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← Mack Trucks Econodyne engines

Mack Trucks Econodyne AC-400 12.0 405hp (298kW) 1979Nm

I (1990 - 2005) · 405 hp
Stage 1
OriginalAfter tuningDiff
Power hp405 480 +75
Torque Nm1979 2370 +391
Power gain
+19%
Torque gain
+20%
Fuel economy −9%
Before
27.0 L / 100 km
After tuning
24.5 L / 100 km
Saves ≈ 2.5 L / 100 km — about 2 513 L (over 100 000 km) ≈ €4 398
Estimate for a typical duty cycle · real saving depends on load & driving style
Ready to feel these +75 hp on the road?
Get your ready-to-flash Stage 1 file for the Mack Trucks Econodyne
Order tuning file →
Stage 1 file from €120
Exact price depends on the ECU — confirmed when you upload the file
✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included
Power graph / Stage 1
PowerTorqueStock
dyno graph