Whats up guys well i had my car professionally tuned cuz im still not to good at tuning myself. i was going thru my tune and saw that my injectors were scaled to 886 and I have 880 injectors is that normal or maybe my tuner made a mistake? thanks

 

there is an injector scaling thread with alot of the common injectors and their values in it, might be worth looking through and seeing if yours are there.

Which 880 injectors do you have?

 

I have the pte 880 injectors

 

Well, 886 probably isn't the 'correct' scaling for your injectors, but as as long as your fuel maps and latencies were tuned for that particular scaling, then you should still be OK (assuming your trims are all pretty good).

 

well i just logged the short term fuel and its at -12.4, i dont know if i should change it cuz then im gonna need to mess with the afr map also right? A lil background on my car its a evo 9 runnin sd and boostlogic turbo kit, gsc s1 cams, pte 880 and walbro 255

 

from this thread https://www.evolutionm.net/forums/ec...upermerge.html the values for the pte 880's should be

PTE 880s

scaling 770

3.312
2.304
1.392
1.008
0.792
0.600
0.504

you could try these values and then see what your fuel trims are if your happy with them, then just adjust the afr map accordingly

 

Well, with SD in the mix, depending on how your tuner tuned it, the injector scaling may mean next to nothing.

If the tuner didn't match the maf tune to the SD tune and/or did something like a 1:1 map VE table, then you are going to have screwy numbers.

Your -12 STFT means that the ECU is taking out even more fuel. That's probably why your tuner used such a high scaling in the first place. I'm guessing that they didn't properly tune the VE tables and they have a 1:1 mapVE value at low map/load.

 

here is what i have for my pte 880

4.69 3.696
7.03 2.568
9.38 1.704
11.72 1.224
14.06 0.960
16.41 0.552
18.68 0.432

I also idle at about 11.8-12.0 AFR, does that have to do w the injector latancies n scaling? it idles rich and really getting of the smell lol

 

im tired of messing with it, i think im just gonna throw the MAF back on.

 

As I mentioned, it's not the injectors that you need to be tuning at this point. It's your SD VE tables.