I have installed the new Novi 1220 SL on my TFS TW / F-303 / GT-40 Intake. Im gonna run this with # 30 injectors and the FMU. (Dont tell me to get the 42's and a tune !! Its gonna stay like this for now.) 70mm TB, 80mm Maf, 255 LPH high pressure fuel pump with a kirban fpr. I need help with the timming and the fuel mixt. I have a wideband for the fuel, i maid the best N/A power with numbers around 13.50 and 34 total timing. All this with the stock 1993 EEC. Now, with 5-6 psi from the blower, what timing and fuel mixt should i run. Thks !
Your going to need a way to adjust your tune via the computer, not the fuel pressure. The fuel pressure will re-tune to be at 14.7:1 during closed loop operations regardless of fuel pressure. As far as the numbers go, I'd retard the timing by 1 to 2 deg per lb of boost. I myself am running 27* total with 8lbs of boost (intercooled) with the same heads. As far as your afr's go…your going to want to be in the neighborhood of 11.5:1. Keep in mind though…doing it with your fuel pressure (unless your adjusting the fmu) is not going to get the job done.
Im gonna use this valve on the vac hose that go the to fmu to tune it. With this valve, you can lean the mixt by limiting the boost that go in the fmu.
