Hello I have a 1998 Dodge Ram 1500 that I just installed a new 6.7L/408cu in Magnum engine into.
[email protected]/.515 lift cam, 32 lb/hr injectors, long tube headers, Cat delete, 3" dual exhaust, orignial intake manifold, Flyin' Ryan ported throttle body.
As I said in the title, I'm new to JTEC, not new to tuning. I have a 2012 Dodge Challenger with a 426 cu in, Whipple supercharged Gen III Hemi that I tune. It runs low 10's in the 1/4 mile and I can drive it on the street. I have a good handle on NGC3 (I think that's the system) As a result I tend to think in terms of tuning the modern Challenger.
The questions I have are related to fueling. Spark seems pretty straight forward as I adjusted the spark timing long before the new engine install, so I have an understanding of that.
Questions I have:
What table/tables/etc affect or control closed loop fueling?
What table/tables/etc affect or control open loop fueling?
What controls/sets the closed loop AFR/FAR?
What controls/set the open loop AFR/FAR?
I've found the Open Loop/Base tables (EGR on and EGR off) but when I adjust those my results are not obvious to me and I'm not really sure when these are used.
Right now my plan is to force the ecu into open loop and use my wideband AFR gauge to try and adjust things like a carburetor.
I could use some help understanding the basic premise behind the operation of JTEC ecu's and help understanding which tables affect the fueling described in my questions above.
Any help is appreciated!
Rich