Guys

I'm attempting to lean out my upper RPM's. Currently my goal is 12.0 on E85.

Right now, the car is logging via LC-1, ~11.5 on the top end

Pictured below, is the logs from two runs. The bottom run, is before I leaned the car out. The top run, is after leaning it out. The highlighted cells denote the logged "AFRMAP" and the corresponding logged wideband AFR



What doesnt make sense to me, is the logged "AFRMAP" value, does not change between the two. Note above the in the higher rpms, the AFRMAP value stays at 8.7 on both logs.

Referencing the fuel map below, I have NO values near 8.7, they are all 8.3-8.4 and below from 6000rpm on up



To make a specific example, lets examine the specific point of 7000rpm and 250load.

Here is the fuel map before I leaned it out. Note the 7000/250 point reads 7.6



Now here is the fuel map after I leaned it out. Note the 7000/250 reads 8.4



Referencing the logs (pictured above), the AFRMAP value, has not changed (off of 8.7), and neither has the logged wideband (off of 11.4)

Now onto my question, is there some other fuel map thats interfering here? FWIW I have copied the hi octane map to the low octane map

Thanks guys!

 

LS and knock flag will alter the output value and fuel map used or a interpolation between them

 

Yes you should log knocksum and see what you get.
If the alue exceeds 6 the AFRMAP is richened.

 

his knocksum is in column S

 

looks like you need to change your injector scaling. this happened to me when i installed and tuned my bigger injectors. but take note that you will never actually get that to be exactly the same as there are other variables being checked like maf scaling, etc.

 

Never seen this and interested in the fix. It almost seems like the logged afrmap wont read below 8.7... Is the same for everyone? Some rescaling of the maf or similar tables could help bring your map numbers up above 8.7. Maybe then it will match?

 

subscribed to see the fix. Are you running the stock MAP which is a 3 bar correct?

 

Car has a JDM Map sensor and this version of tephra is setup for it

The injector scaling should be right on, if you notice column "K", those are my long term fuel trims - MID......pretty damn close if you ask me. They have been floating around 1% but not more than that.

 

interesting i have the same exact problem. id like to know the fix. what i have been told was the maf needs to be scaled and dialed in to bring the actual afr and the map numbers closer .theres a formula for it in merlins tuning guide on page 72 i found. although i have not tried this

 

he's not worried about the actual afr matching his map afr. His logged AFRMAP, which is supposed to match his map, isnt.

Like I said above, you can probably increase the scaling in the "open loop" region of the maf. It will require a fuel retune at those higher load cells, but shouldnt affect too much else as long as you dont mess with the areas of the maf scaling that are normally in closed loop. That should allow you to increase the numbers in your map to bring them above that 8.7. Im willing to bet AFRMAP just wont read lower than 8.7