I have to stick by the stock pcm. After all that I have done, the system will still run just fine by itself without any modification. It even adjusted to the 24# injectors with no problem other than long term fuel trim being trimmed back by almost 20%. If you want additional tuneability, then the SAFC or the eManage are low cost additions. I love being able to play with the AF maps on my GReddy and swap out injectors and MAF's of different types at will. Being able to add a few milliseconds to the injector pulse width at any rpm and throttle position is really nice too. The GReddy eManage also has a scaling factor so that you input the factory size injectors and then the new size injectors, and it computes the rescaling automatically. As a check, I monitored the long term fuel trim, and it is 0-3% when I use the GReddy.
BTW, I am still working on the ignition timing aspect of this GReddy module. I have been having some bumps along the way, but I have made progress. Eventually I will get it working and then I will be able to jack up the timing.
These are all points you may want to consider before busting your azz wiring in a new computer. We can all swear to the fact that you probably wont need to.
Of course, it would be nice for a comparison.
The stock 3L is rated at 200ft-lbs torque/200HP, both at the crank. My engine is making about 195 ft-lbs peak torque at the wheels right now as of my last dyno run, that is complete street trim (full exhaust). The stock motor without modifications (manifolds, etc) will undoubtedly make less power.
Another factor that you aren't considering, I am running essentially the same compression as a 3L motor because I intended originally to supercharge the motor, whereas DavidZ is running 11:1. That itself is about a 10 HP gain at least.
There are too many factors, but if you look at all the engine projects done to date, the best ones are with very good breathing characteristics on SVT equipment. I only know of three 3L engines that have broke 200 wHP, DavidZ, Shoshop, and myself.
To evaluate the breathing characteristics,take a look at the motors. The Shoshop opened the hell out of the intake system but used the stock 2.5 valves and SHM headers. DavidZ used 3L valves and MSDS headers.
I made 217 wHP without headers and without the higher compression, and I believe that this is a testament to the work that I did on the heads and intake system. I also believe that I will see big gains on the motor once the headers are installed.
After all that, I have to just tell you to think on all this information a little longer before you finalize your plans.
warmonger
