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Message: <blockquote data-quote="sakuraguy" data-source="post: 1628046" data-attributes="member: 6441">RB30Three models of 3.0L RB30 were produced:RB30S - carburetted single-cam RB30E - injected single-cam (114kW) [3] RB30ET - injected single-cam turbo The motor is a cast iron block with an alloy head, and a SOHC at 86x86. This motor was produced because the Holden 202 (3.3L) powering the Holden Commodore could no longer satisfy emissions requirements, and with all new cars required to run on unleaded petrol by 1986, a quick replacement was needed. Nissan Motor Co. teamed up with GM to build their biggest displacement RB, the 3-litre RB30E. The RB30ET was only found in the VL Commodore. The RB30S was found in South African R31 Skylines. The RB30E was found in R31 Skylines and VL Commodores.RB30DEThese rare engines were used in the Tommy Kaira M30 based on the R31 Skyline GTS-R. It delivered 177 kw @ 7000rpm and 294 Nm @ 4800rpm. Apparently the engine was made up of a RB30 bottom end mated to a modified RB20DE head. These engines also exists as a hybrid conversion using a RB30 bottom end and a RB25DE head.RB30DETRB30DET - R31 RB30E block, R32 RB25DE head.Nissan did not produce this engine, but it refers to a turbocharged engine featuring an RB30E block with a twin-cam head conversion. Common hybrid in Australia using a RB30E bottom end mated to a RB25DE cylinder head and turbo. The RB25DE cylinder head from the R32 Skyline, A31 Cefiro or C33 Laurel can be used. The RB25DET (from the R33 Skyline or C34 Laurel or Stagea) head is also used, however an external oil feed must be fabricated for the variable cam timing on the RB25DET which further compicates things.http://img372.imageshack.us/img372/3328/543pxrb30det2xy7.jpgAlthough it has a larger displacement than the RB26DETT, maximum possible horsepower is less, as the RB30 block lacks the RB26 block's internal cast-in bracing, and consequently cannot rev as high due to harmonic issues at ~7500RPM. To compensate, the RB30DET produces more torque at lower revs. There is also an 'RB30DETT' kit manufactured by OS Giken of Japan, which bolts an extension on top of the RB26 engine block, and fits liners, to give a 86mm bore x 86mm stroke. It is available as an assembled short block, containing billet chro-mo crank, billet chro-mo H-beam rods, forged pistons, and costs ¥1 500,000.</blockquote>

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