I'm just about to start tuning my F24C with an AEM.

Build is 87.25mm H22 mahle pistons with 99mm stroke.

Head has been lightly ported ( cleanup of casting texture).

Standard cams and valves, inlet, throttle body

550cc RC tech injectors.

Would anyone have a reasonable AEM program to get me started? I can scale for injector size change. I will tune on a dyno, would just like to fastrack the process if possible as I'm going to be racing this engine in just over a week.

Chris.

 

To get going I would just use the F20C base map and:

Ad 20% fuel (after scaling for injector size)
Pull about 8 degrees timing
Set rev limiter to 8000 rpm
lower Vtec to 4500 rpm

 

Thanks, spent this evening getting the AEM and techedge A/F installed. I scaled the basemap for injectors plus 20% for capacity. It was pretty close. I got it to be a little on the rich side.

I had to remove a lot of timing in the light load parts of the table as it rattled on light throttle at low rpm. Once driving I didnt get any readings on knock#1 voltage. Does the base F20C file have this correctly programmed in?

Even with a rpm max of 6000rpm while I'm running the engine in the F24C flies. My car is only 600kg, and when vtec kicks in at 4250rpm its just starts wheelspinning. ( R spec tyres too).

I'm still trying to get my head around the AEM automapping. I can get the automap fuel log table to fill with values, and have used automap parameters similar to that in the AEM documentation. I can hold load points for many seconds but it doesnt seem to alter the fuel table. I did notice about 3 cells change from brown to yellow. I also tried to select "program changes" from the automap log table but it didnt seem to alter the fuel table.

Had anyone got the automap to work. I ended up using the values from the automap log file and manually adjusting the fuel table.

I'm warming to the AEM, though I'm still trying to get my head on the same wavelength as the developers. I've lots of experience with Motec/Autronic and the AEM is a little different.

Chris.

 

The Knock#1 voltage does not have any thing to do with the map, it is the same for all maps, and you should look out for spikes on 2,0V or more above the general engine noise.

The AEM has a knock control function, where you define an acceptable knock voltage at a given rpm and how much timing it should pull if the voltage goes above that.

I have tried the auto mapping function and I don

 

pwl, did you get the dry sump to fit the engine or was it necessary for lubrication??

 

Maluch, well I got it for both, for a peace of mind with the lubrication and for the extra few cm of reduced engine height. The height advantage when using a dry sump is only about 3-4 cm, because that the bell house of gearbox sits so low, but it is possible to modify the bell house to gain another 2-3 cm.

PWL