Fox T-Bird/Cougar Forums  

ACT has little effect on fuel demand - it just effects whether Adaptive Learning will be enabled (>100F) & some spark adjustments at high temps. ECT controls fueling exclusively during warmup etc.

I am not sure why you say the above but its not correct.

The ACT has much to do with fuel mgmt as ref air temp changes.  The ECT is married up with the ACT in order to simply improve response time on data and provide the EEC with a more accurate input.

The ECT is more or less the second set of eyes out in the field for the boss (EEC) while the ACT is considered the primary input.

they both work together to manage fuel (maybe other things) with respect to engine air and coolant temps.

Simply saying the ACT has no roll after warm up reduces its purpose and tells everyone "i dont need that part"

FRCBFT = 0.0000

FRCBFT - Fuel - Base Fuel ACT to ECT Proportional Mult
The ACT to ECT proportioning factor used to determine the fraction of
  ACT to ECT that will be used in the columns of the Base Fuel table FN1307.
  The resulting fraction will get passed to the scaling function FN022.

Formula:
[FRCBFT*ACT+(1-FRCBFT)*ECT]
FRCBFT of 0 indicates that table columns will be 100% ECT.
FRCBFT of 1 indicates that table columns will be 100% ACT.
Any FRCBFT value between 0 and 1 results in a value that represnets both ACT and ECT.

FRCBFT   =   0.0000

FRCSFT - Fuel - Startup Fuel ACT to ECT Proportional Mult
The ACT to ECT proportioning factor used to determine the fraction of
  ACT to ECT that will be used in the columns of the Statup Fuel table FN1306.
  The resulting fraction will get passed to the scaling function FN022.

Formula:
[FRCSFT*ACT+(1-FRCSFT)*ECT]
FRCSFT of 0 indicates that table columns will be 100% ECT.
FRCSFT of 1 indicates that table columns will be 100% ACT.
Any FRCSFT value between 0 and 1 results in a value that represnets both ACT and ECT.

FRCTAE = 0.0000

FRCTAE - Accel Fuel ACT to ECT Proportional Mult
The ACT to ECT proportioning factor used to determine the fraction of
  ACT to ECT that will be used in the rows of the Accel Fuel table FN1303.
  The resulting fraction will get passed to the scaling function FN020B.

Formula:
[FRCTAE*ACT+(1-FRCTAE)*ECT]
FRCTAE of 0 indicates that table rows will be 100% ECT.
FRCTAE of 1 indicates that table rows will be 100% ACT.
Any FRCTAE value between 0 and 1 results in a value that represents both ACT and ECT

ALPHA   = 0.0000

ALPHA - Fuel - Transient Fuel ACT to ECT Proportional Mult
The ACT to ECT proportioning factor used to determine the fraction of
  ACT to ECT that will be used in the columns of the Transient Fuel tables FN1321 & FN1322.
  The resulting fraction will get passed to the scaling function FN022.

Formula:
[ALPHA*ACT+(1-ALPHA)*ECT]
ALPHA of 0 indicates that table columns will be 100% ECT.
ALPHA of 1 indicates that table columns will be 100% ACT.
Any ALPHA value between 0 and 1 results in a value that represnets both ACT and ECT.

dood,, your going to a level of detail that isnt needed. 
You simply stated the ACT has very little to do with fuel demand.

the "revised" Emissions shop manual controdicts your statement.  Thats what I can spell out , nothing more , nothing less.

The Emissions shop manual simply says the act does xyz and the ECT fine tunes for performance.

Maybe your source is for later revisions of EEC tables?

Dunno about the Emissions manual, but I do know that he has a MAF 'cause I looked in the signature of the thunderjet person you responded to before posting, thus I used a A9X processor as an example. The detail was necessary since I helped develop the definition file for this processor and you said I was "wrong".