Nissan ECU Tuning

lazer · Joined: 09 Dec 2003 Posts: 21 Location: Las Vegas

I've got a SGP stage 4 Z32 TT. I recently installed an SAFC and have been playing around with it's ability to monitor the Airflow signal. Now at 7,000 RPM's its reading 56% Airflow (which I assume is a % of voltage based on 5.12V). Assuming that the voltage would be 2.87V which works out to around 10242 VQ (pulling from VQ table). Now I tried to figure out the TP and here is what I got (370cc injectors)

288*10242/(7000/50*256)/6 = 13.7

Now that really doesn't make sense to me. At wide open throttle boosting 15 lbs the airflow would be barely enough to get to the second column of the ignition and fuel tables?
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Samuel Lazerson
1990 300ZX TT (PGY) Stage 3

lazer · Joined: 09 Dec 2003 Posts: 21 Location: Las Vegas

OK figured it out. The % value displayed on the SAFC is a % of the VQ table value not a % of the voltage output by the MAF. So redoing the math I get a TP value of 46 which is much more reasonable.
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Samuel Lazerson
1990 300ZX TT (PGY) Stage 3