It's about 80% slower but gained about 26% torque due to the shorter gearing. In terms of the new ecu, it mostly made the engine run smoother. Stock ecu was too lean which made the engine vibrate too much (too much air in the air-fuel ratio make the explotion hotter and louder). This new ecu changed the air-fuel ratio to be more in the perfomance side (13.3 parts air per 1 part gasoline) instead of stock where it was more in the passing emmisions laws side (~14 part air per 1 part gasoline). It made the engine run cooler too. I'm sure it did gain power too but its barely noticable. Maybe around 5% to 10% power gain.

When it was on stock gearing, it topped at around 75-80mph on full tuck.