Stage 2 Engine Software is for use with the Dinan Oil Cooler, optimizing performance and drivability from the combination.
Dinan Stage 2 Performance Engine Software safely increases turbo-boost pressure, along with properly retuned fuel mixtures, ignition timing, and full map rescaling. Dinan's software also removes the top speed governor so the BMW will be capable of achieving its "natural" top speed. Producing substantial increases in power output while maintaining the civility and reliability expected of a Dinan performance product. In an effort to more effectively control oil and water temperatures, the Dinan software actually increases water pump speeds as boost pressure increases. And as always, Dinan matches the new car warranty coverage for up to 4 years or 50,000 miles including the possibility of consequential damages. No one offers better performance or backs it up with such comprehensive warranty coverage.
Increased boost pressure exceeds the turbochargers' design limitations at higher RPM, potentially shortening their lifespan. Dinan addresses this issue by tapering the boost gradually at higher engine speeds. This approach also addresses the fact that with increased boost at higher RPM the turbocharger temperatures would exceed the intercooler's ability to cool the intake charge, resulting in a loss of power and compromising the long-term durability of the engine. The tapered boost keeps temperatures within the design limitations so as to optimize output and ensure engine reliability with the added boost pressure.
More Power: Max gains of +56 HP @ 4000 RPM and +73 lb-ft TRQ @ 4000 RPM
50 State Emissions legal; CARB EO # D-176-37
Full map rescaling
Improved throttle response
Top speed governor removed
Properly returned fuel mixtures
Remapped water pump speeds to control engine temp
Smooth and predictable power delivery
Dinan Point Value
Factory Rated HP
Factory Rated Torque (lb-ft)
Labor Time (Hours)
Max HP Gain
56 @ 4000 RPM
Max Torque (lb-ft) Gain
73 @ 4000 RPM
378 @ 5700 RPM
Peak HP Gain
26 @ 5700 RPM
Peak Torque (lb-ft)
415 @ 4300 RPM
Peak Torque (lb-ft) Gain
68 @ 4300 RPM
This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.
The following vehicles are considered Emissions Controlled Vehicles:
1966 and newer U.S. manufactured California Certified vehicles
1968 and newer U.S. manufactured Federally Certified vehicles