Blue Star VD600-03

Overview#

The Blue Star VD600-03 is a 600-kilowatt EPA Tier 2 diesel standby generator built around the Volvo Penta TWD1644GE — a 16.1-liter inline-six that introduces dual-stage turbocharging and water-to-air charge air cooling to the Blue Star Volvo Penta lineup. This is a current-production active model and the third generation of the VD600 platform.

The "TWD" prefix distinguishes this engine from the "TAD" family used in the VD230-550 models. The dual-stage turbo and water-cooled CAC allow the TWD1644GE to extract 917 HP from the same 16.1L displacement, with a dual-circuit cooling system that requires significantly more coolant (39.9 gal vs 15.9 gal).

The Volvo Penta TWD1644GE platform#

The TWD1644GE represents a step up in engine complexity:

• 16.1L inline-six — same displacement as the TAD1640-1642GE-B family, with bore of 5.67 in and stroke of 6.50 in
• Dual-stage turbocharging — two turbochargers in series for higher boost pressure and power density than single-stage models
• Water-to-air charge air cooling (H2O to Air CAC) — more effective intercooling than the air-to-air CAC on the TAD models, enabling higher sustained output
• Dual-circuit cooling system — separate circuits for engine coolant and charge air cooling, totaling 39.9 gal system coolant capacity
• Steel pistons — heavier-duty than the aluminum pistons on lower-output variants, for thermal durability at high boost pressures
• 4,920 ft altitude ceiling — rated power available to 1,500 m

Variant selection guide#

The VD600-03 bridges the 16.1L and 17.3L Volvo Penta engine families:

• VD550-01 (550 kW, Volvo TAD1642GE-B 16.1L) — simpler single-stage turbo design, smaller footprint (140 x 72 in), lower coolant volume. Choose this if 550 kW meets the load study.
• VD700-01 (700 kW, Volvo TWD1744GE 17.3L) — larger displacement, Common Rail injection, 100 kW more. Choose this for loads above 600 kW.

When to spec the VD600-03#

• 480-600 kW continuous emergency standby loads on diesel fuel at sites below 4,920 ft elevation
• Large industrial and commercial facilities: hospitals, data centers, manufacturing plants, campus power systems
• Applications where EPA Tier 2 is permitted for stationary emergency standby
• Competitive bids against Kohler, Cummins, and Generac units in the 500-750 kW class

Our service experience#

The TWD1644GE introduces dual-circuit cooling — a meaningfully different service profile from the single-circuit TAD models. The 39.9-gallon coolant capacity requires more fluid during initial fills and coolant replacements. The dual-stage turbo system has additional oil feed and drain lines that must be inspected during routine maintenance. The water-to-air charge air cooler adds a heat exchanger that doesn't exist on the air-to-air models, but it also eliminates the large charge-air-to-ambient radiator surface, which can simplify enclosure design. The DSE DCP7310 controller and Stamford alternator maintain parts commonality with the rest of the Blue Star lineup.#