On top of that, the turbocharged DET engines received connecting rods from the RB26DETT and an upgraded 45V3 turbo with a larger OP6 turbine. Changes were aplenty NEO engines featured solid lifters instead of hydraulic lifters and revised camshafts with an on/off solenoid Variable VCT.
#R34 gtt fuel consumption series
Series 2 engines received a new airflow meter, mass airflow sensor, camshaft position sensor, throttle position sensor, crankshaft position sensor, and an updated ECU.īut, other than the slightly different camshaft designs, there weren’t any mechanical differences between the series 1 and series 2 engines.įast forward to 1998, and Nissan introduced the new RB25 NEO, available to both the turbo and non-turbo engines. The newer 45V2 turbocharger used a ceramic turbine wheel instead of the aluminum wheel found in the V1. The newer engines featured upgraded ignition coils with built-in ignitors and a new turbocharger for the 25DET. Nissan revised both the RB25DET and RB25DE in 1995, releasing the second series to the market. The RB25DET weighs around 189 kilograms or 417 lbs and holds 4.3 quarts of oil with a viscosity of 0W-30 (for colder climates), and 5W-30 (for hotter climates). If you’re wondering what the naming sequence stands for, the “RB” in RB25DET is the engine series while 25DET stands for “2500-cc DOHC Electronic Fuel Injection Turbo.” All RB series engines, including the RB25DET, are interference engines manufactured in Yokohama, Japan. The RB25DET shared fairly similar internals but was offered with larger injectors, improved pistons, reinforced connecting rods, and a bigger 45V1 turbocharger. The inline-six engine displaces 2,498-cc with four valves per cylinder, twin camshafts, and an aluminum cylinder head. But the 25 series came with a larger cylinder diameter of 86 mm, a piston stroke of 71.7 mm, and new connecting rods and pistons. RB25 engines used a similar cast-iron cylinder block to its predecessor, the RB20. The non-turbo RB25DE made roughly between 180 and 200 horsepower, depending on the engine series. Versions after 1993 made use of variable valve timing (NVCS) on the intake side, adding more power and torque. The RB25DE was introduced in 1991 and powered the R32 Skyline GTS25. The RB25 had four iterations during its time in the market: If you didn’t know, the RB25DET is a factory turbocharged version of the RB25DE.Įverything else is pretty much identical except for the power ratings, of course. Torque: 235 lb-ft 4,800 rpm (RB25DET), 267 lb-ft 3,200 rpm (RB25DET NEO)īefore we go on to understand the RB25DET, let’s briefly look at the RB25DE.Layout: Inline 6 cylinder Turbocharged DOHC 24V.Photo: 2000 Nissan Skyline R34 GTT, by Cjp24, CC BY-SA 4.0
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