Injector Flow Rate vs Injector Flow Rate(display) in Tunerpro
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Joined: Mar 2013
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From: pardeeville, wi
Car: 1991 Pontiac Firebird convertible
Engine: 3.1 soon to be 3.4/3100
Transmission: 700r4
Axle/Gears: original gears, for now
Injector Flow Rate vs Injector Flow Rate(display) in Tunerpro
I put aftermarket 16 lb injectors in my 3.1l and now it consistently runs slightly rich(14.0 when OL idle wants 12 on a wideband). Not enough to even dirty the plugs.
I've heard others talk about some equation with injector flow rate vs fuel pressure and was wondering if either of these 2 options dealt with that. I'm running a modified BAWX bin with 14° timing 1.6 roller too rockers and heades
I've heard others talk about some equation with injector flow rate vs fuel pressure and was wondering if either of these 2 options dealt with that. I'm running a modified BAWX bin with 14° timing 1.6 roller too rockers and heades
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From: Chasing Electrons
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Re: Injector Flow Rate vs Injector Flow Rate(display) in Tunerpro
Need to check the BIN addresses in the XDF to see which one is which. This is the injector flow rate used for idle:
This is the one used for the 'display', which our cars don't use:
Then the BPC for use when not in idle:
RBob.
Code:
L86BA FDB 0608 ; idle injector constant ; 0.2375 SEC/GM PRODUCT OF INJECTOR FLOW RATE AND FUEL
Code:
L86BC FDB 0512 ; N/U, 2.667 GL/HR SINGLE INJECTOR FLOW RATE IN GALLONS/HOUR
Code:
; -------------------------------------- ; ; Injector Constant vs. EGR airflow ; ; BPC ; ; -------------------------------------- ; 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 ;----------------------------- ; ; 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
Thread Starter
Member
Joined: Mar 2013
Posts: 361
Likes: 1
From: pardeeville, wi
Car: 1991 Pontiac Firebird convertible
Engine: 3.1 soon to be 3.4/3100
Transmission: 700r4
Axle/Gears: original gears, for now
Re: Injector Flow Rate vs Injector Flow Rate(display) in Tunerpro
Need to check the BIN addresses in the XDF to see which one is which. This is the injector flow rate used for idle:
RBob.
Code:
L86BA FDB 0608 ; idle injector constant ; 0.2375 SEC/GM PRODUCT OF INJECTOR FLOW RATE AND FUEL
Code:
; -------------------------------------- ; ; ; -------------------------------------- ; 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
Where did you get .2375?
In my tune location Ox6BA is 02 and Ox6BB is 60 which work out to the "raw hex data" of 0260 for the 16.71#(what TP insists on changing 16# to) injectors.
I haven't done any hex editing before so I'm sorry if I'm slow getting it.
Also what is with the VAL=xxx /VOL=xxx /rate? Where is that used?
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iTrader: (1)
Joined: Mar 2002
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Injector Flow Rate vs Injector Flow Rate(display) in Tunerpro
ok I'm confused. If I understand properly, according to the formula at the bottom the bold number would come out to about 1.8 lbs/hr.
Where did you get .2375?
In my tune location Ox6BA is 02 and Ox6BB is 60 which work out to the "raw hex data" of 0260 for the 16.71#(what TP insists on changing 16# to) injectors.
I haven't done any hex editing before so I'm sorry if I'm slow getting it.
Also what is with the VAL=xxx /VOL=xxx /rate? Where is that used?
Where did you get .2375?
In my tune location Ox6BA is 02 and Ox6BB is 60 which work out to the "raw hex data" of 0260 for the 16.71#(what TP insists on changing 16# to) injectors.
I haven't done any hex editing before so I'm sorry if I'm slow getting it.
Also what is with the VAL=xxx /VOL=xxx /rate? Where is that used?
The table of BPC values is used whenever the engine isn't in idle. If is based on the EGR flow rate. The "Val = 730.75 * (VOL/RATE)" equation is used to calculate the BPC value at 0% EGR.
RBob.
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