I'd say somewhere in the 12-15psi range. Every setup will be different. Bottom line is that the Lancer ECU does not have a diverse enough ROM from the factory to allow for expansion of tuning like the Evo does. So pretty much when the Load begins hitting 120+ your tuning will be limited.

 

do you have a piggy bac of some sort and did you think about getting a wide band?

 

 

finally got it on!

 

I had some success last light with the local Lancer I've been working on. With modification to the MAF size and the MAF scaling, we were able to get the AFRs down in the 11's (or 9's actually if we wanted). This is on a 60 trim T3/T4 turbo that liked to creep up to around 14+ psi over 6000 RPM. Even with the creep issue, we were able to get the AFRs in a safe range and keep the load values under 115.

I can post maps when I get home, but they are not final at all. I had tried many different methods for tuning for closed loop fueling using the MAF scaling, only to find a noticeable exhaust leak that needs to be repaired ... so the MAF scaling table is goofy on the low end.

But, I basically raised the MAF size to about 265 and drastically increased the MAF Scaling after 500hz. It quickly ramps to the max value @ 1000hz. I don't think this drastic shift will be needed on most cars holding 6-10 psi as this was mainly to compensate for the boost creep.

Once the creep issue is repaired and the exhaust leak fixed I will be able to get final MAF table values for most boosted lancer owners to start with.

 

Awesome!!

 

 

Is there anything supporting your FPR or is it merely connected to the fuel rail? If it isn't, I would strongly recommend a support bracket. Engine vibration will break the aluminum outlet fitting on the fuel rail very quickly.

 

its just bolted on to the rail... i was thinking of a way to support it

 

Here are my rough settings applied to a stock MAF scaling table. This should be a good starting point for most people.



Set the fuel maps in the mid 10's @ 4000+ and you should be okay to do some pulls and really dial everything in.

EDIT :: I'm using the standard ECUFlash scalings for the MAF values. I haven't changed it to Hz.

 

hmm... how aggressive is the timing? that affects the AFR

i have my MAF Size set higher than your settings,
and MAF Scaling at 255 at 600hz and above,
along with the fuel map in the low 10s,
but i cant get my AFR as low as yours...

 

Like I said, the car in question had a rather big turbo and creep issues, so the max values in the scaling table were needed for fueling up top. Are you logging your hz values and adjusting that area of the scaling table? I'd think that a standard boosted lancer with a 16G or similar would be in the 800 hz range, so you might need to increase that area of the table for a little more fuel.

And the timing is fairly tame as there are some loose ends to tie up on the car before we finish tuning. And timing does affect AFR, but only slightly ... maybe .1 AFR shift for 3 or 4 degrees of advance. That's why you always tune timing last.

 

my values in the 600-800 hz range are 254-255. thats as far as it'll go...

 

Oh, you've rescaled the table then to the correct values. That's the difference in numbers. What loads are you seeing?

 

well i've been playing around with the MAF size, so the MAF size has an affect on the load.
anyways i see about 125% using 293 MAF size.

Today I got to hold my 11.0 AFR all the way to 5k RPMs, then it jumped up to 11.8 - 11.9 AFR by 6k RPMs

i just need to be able to hold the AFR to redline and i'll be set.
Should I increase fuel pressure?