Ok so i never noticed but evoscan says my ltft is 100, mtft 50, ltft 68. but my wideband says im where i should be afr wise. In the "how to tune a evo" thread it only goes over injector scaling for fuel trims can maf scaling effect fuel trims?

 

Yes you scale your maf based on fuel trims, i suggest you look over the maf scaling tutorials on there. I think you'll find some useful info in those.

 

ok i thought they did, quick questions what hz are for low, mid, and high fuel trims? also whats the conversion for the numbers in the maf scaling to hz?

 

It depends on which ROM you are using. The cross-over points are different for different ROMs from what I remember.

 

i have 94170008 with a 2byte mod

 

Here you go.

 

thanks, ok so my mid an high fuel trims are off, i know what hz they are now but the numbers in the maf scaling are not in hz so how do i know which ones are for low, mid, and high?

 

What version of evoscan are you using?

ltft is 100, mtft 50, ltft 68
^^^ this does not make sense
LTFT Low, LTFT Mid, LTFT High, LTFT Current, and STFT are the possible fields.

 

evoscan 0.99. it just says low fuel trim 100, mid fuel trim 50, high fuel trim 68. i read that 100 is 0?

 

100 is the equivalent of 0 in that version.

Any particular reason you don't upgrade to 2.7? Its a pretty major upgrade, and you can just rename your .99 folder so that you can continue to use it if you want/need to.

Either way, the range should only be +/ 12.5%

 

I know that im trying to get as close to 0 as possible but which numbers in the maf scaling are for low, mid and high fuel trims? im gonna download the newest version of evoscan right now

 

Just change the scaling for the table in ECUFlash to Airflow Hz or Hz or whatever you have in there. The scaling should be /6.25 or /6.29 (forgot which one is the correct one).

Just in case you don't see it, the Hz values on the left side of the maf scaling/smoothing table are (using 6.25 scaling):

18.75
25
50
75
100
125
150
175
200
225
250
275
300
400
500
600
800
1000
1200
1400
1600

 

ok thanks, is that what it traslates to or are you saying to copy and past that into the maf scaling? sorry im a little slow with this

 

how do i download the new version of evoscan they want me to pay again when i go to their site, i cant figure out how to enter in my email or serial number

 

That's what it translates to...don't copy/paste that into the table.

If you edit the table in ECUFlash, you will see scaling that are used for the axes. For the Y axis, choose the AirFlowHz scaling or whatever it is called in your version. Then, you will be all set.