I need some advice from the pros: I'm swapping a 96 LT1 and 4L60E into my 55 Chevy. It will have the LT4HC and 1.6RR, ported heads and headers.
1. Should I have the PCM converted to OBDI? What advantages will I have going that way?
2. I think OBDII used 2 O2 Sensors, right? Will switching to OBDI eliminate the need for a 2nd O2 sensor?
3. I intend to remove the VATS, EGR, and AirPump. Will I need to change anything else?
4. What is LT1 dit or other software good for? Is it for checking and reseting trouble codes, or can it be used to reprogram the PCM?

Thanks,
Tim

 

you can delete the 2nd set of o2s and every thing you listed w/ edit.
but if the mods listed are really the only ones. you may want to try someone like MADWOLF or Ed and have them do the changes and stuff for you..


edit/tunercats is used to change the PCM data (shift points,timing etc..) there are scan tools for trouble code/sensor data (freescan/datamaster for odb1s)

hth
RS

 

Tim,
if you plan to do some tuning and/or datalogging yourself later on, the OBDI conversion is the way to go.
Otherwise, the programmed OBDII will do just fine and save you a little bit of money too.

If you go to OBDI, there is no need for rear o2 sensors and no need for the crank sensor stuff.

HOWEVER, you can disable all those in the OBDII programming as well, so it's really up to you.

Same thing for the other devices you mentioned. VATS/EGR/AIR can be disabled in the OBDII also.

Just for a comparison, my OBDI conversion price is $225 + shipping and the OBDII programming is $125 + shipping.

 

Ok, thanks for the info. I'd like to do some of this myself, and probably would like to do some tuning later, but I'll probably send it out for reprogramming, as long as I can get an aftermarket harness for a 96. I think Painless makes one now.

Madwolf, I'll probably email you in a few days to discuss the details.