My 140 did that. I turned the fuel down to correct. Not as much acceleration speed, but I didn't blind the driver behind me any longer, which I thought was more important than a faster acceleration speed. 0-60 in 7 seconds in a 616 is impressive however and would be useable if you could do it without the smoke blinding the cars behind you. Do you think the Myna pump was worth the cost and benefit to have the pump adjusted in your case?

BenzDiesel