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  • Users: PJGD
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  1. PJGD

    Detroit nozzle

    Try Delphi Diesel Aftermarket Remanufacturing at +1.800.521.4784
  2. PJGD

    Two-slider crank mechanism

    Take a look at the SAE papers by Jack Kentfield, for example paper 891866, where he goes into some detail of an over-center toggle linkage that provides extended expansion and all four strokes in a single crank rotation as well as potential VCR facility. It is a somewhat simpler mechanism than...
  3. PJGD

    Scania does it right

    Recent truck engines are able to reach 50% BTE through a lot of attention to detail. There is no silver bullet, just many small incremental improvements to things like low friction bore coatings, thermal barrier coatings, low leakage injection systems, Miller/Atkinson valve timings...
  4. PJGD

    Predicting maintenance for vehicle engines

    Some modern engines use electronic control of oil pressure. By monitoring actual oil pressure against input signal to the pressure control actuator while taking into account oil temperature, time since last oil change, engine speed, and other factors, it may be possible to establish a...
  5. PJGD

    Press-together crank vs a billet crank

    For a stronger, easier to machine, and much more compact crankshaft, consider the disc-web crankshaft where the webs are the main bearings. There have been both roller bearing versions and plain bearing versions of this style crank in the past. In the case of the plain bearing version shown...
  6. PJGD

    Looking for ideas on how to make a

    The Lucas system was widely used in F1 and other racing engines
  7. PJGD

    Cast iron-cast steel cyl. heads

    Heavy duty automotive diesels use compacted graphite iron [CGI], stronger than grey iron, hence thinner walls = lighter.
  8. PJGD

    An Achates Engine is Hitting the Road

    turbo motor: Actually I did; the Commer engine was designed at Humber in Coventry in the early 1950's, but manufactured by Tilling-Stevens in Maidstone, and typically ended up in Rootes-Commer trucks. Regrettably, I failed to mention my favorite OP engines: the Napier Deltic and the Doxford...
  9. PJGD

    An Achates Engine is Hitting the Road

    As did Tilling-Stevens, Leyland, Rolls-Royce, Coventry Climax, Fairbanks-Morse, and many others. . .
  10. PJGD

    12 Volt vs 24 Volt diesel engine

    No, I did mean 48 volts not 480 V. Take a look at the DOE Supertruck program and you will see them using 48V for the electric PAS, air compressor, and WHR.
  11. PJGD

    12 Volt vs 24 Volt diesel engine

    Wait until 48V becomes more common! Both car and commercial vehicle sectors are applying it particularly to hybrid powertrains and WHR [waste heat recovery] systems in CV's.
  12. PJGD

    1980s F1 Fuel, Toluene Diesel blend

    I don't know, but it seems quite likely that this strategy might have been used with the Lucas mechanical Petrol Injection system widely used on racing engines in the 1970's & 80's. The Lucas shuttle metering concept involved a steel rotor running at half engine speed in a steel sleeve and...
  13. PJGD

    diesel fuel injection nozzle

    What is the base engine nozzle part number etched into the body, e.g. BDLL150S1234 ?
  14. PJGD

    diesel fuel injection nozzle

    The Wikipedia article indicated that the Rakovica engines are likely closely based on Perkins engines, and the tractors in the Wiki photograph can be seen to have CAV DPA rotary pumps on them. Also, the engine displacement and power rating that the OP mentions aligns with the details of the...
  15. PJGD

    diesel fuel injection nozzle

    What is the engine that you want to modify. Knowing that may enable me to narrow down some nozzles that have a similar specification.
  16. PJGD

    V8, 2 stroke poppet valve Lexus 1UZ engine

    There are several SAE papers on this topic and configuration. It is worth reading up on the Ricardo "Flagship" concept in papers 900802 and 920778. There is a lot of information of scavenging of such an engine in 1999-01-1250.
  17. PJGD

    Some of the worse designed engines?

    So far, I am failing to see why the name Napier would appear in any thread supposedly about engines of the worst design. Impressive, certainly, but never worst. As for the Dynastar, these photos are not from the web, but there is plenty of information out there about it, but again the thread...
  18. PJGD

    Some of the worse designed engines?

    Any British motor cycle engine up to say 1970 That would certainly not be true in the case of Vincent HRD, and dubious in the case of Velocette and a few others.
  19. PJGD

    Some of the worse designed engines?

    In the case of Oldsmobile, they tried really hard to win this award but after a while it became apparent that although even more gutless than the V8, the V6 was somewhat more reliable (it blew head gaskets a little less frequently). So they had a third attempt and designed a 60° V5 engine...
  20. PJGD

    Mercedes 300 Gullwing - injection pump upgrade

    I think that with your plan, you are giving yourself a huge amount of unnecessary work and problems. Essentially the Bosch petrol injection (PI) pump is a relatively minor development of the diesel fuel pumps of that era, and the manufacturing tolerances are of a similar level of stringency...

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