I removed my AFPR about a year ago because once I started tuning I found I didn't need it is there any reason I need ot if I am installing a wet kit? I plan on installing a 125 shot wet kit and having a Nitrous only tuned ECM so I can maintain my stock ECM for every day driving and have a nitrous ECM that will be a bit fatter with fuel and have timing pulled for WOT in the RPM range the window switch will be set for. Can't I just change fuel jets and add or subtract fuel to the PE table to get the proper A/F instead of messing with a AFPR?

 

Yes, you can play with the fuel jets to get the desired AFR.

Question: Why run a second PCM and swap them? Why not get an ignition box that has a timing retard feature, and do all your fueling changes with the fuel jet?

 

I have the Delteq system and I believe the only box that will work is one of the MSD products and it requires a bunch of expensive modules to make it work (want to say around $800). I have a spare ECM and it only takes about 5 min to swap.

 

Fair enough. I didn't notice the Delteq in your sig.