LNF STFT and LTFT Tuning

[BackyardTurbo_FTW]

I usually do the Freq table twice to get it within 1%. Then do the Corr table twice and finally go back and recheck both, adjusting HALF of the shown value. Should be all within +/- 1% after that!

[Gimpster]

Question: Why is 191 the max I can assign to the load% axis on the MAF Correction table? Is this by design or a bug in HPT? Asking because I'd like to submit it for review unless it already has been

With some of our cars running in the 280-300% ranges, would be nice to tweak that table for a finer MAF tube.

[BackyardTurbo_FTW]

Yea, I noticed that too. Good thing to add!

[Gimpster]

http://www.hptuners.com/forum/showth...321#post196321

Just filed it there, we'll see what they say. If anyone has more info to add please do.

[shabby]

You now take the changes in percent and apply it to the Maf Correction table:

(I did the 4 cells in the top left corner)

If the chart shows a -1 change, you highlight the same cell on the Maf Corr table and multiply it by .99. Repeat the same process for the entire table going cell by cell!

Wait... you edited each cell one by one?
If you would just copy the whole histogram and then paste special/multiply by % into the maf correction table you'd get the same effect in a fraction of the time
Btw great guide

[GeoffH]

Thats what i have been doing

[BackyardTurbo_FTW]

Learn something new all the time

OK, so I just did some MAF changes and used Paste Special.... WTF was wrong with me doing it cell by cell LOL!!! You should've saved my ass sooner (j/k)

I will update the guide with that lil tidbit, thanks again!

[GeoffH]

LOL, I figured it out week before last by reading some other post on here somewhere

[shabby]

OK, so I just did some MAF changes and used Paste Special.... WTF was wrong with me doing it cell by cell LOL!!! You should've saved my ass sooner (j/k)

I can understand doing around 10 cells, but changing almost 100-150 cells would drive me nuts, im surprised you didn't go bonkers... or did you?

Btw does changing your maf calibration table affect your lbs/min readings in anyway? Reason i ask is because i had to bump that table up 30% to get my fuel trims down to 0, my maf is in a 3" ic pipe though.

[Cobalt09SS]

LOL I did mine one at a time. took an hour because i used paper and tape to keep the colums stright!!

[BackyardTurbo_FTW]

I just had both windows open next to each other and was able to do it quickly. I would go thru and do all the *2%, then 1% etc.. Went quick altho it was painful LOL. Thanks for the tip

[badbaltguy]

how do i take screenshots of my logs?

[mkriebs]

ctrl or fn button + print screen button.

Paste into MS paint, save and upload as an attachment on your post.

[Cobalt09SS]

still looking up the STFT thing.... If i have + and - numbers how do i do each?

[BackyardTurbo_FTW]

Quick guide:

+1% = X 1.01
+10% = X 1.1

-1% = X .99
-10% = X .9

Hope that helps

[cobaltssoverbooster]

yea for the maf correction chart ( one with the curve of the maf in the editor )
i open an excell file and paste all the maf freq numbers in the excell file in a line.
then after recording you copy and paste them all so they make one line like the editor.
no copy the whole line and do the paste special thing and it will change those all at the same time.

as a tuner excell will be one of your best friends. some things you want to do you cant and most of the time excell can so use it to ur advantage.

edit updated my excell file i use. the table labels( maf hz ) are the labels from the editor. paste your values from the maf correction 1,2,3 tables in below and then use them as a paste special. {file is for LNF only, but idea works for all}

[GeoffH]

how do you use this histrogram while tuning the MAF?

[BackyardTurbo_FTW]

Copy the table and paste special, multiply by % over the Maf Corr table.

[GeoffH]

OK cool, I thought that but wasn't sure. So basically like the STFT table?

[cobaltssoverbooster]

Yes