Ford Mustang Forums banner

21 - 29 of 29 Posts

·
Registered
Joined
·
24,255 Posts
what are the long term fuel trims?
 

·
Registered
Joined
·
192 Posts
Discussion Starter #22
what are the long term fuel trims?
Still trying to figure out all of the definitions for the gauges on the Dashboard.

Guessing that long term fuel trim is LTFT, which I don’t see on the Dashboard, but it might be in another area that I saw once and need to see if I can figure out where.
Ken R
 

·
Registered
Joined
·
24,255 Posts
also known as kamrf 1 and 2
 

·
Registered
Joined
·
192 Posts
Discussion Starter #24
Okay
Full throttle TP 4.78, rpm 5100, LAMBSE 1&2 0.805, KAMRF 1&2 1.00
Deceleration TP 0.00, rpm 2200, LAMBSE 1&2 0.953, KAMRF 1 1.082 #2 1.086
Idle TP 0.99, rpm 696, LAMBSE 1&2 1.008, KAMRF 1 1.082 #2 1.086

Make any sense to you?

Ken R
 

·
Registered
Joined
·
24,255 Posts
kamrf will be 1 at WOT

you want all driving in closed loop, non WOT

at idle you are slightly lean

you want to to see load and rpm cells
 

·
Registered
Joined
·
192 Posts
Discussion Starter #26
kamrf will be 1 at WOT

you want all driving in closed loop, non WOT

at idle you are slightly lean

you want to to see load and rpm cells
Are you talking about the load and rpm on the dashboard or could it be something that I would find in scalers, flags, tables or functions?

I have a question on a different subject, but is still relevant to tuning.
If I change from the stock 65mm throttle body to a 70mm throttle body, would it change anything in my tune?

Thank you for all of f your help.
Ken R
 

·
Registered
Joined
·
24,255 Posts
adaptive fueling corresponds to a cell in a table based on load and rpm

therefore you need to be in each cell

if you raise the rpm from idle and watch kamrf you will see it change as you traverse the cells

new TB will require you to measure the amount of it flows when closed

you then enter that value to the ithbma scalar

its in the efi writeup, as far as procedure
 

·
Registered
Joined
·
192 Posts
Discussion Starter #28
adaptive fueling corresponds to a cell in a table based on load and rpm

therefore you need to be in each cell

if you raise the rpm from idle and watch kamrf you will see it change as you traverse the cells

new TB will require you to measure the amount of it flows when closed

you then enter that value to the ithbma scalar

its in the efi writeup, as far as procedure
Thank you
 

·
Registered
Joined
·
24,255 Posts
i should have noted, its imperative that you have no air leaks when you measure TB airflow

its key that its accurate, to get transitions from open throttle to closed throttle and stable idle rpm
 
21 - 29 of 29 Posts
Top