Does anyone know how to scale down injectors for a fi/c base map ? I have a base map but it is for larger injectors and is pulling more fuel than I would need to pull. Any help would be greatly apreciated.

 

Simply adjust the negative values in the fuel map more toward positive.

Example, if it's at -65, try -45 and go from there. If you have the size of the new injectors, post up and I will go ahead and tell you around the exact point for a 14.7:1 adjustment.

 

or if you upgrade to the 3.01 software, they have an injector calculator, but I think it will overwrite the map.

 

Listen to Paul he said it best.... do you have a wideband on so you know what your changes have done?

 

My injectors are 400cc when enter in the values is it in the fuel map or the 02 map ? which map is open loop and closed loop ?

 

how do you get to the injector calculator ? I remember seeing something on aems forum that gives you the ratio say 370/400 -1

 

yeah you can use that formula to get it idleing but after that you'll have to figure it out..... do you have on a WIDEBAND

 

Stock (320/400)-1 = -20 should be in the main map. The closed loop tuning is done through the combo of the main map and the O2 table when used with the voltage clamp.

 

Paul, wouldnt you say get the main fuel map set up first and then tweak with the o2 map? Im stressing the wideband cause these things can be a bit of a PITA to tune without being able to log the AFR cause logs are all you have to go by since there is no map trace

 

ABSOLUTELY! Get the main map as close as you can first. Then if you need more, start working the voltage clamp and then the O2 map.

 

That MAP trace is real time.

 

in version 3.01, go to the fuel map, right click on any cel and choose the injector calculator.
Make sure you make a backup of the map first because as soon as you make the change it writes it to the map and you can't go back.

 

What kind of fuel would you I should be adding up top and pulling with 400cc injectors?

Also I am having problems right now with the stock ecu, this is what it does. With the stock injectors in when you drive and take it out of gear and your foot off the gas and let the rpms drop to idle it dumps a ton of fuel in and stalls. So when ever I come to a light or stop it stalls out. It did this with the trd injectors at first so we thought that they where too big and pulled them out and reset the ecu with the stock injectors and still have the same problem ?

 

when you say take it out of gear, do you mean your in full boost and then take it out of gear with the BOV going off? Or just cruizing out of boost and taking it out of gear?

 

just cruising and then take it out og gear, the a/f cruising are good just when I take my foot off the gas they go crazy rich then lean and bounce around. I have not gone into boost yet I am still breaking in the turbo. Maybe the maf is dirty ? or it could be the maf placement, it is a sri that drops below the battery and I used the Injen maf holder which gets smaller (2.5") where the maf is and goes back to 3". At this point if the car cant run right with the stock ecu and injectors I don't think I will be able to get it to run right with the fi/c either which I have not hooked it up yet.

 

Yeah .... I am refering to the need for something that will log the active cells in a run and leave them highlighted..... you know what I mean! but yeah the map trace is real time but if your street tuning it can be a PITA cause there is so much going on

 

Listen dont get discouraged, our car is a MAF car.... If your are dumping your BOV to the atmosphere then everytime you get off the gas your car will spike rich.... your dumping fuel but losing air essentialy so this is normal...... and the lean spike is normal when you take your foot off the gas it registers like that on a wideband...... not to flame you or anything but what you need to do is take it to someone for tuning until you get a better understanding of tuning.....you can figure this tuning thing out by looking at your logs and observing what the car did and felt like at what RPM and AFR..... you basically will always have this richness between shifts with a MAF setup if your voltage clamp is set up correctly then the ECU will take car of fuel at crusing speeds where your basically running NA recircing the BOV will eliminate the rich spike.... you also can tweak partial throttle boosted areas of the map by biasing the 02 sensor, make sure it correllates with what your doing in the Fuel map.... when you go standalone and convert to a MAP setup then you dont have to worry bout it..... but you have to basically drive around it or recirc the BOV

 

Paul took care of me

 

As for the maf I ha d a full open bov on my s/c and it ran fine, so I guess the n/a ecu is more sensative. either way I'll have the fi/c in tomorrow and do some data logging and tweaking from there. The thing that sucks for me is the closest fi/c tuner is like 3 hours away.

 

Okay so I got the fi/c in and a basemap scaled for my injectors, the map is idling at 12:1 way too rich so when I try to pull fuel on a laptop it goes closer to 14:7 but then goes back to 12:1 ? I pulling in the fuel map only but it seems like I have to change values in the o2 map also ?

Also the maf is supposed to be clamped which I though was causing the stalling after taking my foot of the gas pedal but it is still stalling out. Even though the maf is clamped can it still cause problems ?