2002 Intrepid ES ECM swap questions - R/T or 300m Special?
Hey guys. This might end up being a silly idea, but I've been pondering it for awhile and thought I'd pursue it.
I remember reading somewhere on these forums that the ECM's for the R/T and the 300m Special are programmed for more aggressive throttle responses/gear changes/overall more "sportiness" (whatever that might entail.) Sounds nice, if true. In the last year, I've fitted a low restriction air intake and dual exhausts to my 2002 ES 3.5, and while those did make noticeable improvements to low-end grunt, it seems like an engine computer with sportier programming would... be even better.
I clearly don't know what the hell I'm talking about - however, I think there might be something to this. Before I even think about doing anything based on this largely uninformed hunch, I have a few questions for you guys:
Is any of this true? Are the R/T and 300M Special computers programmed any differently from the ES? Would it be at all worthwhile to swap them?
I am aware (I think) that the 2002 and later LH cars have just one unit controlling all of the engine and transmission management stuff. Thus, it seems like a relatively simple matter to swap the units so long as I get one from a 2002 or newer car. Are the wiring harnesses and mounting the same between the ES and the R/T or 300m units?
Also, I know that there are differences between the HO and standard 3.5's, specifically a little electronically controlled intake valve which opens at high RPM's to deliver more awesome. I know that somewhere on the computer wiring harness there are wires to control this valve. Will an HO computer even work with a standard 3.5, given that it lacks this valve?
Thanks for putting up with a barrage of what might seem like obvious questions.
Last edited by Superhands; 12-14-2013 at 10:46 AM.