Quote:
Originally Posted by jamesm
Oh ok sorry I was confused. For port you use the scaler and latency, for di I believe @ mad_sb is using the di fuel pressure targets but maybe he'll chime in to confirm as I'm not 100% clear on it. |
For DI scaling you use the GDI Pressure Multiplier A&B tables. If you need 30% more fuel you multiply the entire table by 1.3. If you need 90% as much fuel you multiply the table by 0.9. If you need to fine tune a specific maf / gdi pressure range you just adjust those cells of the A&B.
For port scaling, you manipulate the scale number and the latency values. For port if you want 30% more fuel you reduce the injector size by 30%. Lets say your injector scaler is at 200 and you want 10% LESS fuel then you do (1.1*200)=220cc. If you want 10% more fuel, you do (.9*200)= 180cc. At low pulse with you adjust the latency and leave scaling as is.
The Pressure target table is just for fine tuning. Since doing my long tube headers 3600 rpm shows very lean readings no matter what i do with the fuel map so I bumped the target rail pressure in that area. Also dialed out a little bit of pressure up top to keep afr and error flat as you rev it out.