Problem is that most of those a-holes only do destructive sh it, not constructive.

 

Its a shame that the computer is so oppressive. The Hemi seams like a well engineered motor capable of big power if it was freed from the computer.

One would think the DC made the computer so non-user friendly so that Mopar can come out with its own chips that would work better then anything else on the market. They will have corned the market on aftermarket. So it begs the question why hasnt Mopar came out with any performance parts yet... . .

 

No doubt GV! There has been talk of a performance computer from DC but nothing has materialized. Latest info says no performance stuff. They are even doing away with the 7/70 powertrain warranty and going to a 36/36 like most others.
Most rumors say certain engine and tranny parts cannot hold up long term to higher HP abuse. Who knows, they are secretive about everything...

 

Its all about money. The more performance parts available, the more it will cost them in warranty work. I can guarantee you that our GM trucks wouldn't have near as many options if the vette and fbody cars weren't the same engine and computer system. Thats been a huge help.

Maybe with the new Charger and other V8 DC cars, the aftermarket will start putting more effort into cracking the current DC computer system.

 

Yep, I totally agree Richard. GM did the smart thing by pre-engineering the GenIII casting for more flexibility. Means there is less R&D required and more sales potential for the aftermarket companies.
There are definitely more 5.7L motors running around now with the 300C, Magnum, and now Charger. Bummer is the mulitple different computers, speed density programming, and self-learning or self-cancelling coding. Makes modding a pain. Superchips and Hypertech are making progress slowly but surely.

 

Do both the spark plugs on the current 5.7 fire at the same time?

What other semi-current V8 OBD2 compliant DC vehicles have full aftermarket tuning support? Not just handheld programmers, but complete custom tuning at speed shops?

 

Actually the DC 5.7L motors are OBDIII now. Another hardship for scanning engine management parameters. We had STFT and LTFT issues with our turbo kits since we use an extra injector to modulate A/F, which caused low speed and part throttle "bucking" and code setting.
The spark plugs do not fire at the same time. Each coil fires the primary plug and a secondary plug at the same time tho. The secondary firing occurs on an opposite bank cylinder on or near the exhaust stroke. Helps with emissions, a problem area on the early engine development. Some folks are modding the wires so it fires both plugs at the same time ( just re-route the secondary wire to the same cylinder ). Dyno has not shown any power improvement, but it seems to help throttle response.

 

Wow. So a big part of the problem is that the computer is actually ahead of its time. OBD3 isnt mandatory until the 2008 model year. Since none of the other manufacturers are OBD3 compliant yet there is some logic in DC holding its hand close to the chest. If DC has had OBD3 on the market for a few years now in really world testing they do have an intellectual property to protect. Having an open code would leave them wide open to industrial espionage

 

chryler computers are difficult to work with try to get an aftermarket scan tool that will do have as much on a chrysler product as it does on a newer model gm. GM has the tech 2 chrylers scan tool doesn't compare to the info that the tech 2 provides to tech working on the car.

 

Interesting, I did not know the OBD3 info. My lesson learned for the day.
Makes much more sense why DC is so reluctant to share the computer coding...