i was wondering which one of these are used more commonly for tuning and what would be the advantages and the disadvantages of using them to tune the AEM fuel map? i know that raw is the only one which is used for calculating without modifiers in the equation, but i also know those should be taken into consideration correct

 

I always use RAW after setting the correct MicroSec/bit. Just so you are aware the MicroSec/bit is the modifyer that the fuel injection table uses so you can be more granular on your changes. I use RAW on the fuel becuase it is also more granular for you changes due to it giving you a max of 255 (key word(different)) values. When I say 255 different values you get numbers from 1-255. When using PULSE WIDTH or DUTY CYCLE you get a decimal number that may not always change due to it only showing a 10 decimal place. You still get 255 adjustment points but the bottom line is that they will all make the same adjustments RAW is just plain and simple due to the numbers always being different yet clear values.

To use MicroSec/bit and RAW correctly together you want the RAW values close to maxed out leaving some adjustment at the top of the map sensor levels. This way you don't kill yourself becuase once you reach 255 in RAW you have to raise MicroSec/bit to get more fueling and you don't want to do this if you can keep from it. But by doing this correctly you get a very granular fuel map and you can virtually adjust out anything smoothly. For example I use a MicroSec/bit value of 80 and a 3.5 bar map sensor so at max torque at 35.12 psi around 5400-5800 rpm my RAW values are 244 and this is on 850cc injectors at stock fuel pressure using a nonboost comp style map. I do not use boost comp for several personal reasons.

I hope this helps you start out with a better understanding how they work and why I use them. Good luck.

NOTE: Don't forget, if you just lower or raise the MicroSec/bit it will raise or lower your entire fuel table and throw off your tune so you want to change it first when making a new map.

 

hey thanks for the info, i was looking for an answer just like that. That was what i wanted to know if each setting was pretty much finer than the rest. the question is though, the manual says that by using either pulse, duty cycles it takes the modifiers into consideration. Could that possibly indicate that the reading on the RAW setting may be inaccurate because of the fact that the RAW setting dont compensate for idle control, EGR operation, etc. Is that possible ?

 

As in a logging perspective yes you are correct. When you log you do what to log Injector duty cycle and your Fuel Map value so you can have a good eye on both due to several other trims that are taken into consideration with the Injector Duty Cycle.

As in the fuel mapping the Raw can also be a incorrect reading as well depending on how you look at it, but remember Raw is just what is says. For example if you have your entire AEM fuel map with on RAW view set to 50 on stock EVO injectors with the MicroSec/bit set to 75 look at 4.06psi load row on my map at 5000rpm it shows 15.6% (Fuel Map only injector duty cycle no trims are taken into account on the fuel map at any time or view). Now while viewing your injector duty cycle fuel map pull open your Full List again and rise or lower your MicroSec/bit, you will notice that it will automatically raise or lower your Injector duty cycles on your fuel map. After playing with it move it from 75 to 100 and first look at the new duty cycle, mine went from 15.6% to 20.8% just from raising the MicroSec/bit. Now while leaving MicroSec/bit at 100 go back and change your fuel map view to RAW again and you will notice the RAW values still show 50. The RAW value was not changed but the other 2 were, this happens because it is a RAW numbered indicator of the MicroSec/bit upon each Load/RPM cell value. This is how RAW can cause an incorrect indication if you don't take it into the correct consideration.

I hope this helps.