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View Full Version : Tuning LTFTs, is this any better than stock?



Epox4life
February 18th, 2010, 01:35 PM
I just would like to know if I'm headed on the right path here with correcting my LTFTs. Do these numbers seem like they could be are correct?

Stock

http://img96.imageshack.us/img96/2163/beforetune.jpg

Non-Stock

http://img24.imageshack.us/img24/5295/aftertune.jpg

acomp917
February 18th, 2010, 03:31 PM
I'm not great with this system. Just so you know.

I don't see why your VE could not be off by that much. It appears that somebody has changed the contour of your VE. I adjusted mine 2 days ago. My LTFT's were an even 6% across the board, made adj. easy.

Look in my signature "personal junk" go to files/efi live/calc_pids...... There is one there that does LTFT BEN factor. It will change all of your mapped LTFT values to a %. Then you can copy and paste multiply the values directly into the VE. I would be careful with values in the 70kPa and above areas. Although since you are already adding a LOT of fuel in those areas... things cannot get worse.

Filter your LTFT cells for 25 to 50 hits and above. this will get rid of erratic values that are not accurate. Statisticians know better what to call that.

S

acomp917
February 18th, 2010, 03:41 PM
I think I understand that the 2 maps are before and after mods. I would adjust the VE until LTFT's reflect removal of ~2% fuel. Makes things safe. You could use my calcpid.txt until the VE is at 0 all over, then add 2% to the entire VE.

S