E38 Injector Scaling

I am wanting to be double sure on associated adjustments for an E38 ECM in a 2007 RCSB truck with a max IFR of 63.4922 (in V8). It will be running only on a 7# spring on the gate with no other external boost control. Fueling and timing will be no issue dialing in. I am just wanting to make sure I covered my basis when scaling injectors and the theory behind doing so as some people have different ways of manipulating the maps. Injectors are FIC 72lb/hr @ 58 PSI with good associated data.

I have seen where most just double Stoich and scale IFR Base by 50%. Will the Fueling and Spark grams per cylinder needs to be adapted as well as knock sensors?

Data used is within this link direct from FIC and FP is 58psi and boost referenced and MAF is now card style like the 2009+:
https://fuelinjectorclinic.com/GM-DATA/EFI-LIVE-0650

the whole point to double stoich/scaling ifr is keep as much usable g/cyl as possible.

there is also a ivt weighting coefficient that needs to be halved to keep the ivt in check.

Quote:

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Originally Posted by Tre-Cool

the whole point to double stoich/scaling ifr is keep as much usable g/cyl as possible.

there is also a ivt weighting coefficient that needs to be halved to keep the ivt in check.

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What table is this by chance?

I had also wondered if you could keep everything as is and either scale (1.135 over the 63.4229 hard limit for 72lb/hr) in B1213 or B1214 and dial in VVE accordingly as this truck will be going SD and keep all stoich, flow rate and tq/cylinder volume info as is from factory?

sadly, efilive does not have the ivt scaling. but if you post your os. i can probably find it pretty quick and u can add it to a cax file.

Quote:

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Originally Posted by Tre-Cool

sadly, efilive does not have the ivt scaling. but if you post your os. i can probably find it pretty quick and u can add it to a cax file.

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E38 ECM from 2007 RCSB 5.3/60e. OS# 12614088

[BTU0049]
; Description
; --------------------------------------------------------------------------------------------------
DESC.001 = IVT Weighting Coefficient - AFR Term.
DESC.002 = Referenced to the Ethanol % of the gasoline being used.
; Seg Caption Major Minor Vis Dis 2d Grp
; --- -------------------------------------- ------ --------- --- --- -- ---
VIEW = 2 "IVT Weighting Coefficient - AFR Term" "Fuel" "General" 2 2 0 0
;
; Address(es) BitOff Bits Typ Inv
; -------------------------------- ------ ---- --- ---
ADDR = 1E67A8 0 16 UNM 0
;
; Units Factor Offset Prec MinLimit MaxLimit MinUser MaxUser
; ------ ----------- ------ ---- -------- -------- ------- -------
SI_SLOT = Factor 0.003906309 0 2 -128 128 -128 128
;
; Units Factor Offset Prec MinLimit MaxLimit MinUser MaxUser
; ------ ----------- ------ ---- -------- -------- ------- -------
IM_SLOT = Factor 0.003906309 0 2 -128 128 -128 128
;
; Body Col Row
; -------------- -------------- --------------
ULABELS = . . .
;
; Enumerations
; ---------------------------------------------------------
SI_ENUM = .
IM_ENUM = .
;
; Units Labels
; -------- ---------------
SI_COL = Factor """AFR Term"""
IM_COL = Factor """AFR Term"""
SI_ROW = Ethanol% "0,10,20,50,80"
IM_ROW = Ethanol% "0,10,20,50,80"

Quote:

---

Originally Posted by Tre-Cool

[BTU0049]
; Description
; --------------------------------------------------------------------------------------------------
DESC.001 = IVT Weighting Coefficient - AFR Term.
DESC.002 = Referenced to the Ethanol % of the gasoline being used.
; Seg Caption Major Minor Vis Dis 2d Grp
; --- -------------------------------------- ------ --------- --- --- -- ---
VIEW = 2 "IVT Weighting Coefficient - AFR Term" "Fuel" "General" 2 2 0 0
;
; Address(es) BitOff Bits Typ Inv
; -------------------------------- ------ ---- --- ---
ADDR = 1E67A8 0 16 UNM 0
;
; Units Factor Offset Prec MinLimit MaxLimit MinUser MaxUser
; ------ ----------- ------ ---- -------- -------- ------- -------
SI_SLOT = Factor 0.003906309 0 2 -128 128 -128 128
;
; Units Factor Offset Prec MinLimit MaxLimit MinUser MaxUser
; ------ ----------- ------ ---- -------- -------- ------- -------
IM_SLOT = Factor 0.003906309 0 2 -128 128 -128 128
;
; Body Col Row
; -------------- -------------- --------------
ULABELS = . . .
;
; Enumerations
; ---------------------------------------------------------
SI_ENUM = .
IM_ENUM = .
;
; Units Labels
; -------- ---------------
SI_COL = Factor """AFR Term"""
IM_COL = Factor """AFR Term"""
SI_ROW = Ethanol% "0,10,20,50,80"
IM_ROW = Ethanol% "0,10,20,50,80"

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Much appreciated. Just to verify, where does this need to be added within the .CAX file?

anywhere.

thats the v7 format. so if yoru using v8 u will need to convert it over to the new format using the conversion tool