Join Date: Apr 2010
Ferrari Life Posts: 2,206
Great, we'll look forward to hearing how you like it. Some (notably Dave & myself) found the FHP to be a bit too heavy at low speeds, so if you find that to be so, let me know and we can sort it out with a custom curved ECU.
To understand this better, here is a graph showing the curves that are programmed into the Stock ECU, the FHP ECU (which we call our Sport), and our Custom ECU. This graph, although not scaled, has speed on the “X” axis, with hydraulic P/S assist on the “Y” axis. So at the X/Y intercept (origin) which is 0 speed, there is lots of P/S boost, and then way out on the “X” axis at high speed there’s little or no boost (except with the overboosted Stock ECU). The magic of FHP and our Custom ECU is in the shape of the curve and at what speed the boost goes away.
You’ll notice that the FHP ECU’s boost drops off like a rock at a fairly low speed. This is what produces the “heaviness” feel for Dave & me at neighborhood cruising speeds (~ 20 MPH?). Then look at the Custom ECU curve – it retains the hydraulic boost to a higher speed than the FHP, but not ridiculously high like the stock ECU, and plus, it also allows it to drop off more gradually than the FHP ECU.
'99 550, Rosso Corsa / Nero, S/N:114654, Assy: 31836, Engine: 52084
High mileage, low compression, and missing on a few cylinders.....just like my cars.
Maranello Skunkworks Team Member