;---------------------------------

$15C6 is decimal 5574

5574= n*2/409.6

5574*409.6=n*2

5574*409.6 / 2 = n or n = 1141555.2 ???? what??? I know I am doing something grossly wrong here, but what?

 

I'am using XDF file v1.75 look under engine constants and you well see injector flow rate ( MPFI lb/hr ) type in the size of one injector ( 30 #/hr ), then scroll down to injector flow rate ( MPFI gms/sec ) an divide one injector by number of cylinders ( 8 ) = 3.75 gms/sec . In reference to the code 4D88 an 4D89 , just a reminder don't forget to change the cylinder volume ( 4D8A )

 

Thanks 95. Actually, I am trying to arrive at $15C6 using the 6.8 gm/sec figure in the comments. If I can get that calculation correct, then I can size it for any injector I use. It is good to know that 3.75 gm/sec is what the 30# flow at.

 

Okay, I actually figured it out. the formula is incorrect in the SRC file I was using. Thanks to the tip from 95 4x4 I dug into tuner pro and found the formula to be

x= gm/sec * 819.2

or x = gm/sec * # injectors * 409.6 !! not divide by 409.6