Club Dsport is the engine building side of Dsport Magazine. Mike comes from a engineering background, and his years of experience in the magazine industry, plus building, and pushing the limits has given him a lot of experience. He has turned this experience into an engine building side. Along with the RB26, VR38 engines for GT-R, they work on a number of other engines.
My opinion is that they are the most capable machine shop and engine builder for the RB26 in the US.
There is no other engine platform that has undergone as much development at Club DSPORT as the Nissan RB26DETT.
We’ve taken this performance icon to over 500 wheel horsepower per liter building street/drag examples that produce over 1,300 horsepower from just 2.6 liters of displacement. The key to maximum performance and reliability is a complete understanding of the engine’s strengths and weaknesses.
Strengths
Comparisons to Toyota’s 2JZ-GTE are often made with the RB26DETT. In comparing the blocks, the RB26DETT sports a much better foundation for the crankshaft featuring a full girdle design. The individual cap design of the 2JZ-GTE means that an aftermarket cap upgrade is usually in order when power is expected to eclipse the 800 wheel horsepower level. The RB26DETT also sports a unique cylinder spacing arrangement effective creating two three-cylinder engine in line with each other across and extended bridge in the middle. The extended bore spacing on the RB26DETT allows for better head gasket designs as more space is available for a variety of stopper designs. The RB26DETT block also features 12mm head bolts instead of the 11mm found on 2JZ-GTE engines.
Learn more about what they have to offer at : Club Dsport
The question you were afraid to ask, and I don't think I have ever actually answered in a post.
GTS-t vs GT-R: What is the Difference Between Nissan Skyline Models?
The Nissan Skyline is one of Japan’s most iconic performance car lineages, but within the R32, R33, and R34 generations, there’s often confusion between the GTS-t (or later 25GT Turbo) and the more revered GT-R models. Here’s a breakdown of the major differences that matter to enthusiasts, collectors, and tuners alike.
🎯 Focus: R32, R33, R34 Generations
This comparison focuses exclusively on R32 (1989–1994), R33 (1995–1998), and R34 (1999–2002) models — the generations that defined the modern Skyline legacy. Earlier Skylines and other trim variations are not covered in this breakdown.
🧩 Platform & Chassis
R32 GTS-t (1989–1993): Based on the RWD Nissan HCR32 chassis. Single turbo RB20DET engine. Lighter than the GT-R.
R32 GT-R: Based on the BNR32 chassis. AWD with ATTESA E-TS and powered by the twin-turbo RB26DETT. Wider track, aluminum fenders, upgraded brakes, and multi-link suspension.
R33 GTS25t (1993–1998): Rear-wheel-drive with the RB25DET engine. Still sporty, but not in GT-R territory.
R33 GT-R: BNR33 chassis, ATTESA E-TS Pro with active LSD in the V·Spec variant. Wider body, better weight balance, and active aero systems.
R34 25GT Turbo (1998–2002): The RWD RB25DET Neo-powered coupe, often mistaken as a GT-R due to visual similarities.
R34 GT-R: BNR34 chassis, RB26DETT, ATTESA E-TS Pro, Brembo brakes, multi-function display (MFD), and unique aero parts
🔧 Engine & Drivetrain
Model
Engine
Drivetrain
Power
GTS-t (R32)
RB20DET
RWD
~212 hp
GT-R (R32)
RB26DETT
AWD
~276 hp
GTS25t (R33)
RB25DET
RWD
~247 hp
GT-R (R33)
RB26DETT
AWD
~276 hp
25GT Turbo (R34)
RB25DET Neo
RWD
~276 hp
GT-R (R34)
RB26DETT
AWD
~276 hp
Note: All GT-R models used the stronger 5-speed or Getrag 6-speed transmissions, while GTS-t and 25GT variants used 5-speed manuals or autos.
🔍 Key Differences
AWD vs RWD: GT-Rs have Nissan’s ATTESA all-wheel-drive, critical for traction and high-speed stability.
Body and Aero: GT-Rs feature wider body panels, front diffusers(R34), rear diffusers (R34), and enhanced cooling.
Brakes: GT-Rs came with larger brakes (often Brembo), while GTS models used more basic setups.
Interiors: GT-R interiors have unique steering wheels, seats, and in the R34, a multi-function display showing engine vitals.
⚖️ Weight and Balance
GT-R models are heavier due to AWD systems, but feature better balance and structural reinforcements.
