I'm interested in the technical details of the vehicles computer system, what sensors it uses, known operational values, whats been tried, what works, what doesn't, etc... If you can answer a question, please do so, and the more valid technical info, the better. Ok Dodge guys, time for 20 questions:

(I'm using the the acronym PCM for powertrain control module, often called the ECM or the computer. Not sure what you DC guys call it.)

What are the current choices for Hemi tuning?
What works and what doesn't?
Is the current PCM for the Hemi the same as it was on models prior to the hemi?
Do the SRT trucks use a similar PCM?
What sensors are monitored by the current dodge PCM? MAF, intake temps, O2s, etc..
What size fuel injectors come on the current trucks?
What alternative computers have been tried and tested as replacement for the current computer?
What options are available for data logging the current PCM?

As I see it, even running something like a FAST system would only be a band-aid fix.

 

1. For 2003 Hemi Ram: Jet Module, Hypertech and Superchips. 2004 Hemi Ram: Jet Module, Hypertech. 2005 Hemi Ram: None.

2. NOS, NOS and more NOS. I have six mods, they are on my signature and increased my RWHP from 262 to 292, RWTQ from 278 to 323.

3. 2003 Hemi has a 16 bit PCM. 2004 and 2005 have a 32 bit PCM. Judging by the amount of time that Superchips and other manufactures took to release their products, they are different from older PCMs. The PCM is always learning meaning that if you drive it like you stole it you'll get the power. If you baby it, the dog comes out.

4. Don't know.

5. We have a Speed Density System instead of a MAF, knock sensors, precat and post cat O2 sensors and torque management of hell.

6. Don't know.

7. No one has crack the code completely so I don't think they have a performance PCM. I read of a DTW member that used a TEC3 standalone and got great results with a turbo. He did loose some stock functions.

8. I will reasearch the data logger.

 

It probably wouldn't be that difficult to run an aftermarket engine system that allows you to adjust fuel and spark to metered air. That just leaves such a hole without the ability to adjust transmission parameters, alter sensor values, modify emissions properties, etc.

Anyone know how different the older Magnum V8 computers / wiring harnesses are compared to the new ones? What are the tuning options for the older models? Anyone swapped to a differnet DC V8 vehicle (like a Jeel GC), another brand PCM or an older model?

 

Will the FAST computer work on the Hemi by chance???

 

Not yet. Comp cams is working on the FAST as we speak. I don't know why you couldn't just unplug the engine management wires and leave the stock PCM in place to control the rest of the car's functions.

 

From what I heard with the turbo guy running the stand alone computer, he still has the stock pcm in place to control things like the abs. The electronically controlled tranny would be the tricky one to control I would think.

 

What about the Big Stuff 3? It might be another option for a standalone. I'll have to ask Kurt @ Wheel to Wheel and see what he thinks.

 

I cant wait for them to come up with somethin like hp tuners for the hemis, I think theyd be smokin but very tempermental

I heard about a stock srt-8 running 12.99!! a damn station wagon

 

Perfect Power has the SMT6 available for tunning, mostly fuel/timing tunning only. One of my best friends that had some major head porting had to go to this system to correct his A/F conditions. Another guy I kinda know from DTW is using one in conjunction with his turbo, he has got great results from what he says and loves it.

 

Good thread. I have nothing to add, but I think this is a good thread. I would like to know where you're going with this though. You plannin on tradin in the SS?