I've been thinking Marks spreadsheet is a guideline, to help figure out an appropriate injector for a given engine application. IMHO, the practical limit for two 90 lb TBI injector is about 400 HP +/- 5%. I think the calculations in Marks spreadsheet help both the engine builder and EFI Tuner understand what would be required from the EFI system on a performance engine. The old saying, "Do the Math", IMHO Marks spreadsheet does the math!
dave w
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