R33 GT-R in particular focused on improved weight distribution over the R32.
🔧 Tuning Potential
RB26DETT is overbuilt and responds well to boost, supporting over 500 hp with the right mods.
RB25DET engines are strong, especially the NEO version, but lack the same level of aftermarket support and durability as the RB26 under extreme use.
Summary:
If you want the iconic, track-ready AWD monster, the GT-R is the clear choice. If you’re looking for a lighter, more affordable Skyline with plenty of potential, the GTS-t or 25GT Turbo can offer real fun—but they’re not the same under the skin.
For more detailed posts on engine swaps, turbo upgrades, and legal import options, visit Importavehicle.com or follow along at GTRUSAblog.com.
Here it is, in all it's glory. The OEM RB26 oil flow diagram - in Japanese. Oil, and oiling in the RB26 has a bit of a bad rep, some true, some false. Oil Pressure Sensor.
Oil flow diagram for RB26 Rb26dett translated by Garrett
True or False? The oil pump on an RB series engine will explode if you look at it funny?
FALSE Like any vehicle, any mechanical device, there are some flaws with the RB oil pumps. If a car was running for 25 to 27 years with the original engine, original oil pump, and it breaks in a week once a new owner has it, it might not be the car. There are people out there that believe the pumps are made from glass, which they are not. For the hundreds of thousands of RB powered cars in the world, there are relatively few failures, but they do fail. Generally if they fail it is due to over revving, or shocking the oil pump. The oil pump is driven directly from the front of the crankshaft. It has to suck and push oil, something pumps don't like to do. At 8k rpm stock, the rev limiter protects the engine on the way up, but not on the way down. Right hand drive car in a left hand drive world. https://www.gtrusablog.com/2018/01/oil-pumps-on-rb-series-engine-true-or.html
This R32 GT-R oil pump inner gear shouldn't be 2 piece.
We have posted many, many times about RB26dett and oiling. The issues, how to fix them. Just recently Brian's R32 lost oil pressure at the race track. We were out doing a comparison of stock cars for a online magazine, and we were allowed to bring his car up. I told everyone if I got 3 laps of the track, I would be happy to bring the car up. We don't get much time at the track when both Ernie, Brian, and myself are there.
Brian's R32 GT-R at Willow Springs
The cool part about the day was we were on Horsethief Mile doing the testing. However Brian noticed some friends were on Big Track at Willow. Also some other friends on Streets. So in a single day, he got a chance to drive on all three tracks. It doesn't get much better than that.
Nasty gouge and heat there . You can see the powdered metal the gear is made of
This was an R32 crankshaft, so narrow pump drive.
So, honestly this is to be expected with an RB26 with a narrow pump drive and driven on the race track. This engine has about 20 track days on it. Its run hard. It has probably been over revved a few times. And for all those that ask about a rev limiter, remember rev limiter only protects on the way up, not on the way down. So if you miss a shift, it will zing to 10k plus RPM.
Q: What causes RB26 oil pump failure?
A: The stock RB26 oil pump drive on the crankshaft is too short and can cause slippage at high RPMs.
Q: How do I prevent RB26 oil pump issues?
A: Install a crank collar, use upgraded pumps, and monitor oil pressure regularly.
This is the type of thing that I want to see 3D printers used for, rather than another cupholder. These Carbon Fiber Polycarbonate blend MAF delete pipes are an easy way to get rid of the mass air flow meters, on cars with a stand alone ECU. You could probably even use them to run an R35/Nissan MAF if you cut them, and bonded the MAF holder in. The price is great, and you should support the small guys if you can. You can email John here.
Again, if you just remove your MAF from a stock car, it will not run.
Stockish RB26 with N1 turbos, Tomei cast exhaust manifolds, HPI 76 mm outlet pipes.
Looking to boost the performance of your Nissan Skyline GT-R? Understanding the stock and aftermarket turbo options is crucial. This guide provides information on turbo upgrades for the iconic R32, R33, R34, and R35 GT-R models.
Mines MB7 engine with twin turbos
Stock RB26DETT Turbo Limitations (R32, R33, R34):
The legendary RB26DETT engine, found in the R32, R33, and R34 GT-Rs, came equipped with twin ceramic turbos. While capable of impressive performance, these stock turbos have limitations:
Ceramic Exhaust Wheel Failure:
Running boost levels above 1.1 bar (approximately 16 psi) significantly increases the risk of the ceramic exhaust wheel breaking off. This can lead to catastrophic engine damage.
