EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

EvolutionM - Mitsubishi Lancer and Lancer Evolution Community (https://www.evolutionm.net/forums/)
-   ECU Flash (https://www.evolutionm.net/forums/ecu-flash-179/)
-   -   Actual AFR's to match AFR on fuel map? (https://www.evolutionm.net/forums/ecu-flash/602653-actual-afrs-match-afr-fuel-map.html)

grim~ Mar 14, 2012 06:50 AM

Actual AFR's to match AFR on fuel map?
 
What is all needed to be done in ecuflash so that my car will read the same AFR value i input in my fuel maps? it seems to be a little off,idk if thats normal or if i have something wrong like injector scaling or MAF scaling. thanks.

evo8426 Mar 14, 2012 07:05 AM

You can switch to speed density and it will be easy to match, but on maf my fuel map was never close to actual afr.

grim~ Mar 14, 2012 07:19 AM

yeah i plan on switching to SD soon,just wanna get a good MAF tune on here for now.

211Ratsbud Mar 14, 2012 07:25 AM

MAF makes AFR numbers matching fuel mapping a lot trickier than SD. Infact even on SD if you match your numbers at 11.5 theres no guarantee that it will be accurate to make your fuel map 10.5 and recieve a 10.5. This serves no functional purpose in MAF, and the only thing it does in SD is makes it a little more visual to work with, but then your VE table is!!!! lol.. dont get preoccupied with making them match in MAF is what Im getting at. If you want to switch to SD and tune VE accordingly that makes sense however.

Boosted Tuning Mar 14, 2012 01:24 PM

Dont worry about having the number in the fuel map, match your actual AFR. Just use the numbers as arbitrary numbers, higher means leaner and lower mean richer.

You can try to use MAF comp to make them match, but its time consuming and not worth it and sometimes you cant get it to match everywhere.

Raptord Mar 15, 2012 09:08 AM


Originally Posted by Boosted Tuning (Post 10035275)
Dont worry about having the number in the fuel map, match your actual AFR. Just use the numbers as arbitrary numbers, higher means leaner and lower mean richer.

You can try to use MAF comp to make them match, but its time consuming and not worth it and sometimes you cant get it to match everywhere.

This. I played with MAF comp a while ago to get the map numbers closer to the real numbers, they`re pretty close now but not always exact. Good enough for me.

catman78 Jan 11, 2013 07:18 AM

bumping this

For SD

If my AFR map = 11.0 and logged AFR's are 13, then adjust RPM VE(up) in range OR lower values in Fuel Map to get them closer?

thanks

dolphin888 Jan 11, 2013 07:48 AM


Originally Posted by catman78 (Post 10600937)
bumping this

For SD

If my AFR map = 11.0 and logged AFR's are 13, then adjust RPM VE(up) in range OR lower values in Fuel Map to get them closer?

thanks

In my opinion you should adjust RPM VE.
Are you using 2d SD?

catman78 Jan 11, 2013 08:27 AM

yes, 2d.

My lean area is 2500k - 4500k, After 4500k the numbers are a bit closer
Seems like I will need to add quite a bit to bring it down.
Not sure how smooth the transition will be from <2500k.

dolphin888 Jan 11, 2013 10:14 AM

Lean spool is on or off?

catman78 Jan 11, 2013 10:33 AM

off

dolphin888 Jan 11, 2013 12:15 PM


Originally Posted by catman78 (Post 10601337)
off

If MAP VE is around 1:1, LS is off, you should increase RPM VE (assuming everything else is OK).

catman78 Jan 11, 2013 01:52 PM

I did not do the initial SD tune so I did not touch MAP VE

Here's what I have seems close to 1:1

13.4376 12
25.6536 24
37.8696 35
50.0856 47
74.5176 73
116.052 114
145.370 144
415.344 413

Current RPM VE

500 78
1000 79
1250 85
1500 90
2000 98
2500 104
3000 107
3500 107
4000 107
4500 106
5000 105
5500 105
.
.
.

My concern was having too much of an increase, say bumping up
3k-4.5k to 109

Not sure if surrounding areas need to be "smoothed"

BTW
thanks for your help, appreciate it

dolphin888 Jan 11, 2013 02:40 PM

I start tuning SD from MAP VE always... There are no radical changes from base setup, it might be slightly different than 1:1.
RPM VE map is very individual, but in my own car there is 120+ VE at higher RPM range (3500-8000rpm).

catman78 Jan 11, 2013 02:50 PM

ok thanks, will try ramping up in am


All times are GMT -7. The time now is 04:17 AM.


© 2026 MH Sub I, LLC dba Internet Brands