Friday 20 November 2015

Nissan GT-R VR38DETT Engine

The Scale Engine

This is an absolutely beautiful scale model of the power plant that makes the Nissan R35 GT-R one of THE fastest production cars in the world.


CLICK ON ANY PICTURE TO VIEW ENLARGED VIEW  

This blog is my build diary of this model provided by Eaglemoss Publications.

"During the build I will add the function of the parts where appropriate."
1. The engine block, may not look it but it is quite heavy and is made of cast aluminium.







2. The crank shaft, this is made up of many parts that are screwed together an is by far the most critical part of this build, you need to take your time to ensure all the parts are correctly aligned and tightly screwed together. If even one part is slightly out or catching on the pistons (next stage) the crank shaft will not turn.



3. This is the engine block complete with 6 pistons and the crank shaft in place, if everything is together correctly this should turn freely by hand. The conrods are alumilium and the piston heads are plastic, the parts are all grouped into numbers and this is how I put them together.





4. The Crank Girdle helps to stabilise the crankshaft and connecting rods while they are rotating, once this if fitted the crank should still rotate freely.

5. The Oil Pan forms the lower enclosure of the engine and collects the return oil, removing impurities and cooling it before returning it to the engine via an oil pump.

6. The intricately machined Cylinder Head on the GT-R houses the camshafts and closes in the top of the cylinders, forming the combustion chamber.


7. The Inlet Valves control the fuel air mixture to the engine, while the Exhaust Valves allow burned gases from the cylinders to be discharged. (Be careful at this stage as the springs are slightly conical, make sure they slip easily on the valve or they wont move freely).


8. The Camshafts rotate, opening and closing the intake and exhaust valves to allow the proper air / fuel mixture into the cylinders, while also allowing the burned air/fuel mixture out. Make sure when building this model follow this golden rule "if it moves grease it".


9. The Timing Chain Case helps to protect the timing and camshaft
chains from dirt and debris.







10. The Rocker Covers keep the oil in, and the dirt out, of the Cylinder Heads.

 11.  The turbocharger compresses air flowing into the engine, allowing more air into each cylinder. More air means more fuel can be added, creating more power from each explosion in each cylinder. Some if the parts in this issue are quite delicate so be careful not to over tighten the screws.
 

12.  The front differential splits power from the engine between the left and right front wheels.



13.  The Flywheel is mounted on the rear end of the crankshaft and helps to keep the engine running smoothly when the car is in neutral. Once you have fitted this part you will find that you can use it to freely rotate the crank shaft and really see the engine you have build. Myself I found this one of the most exciting parts to the build.



14.  The Nissan GT-R engine uses IHI RHF55 turbochargers that deliver instant power and almost no turbo lag. This helps the powerhouse produce 480 - 530BHP.
15.  When the GT-R accelerates the exhaust-side turbine is spun by the exhaust gases, which in turn spins up the intake-side turbine, pushing more air into the engine and creating more power.

16.  The GT-R has one Air Filter fitted per bank of cylinders and these help to keep the engine clean and free of debris.
17.  The cast aluminium Intake Manifold on the GT-R allows for large volumes of air to get evenly distributed to the cylinders.
18. The Intake Manifold Collector is a series of tubes that evenly distribute air to optimise the efficiency and performance of the engine.
19.  The GT-R uses metal timing chains, which are hard wearing and require less maintenance than rubber timing chains.

20. The various Guide Plates help to keep the timing chain in place and ensure its smooth running. Be gentle when handling these chains on the model as they are quite delicate when flexed.



21.  The Front Timing Chain Case helps to prevent dirt and debris from getting into the timing chains and damaging them.
22. The final stage is to fit the display stand and electronics to make the engine noise.





 
Thats the engine completed. I have only shown the main stages of the build but as for level of detail it is second to non with parts fitted that can't be seen (spark plugs for example).  I hope you have enjoyed this blog and I look forward to any feedback.

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