Hello to all. I'm looking (unsuccessfully) for an AFR Base Table for first start up of a 13b n/a. Little back round first, I have a 1985 GSLSE that I've been trying to resurrect and about two years ago, I had the intake temp sensor take a dump. Well to my surprise you can not find a new IAT sensor and did not want to go with a used IAT that has unknown issues or how long it will last. So I did the next best thing, change the ECU to MS3 Pro Mini and replaced all my sensors with rife sensors that have use Deutsch connectors, removed the AFM, completely changed all the fuel lines to 3/8' to accommodate -6 AN fittings and incorporate aftermarket fuel pressure regulator with rife fuel pressure sensor and removed all emissions. I also have changed the two injectors (yes the rotary is original) to ID 1050's (it was the lowest CC injector they currently had) also figured it would help with lowering the duty cycle on the top end of the injectors. Wiring was challenging since I have not rewired and repined connectors since being retired from the United States Air Force as an aircraft mechanic (all systems). Anticipated issues with the wiring so I plan on building a new wire harness with changes. which leads me to first start after programing Mini. Aaron Cake has been an inspiration to perform this task but his information is a bit old. There are new variations of MS3 Pro like the Mini that has only 35 wire single plug and not to mention new updated Tuner Studio programs that either added to or removed from the required inputs for the ECU. On Aarons web site (https://www.aaroncake.net/RX-7/megasquirt/ProgramMS3X.asp) the AFR table is missing or can not connect to it which brings me to this. Does anyone have a AFR table for first start for an 13B n/a? I've look everywhere but no success.

I did manage to get it engine to fire up and run for about a minute then died and could not get to refire. So I was going over everything I did for programing and even re down loaded the Aaron Cake Download MS3X FC 13B Base Map (20KB, .ZIP) file and replaced it in the ECU. I did notice I was missing the AFR table. Yes this is my first programing of an ECU, any and all help would greatly be appreciated.


A little bit more about my GSLSE project. I'm currently in the process of rebuilding a Miata trans mission (MazdaTrix) style (input shaft is milled) and have a set of Walter Motorsports Carbon/Moly Syncros so the trans with tighter gear ratio will help the quickness of the car since it is not a Turbo. also getting ready to build a S5 13B n/a because I'm not sure of the state of the current engine other than it has great compression (low 116 high 121 PSI) on both rotors plus it was the highest hp of the n/a 13B's. My car sat for 7-10 years before I bought it (I'm the third owner) and when I got it started for the first time, I did not clean out the fuel tank (full of crap) that got sucked into the injectors and ever since 2015, it has not quite been right. Several T3 upgrades (front suspension minus big brake change due soon) front and rear adjustable coil over shocks and awaiting of the T3 rack swap once they figure out how to connect the rack to the steering column for non power steering (they have one to replace power steering equipt cars.

 

you can make your own afr table. you would watch your wideband and add or subtract fuel as needed to get it to idle. once its idling, everything after that is........cake.............. aaron cake.
if anything, set the whole table to 13.0 and work from there

afr values for low load and idle are not that critical and you can have it running while you figure out where its happy. what's more important is that you set your dead times for the 1050x appropriately. injector tech has come a long way so even with an injector of that "size" it will idle smooth and happy as if it were a smaller size. so yes, you just gave yourself a lot of headroom. your target afr for idle will be likely be in the 12-13 range but every motor is a little different. just get to hum cleanly and you'll be fine.

 

Thanks for the info. It helps keep me going on this project knowing I'm not far off from having my 7 back up and running and knowing I did not put to large of an injector in. I will work on the car this weekend and hopefully not get discouraged if I cant get it to fire.