Stock vs Walbro fuel pump tune with BOE REV300
I have a 2005 Elise with the BOE REV300 supercharger kit (stock fuel pump, stock cat, stock exhaust).
I think my stock fuel pump is failing. (Often doesn't operate when I turn the key on (no fuel pump whine when it isn't working, but do hear the relay click), and the engine stalls soon after starting when there is no fuel pump whine at startup. It is now doing it sometimes while driving even though it was working for a little while. There is a chance it is an intermittent fuel pump relay problem, which I will diagnose this weekend).
If I confirm it is the fuel pump, I am considering replacing the stock fuel pump with the Walbro 255 pump. However, I need to know if my current ECU tune for the REV300 will work fine with the Walbro pump, or if I need a new tune. (The higher pressure at high flow rates from the Walbro could make it run too rich at high throttle, unless the ECU can learn to compensate. But, at high throttle, I thought it ran open loop, so no learning.)
Does anyone know if I would need a different ECU tune with the Walbro? (I tried emailing BOE a few times, but didn't get an answer.)