left thread in computer/tuning forum looking for more responses. I'm not the tuner but i'm being told that my car is not adding fuel after 5000rpms. what to look for? Can you tune obd1 for 600+ rwhp. or not. Poss. maxed out maf.

95 z 12psi boost, 60 motrons, dual 255 in tank.

 

The most common thing to do is start adding extra fuel in the PE table after where the MAF maxes out. So the computer will give enough fuel for the air the MAF is reading and the % in the PE table can make up for the extra air the MAF is not reading since it is not maxed out.

 

94 NO TOP Z, Are you saying it is maxed out. And you can correct it by adding a % in the P E tables. I was told that the injector pulse width did not increase with rpm...........after 5000rpm

 

Could there be a problem with your pumps, wiring, or maybe a dirty fuel filter? My WOT fuel table is set flat at +15 all the way from 2000 to 6500 rpm. My A/F ratio is flat too. I've seen no evidence of a maxed out MAF at 5000rpm. You shouldn't be running out of fuel with your setup.

My car did run out of fuel at 5000rpm when I was using only one hotwired walbro.

 

Yes, after the MAF maxes out it will normally not add any more fuel since the computer thinks its only getting the amount of air the MAF is telling it. To get the extra pulse width for the injectors you can add fuel in the PE table. Like add 10%@5000, 15% @5500, 20% @6000, for whatever it takes in the PE table.
My MAF would max out about 450RWHP.

 

As had been stated, the stock PCM can be tuned to work fine with a maxed out MAF.

Rich