chevrolet all the way

iTrader: (24)

This.

everything has to be spot on and any small changes will not be corrected. weather changes, possibly slightly different fuel, etc. if you use closed loop then that will all be fixed through the o2s.

with that said i daily my truck with no o2s. ive thought about running closed loop, but would have to add pins back and rewire to the sensors so i havent done it yet haha.

minytrker

iTrader: (13)

With EFI Live you can enable lean cruise with a cax file. Its a true lean cruise and you still have CL fueling like normal. The catch is you will be on OL in the areas you set up lean cruise in. Lean cruise does work but I have always used a WB to set it up, it takes a good bit of data logging to get it dialed in perfect. You will adjust everything through the lean cruise tables. The other way to do "lean cruise" with efi live is use a custom operating system and in cruise areas command a leaner a/f than stoich, the pcm will then ignore the o2 sensors in that area of the fuel map. Both ways are basically doing the same thing.

Isak81

I have EFILIVE and the more I read about each program the more I feel that i picked the easier one to use.

oakley6575

iTrader: (5)

HPT here. Love every second of it

minytrker

iTrader: (13)

I have both and it really depends on what your doing on which one is easier.

HPT and EFI are both great tuning tools. They are only as good as the person using them.

Fast355

HAHA, reminds me of what I did with my Hemi Ram with SCT. The factory did not have any kind of lean cruise in the fuel mapping so I made my own. It had to reach closed loop or it threw codes so I couldn't disable closed loop. However I found that if I only allowed the PCM to enter closed loop at idle and low/low part throttle cruise it would run without throwing codes. So I enabled PE at less than 10% throttle and adjusted the PE air/fuel vs MAP vs RPM mapping to my liking. The PE table did not allow for air/fuel mixtures leaner than 14.7:1, but that is what my wideband and the VE tables were good for. Running 17:1 air/fuel ratio at low loads with my 4.56 gears I was knocking on 20 mpg highway at 70 mph.