BPC calcs with $88 help needed
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From: Hamilton, Ontario Canada
BPC calcs with $88 help needed
ok so i have decided to go with the $88 mask using the atds.bin as my starting point.(3400 v6 DIS SD transplant engine) i just discovered that the injectors in the car have been changed to 22#(should have been 15# injectors by what i have found). i am using tunerpro editer and in the constants table it shows the bpc as 48. when i did the calculations based on the formula BPC= 1461.5*(VOL/RATE) i get 204.1 (3.4L/6cyl / 22# x 453.6g/lb/3600)
when doing calcs based on what should have been in there i get 299. why such a large difference when in the editor constants it shows 48? am i on the wrong constant for changing bpc?
is this how to change for the larger injectors?
when doing calcs based on what should have been in there i get 299. why such a large difference when in the editor constants it shows 48? am i on the wrong constant for changing bpc?
is this how to change for the larger injectors?
Last edited by WHITE87GTA; Jun 1, 2004 at 03:03 PM.
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Originally posted by WHITE87GTA
is there anyone that can help with this?....
is there anyone that can help with this?....
Code:
L86BA FDB 0608 ; idle injector constant L871F FDB 12288 ; math constant, (12,288) N-Alpha fueling ; -------------------------------------- ; ; Injector Constant vs. EGR airflow ; ; BPC ; ; -------------------------------------- ; ; PFI: ; ; ; Val = 730.75 * (VOL/RATE) ; VOL = Vol of 1 Cylinder in liters ; RATE = Injector flow in gms/sec ; ; convert: #/hr = (gmSec / 453.6) * 3600 ; ; convert: gmSec = (#/hr * 453.6) / 3600 ; ;-------------------- ; ; 3.1l / 6 = 0.516667 l/cyl ; ; 16.5#/hr = 2.08 gmSec ; ; -------------------------------------- ;----------------------------- ; ; BPC ; airflow ;----------------------------- L8754 FCB 182 ; 0 FCB 179 ; 16 FCB 176 ; 32 FCB 173 ; 48 FCB 172 ; 64 FCB 167 ; 80 FCB 162 ; 96 FCB 160 ; 112 FCB 158 ; 128 FCB 153 ; 144 FCB 151 ; 160 FCB 151 ; 176 FCB 151 ; 192 FCB 151 ; 208 FCB 151 ; 224 FCB 151 ; 240 FCB 151 ; 255
RBob.
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