Stock Boost Levels:
The stock peak boost levels for these models are:
R32 GT-R: Approximately 0.8 bar (11.5 psi)
R33 GT-R: Approximately 0.9 bar (13 psi)
R34 GT-R: Approximately 1.0 bar (14.5 psi)
Performance Potential:
While pushing the limits, some enthusiasts have achieved low 12-second and high 11-second quarter-mile times on stock turbos. However, this is not recommended for long-term reliability.
Product: RB26DETT Engine Parts - R1 Turbo Kit Part Num: 1441A-RSR45
SPECIFICATIONS: Compressor: - Housing: T3 (A/R 0.42) - Wheel: T3 (trim 55) Bearing: Ball bearing Turbine: - Housing: T25 (A/R 0.64) - Wheel : GT25 (trim 62) Actuator: Reinforced spring, adjustable rod Max. efficiency: 73% Max. air pressure ratio (at boost pressure): 103% (1.35kg/cm2) Designed output: 280PS(2)
PRODUCT NOTES: - For Skyline GT-R (BNR34) vehicles for N1 racing- Reinforced actuator set included (nozzle opening pressure: 635mm Hg/0.33mm, 760mm Hg/4.0mm)- One vehicle set (two turbo units)/exchange gaskets/necessary piping - Use of this product requires adjustment of boost pressure and engine control unit before use.
A Billet Compressor Wheel compared to a Cast Compressor Wheel offers NO GAIN in performance by its material alone. Some have argued that they can be made lighter for better spool, or that they can be made with more aggressive fin designed due to there better sheer strength. While that MIGHT be true, we have seen no conclusive evidence or study that has proven this so we have to rule it out for now and say it’s NOT FACTUAL even though it MIGHT be true.
Billet wheels CAN, again that is CAN, perform better. Because they can be a low production run of wheels, there flow and performance can be tailored to running a specific pressure ratio (PR) or to have a certain amount of peak flow, or surge line capability, or be able to jump on new blade design technology faster since there is no need to delay the technology getting to market because of setting up machining and tooling.
2024 Turbo chart. Inducer and Exducer sizes in mm. lb/min in airflow
As a general rule, a turbocharged gasoline engine can produce approximately 9.5 to 10.5 horsepower (at the flywheel) for every pound per minute (lb/min) of airflow. Therefore, to estimate the horsepower output based on airflow, you can multiply the airflow in lb/min by this range (9.5-10.5). For example, if your turbocharger flows 40 lb/min, you can expect to produce around 380 to 420 horsepower.
Inserting type inside diameter φ 73, major diameter φ 90.5
25
High silicon
-
-
-
AX75F92
STD
Floating metal
West gate
730
50
65
92
φ 100
φ 60
17.8
89
74.1
70
T4 and 1 port
Inserting type inside diameter φ 73, major diameter φ 90.5
25
High silicon
-
-
-
* As for the AX53B series turbine specification differs each every kit.
The RX6B series has set conformity turbine size each every kit.
Each commodity concerning details please inquire.
The following charts below are in no means scientific. They are done on different days, different cars, different setups. What we are looking at is overall ideas.
Many different turbos. Points picked from dyno charts and plotted
Same chart broken out to several old single turbo setups.
R35 GT-R
Standard
Spec V
HKS-TF
COMP
Trim
60T
60T
64T
IN（mm）
43.4
46.5
46.5
OUT（mm）
56
60
60
Number of blades
12
12
12
EXH
Trim
57T
82T
57T
IN（mm）
53
53
53
OUT（mm）
39.8
48
39.8
Number of blades
9
11
9 + cutback
edit-I am not sure this is the standard GT-R turbo, it specs out more like the SpecV turbocharger
Uses an IHI turbo, with an integrated exhaust manifold.
IHI RHF55 same as MY06 STi Impreza
Turbocharger Type RHF55 Turbine Blade no. 11 Compressor Blade no. 6 + 6 Turbine Rotor Size 53mm / 48mm Compressor Rotor Size 60mm / 46.5mm Max. Turbine Speed 165000 rpm Wastegate Open Press. 78 kPa A/R Ratio 15 Compressor seal material Synthetic mica + Teflon Bearing Type Floating Metal Bearing
Buy USA Legal R32, R33, and R34 Skylines at Toprank Importers! When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network
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