new article on the R18 engine on

Yesterday, a new article on the R18 engine appeared on – THE MONOTURBO. I cannot understand, why Audi didn’t send me this pictures before. 😉 If I have had this pictures earlier, I could have built the engine much more accurate.

Although I’ve found a mass of mistakes on my engine, I won’t make any big changes. Especially the front end of the engine is completely different to my one. But I took help there from the R15 engine that has the gear drive for the ancillaries at the front end. Now, with the new pictures, the drive gear of the R18 engine is doubtless at its rear end. But with the engine mounted in the car, this error can’t hardly be seen later. But certainly that rankles me much.

Also at the turbo charger I’ve found a new item between the turbine and the compressor which should be part of the turbines lubrication system and maybe also of the VTG. The turbo also is mounted in a big angle to the cars base plane (around 20 degrees). My one is mounted nearly parallel.

The fact, that this are pictures from the 2012 engine, explains a few other differences compared to my engine. Namely the different position of the air collectors, the routing of the common rail system feeding and returning lines and the heat shields of the exhaust manifolds.

The problem which I’ve described in the post Questions about the R18 oil system I just solved with help from a few e-mailers. Thanks for that! The cooling items, which I thought they were there for oil cooling, are diesel coolers. That was another condition that I did not expected. But the need for a fuel cooling is logical in fact that the diesel heats up enormously at the common rail pressure of about 2500bar (according to Wikipedia up to 140°C).

It’s doubtless too, that the oil tank is at the engines front end and the cutout in the monocoque is necessary. I’ll have few beer on this to decide what I’ll do there. 😉

But one question is still left. The one about the cooling of the oil system. A current chain of thought is, to cool the oil by the “used” air from the cockpit. That could be a possibility, although I think, there’s too less air for oil cooling.

Here are the new pictures of the Audi engine, which throw myself into trouble.

This picture shows me an element between the turbine (silver) and the compressor (black) which is, in my point of view, part of the lubrication system.

That picture almost killed me. The difference between the former Le Mans engines of Audi is enormous. Since the R8 (1999) over the R10 (2005) to the R15(2009), al cars have the gear drive for their ancillaries (water and oil pumps) at the front. The R18 engine has it at the rear.

Very nice view of the 2012 engine. It’s a real engineering masterpiece. Although the oil tank at the front loooks giganic, it has only a capacity of approximately 22 litres.

Picture source:



About paulsf1

My name is Paul Bischof. I’m a student in mechanical engineering at the Technical University of Graz in Austria, expected finishing in February 2016. Since I was eight years old, I am building model planes out of paperboard. Since 2004 I scratch (that means building without an assembling set) Formula 1 and sportscars in 1:10th scale. The average time I need for such a car is around 400 to 700 hours within 4 to 8 months. One car has around 3500 up to 5000 single components. On this blog, you can take a look on my work and later, after my studies, hopefully you can see me in Formula 1.

8 responses to “new article on the R18 engine on”

  1. vmmfanuk says :

    Reblogged this on pptf1car and commented:
    What beautiful engineering.


  2. robgt81 says :

    Lovely model! Is there any chance the oil is fuel cooled? Not sure if this is allowed in the rules. Between the turbine and compressor sections of the turbo you have the bearing housing and VG controller. The bearing housing will have the usual lubrication connections and may also have connections for turbo speed measuring. The VG controller will often be water or oil cooled. Does the carbon box on top contain electrical cables or do the connections take air from the big silver lagged pipe that runs on the left side of the engine?


    • paulsf1 says :

      Thanks! Fuel cooled oil? That would be a possibility (really good thought!) – the oil thank has a surface looks like a radiator. Yep, the carbon box on top contains electrical cables and connections to the silver air pipes.


      • robgt81 says :

        Fuel cooled oil coolers are very common on aircraft, the oil system pipework sometimes simply runs through the fuel tanks or you can use a heat exchanger system within the fuel tank. Fuel does a good job of cooling and this also assists in warming the fuel which improves atomisation.

        It will be interesting to have a look a closer look at the oil tank!

        I work in turbo charger devlopment and I am currently working on an article about the R18s turbo, ill drop you a copy when its ready if you like 🙂


    • paulsf1 says :

      I’d love to get a copy of your R18 article! In which company do you work in turbo charger development?


  3. robgt81 says :

    I work for Cummins Turbos, we do quite a lot of variable geometry stuff for diesel engines.


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