TURBO CHEROKEE

[SilverXJ]

AEM FIC6 is a better option over the FTC1. FCT1 either screws with your map sensor, and/or uses a goofy 7th injector setup. The FIC6 directly intercepts your injectors.

[collin430]

I think that the Split Secont FTC1 or the AEM FIC would do it. They both can control bigger injectors or extra injector and timing.

Thats what i was thinking also, thanks!

[jsawduste]

Why band aid when you can change to OBD2 and have the cal flashed to represent FI ?

Take a 96 + Cherokee and swap the harness and ECM out. Make up your own signals for the gages.

This way you can adjust for enrichment delay, long and short fuel trims, timing map and so on. The piggy back stuff only changes the inputs/outputs but does nothing for the fuel/timing curve(s) or the delays.

[SilverXJ]

The piggy back stuff only changes the inputs/outputs but does nothing for the fuel/timing curve(s) or the delays.

Not quite right. The AEM FIC can change the fuel curve (+/-) as well as reduce timing. It doesn't mess with the MAP like most others.

[jsawduste]

The piggy back stuff only changes the inputs/outputs but does nothing for the fuel/timing curve(s) or the delays.

Not quite right. The AEM FIC can change the fuel curve (+/-) as well as reduce timing. It doesn't mess with the MAP like most others.

Thanks Chris for the info. I was thinking the AEM was just another add on that played with the MAP voltage.

Still betting that the enrichment delays that are built in the OEM cal carry through with the AEM ?

Reduce timing but not add.

[2tKTM]

If you do go the AEM FIC route make sure you pick up the 1913.

I made the mistake of picking up the 1910 which is meant to control a 7th injector in the intake manifold. No big deal though, it is perfectly useable it will just throw a CEL for the missing injector.

I am using 42# injectors in my build, however I will be boosting my 4.7l stroker + meth injection. 36# should be good for your needs.

The way the AEM FIC works (correct me if I'm wrong) is it let's the factory computer deal with what it normally does, and then it modifies injector and timing signals by adding/subtracting voltage after the factor computer sends the signal out. The FIC also clamps and modifies feedback voltages back to the factory level so the computer does not get confused.

So, the AEM FIC keeps the factory computer from seeing the increased demand of boost. You could say the original computer runs the motor, and the AEM modifies its signals while hiding the boost levels from the factory computer.

So basically you would be tuning on top of the factory computer. In my case (OBD2) I will be tuning on top of the JTEC computer. Some people dislike having to fight with the factory computer (since it still has the ability to adjust fuel trims and what not) and opt for a full on stand alone computer for more "real" tuning.