V6 Aurelia Mania

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discovering the B-110‟s carburetors being too wide with their large float chambers needing more space on the block related to each pair of cylinders causing them to shift up to 35mm towards the right front, only solved with (already discussed above) more unwanted swirly intake ducts. Earlier with the Willy Claes B-20 Liege-Rome-Liege (above a replica) works 3C rally car setup, Lancia managed to eliminate most carburetor shifting by arranging the three twin choke 32 PA11 Solex narrow body carburetors oblique to compensate partly for the 40mm difference between opposing big ends. According to Nigel Trow, being familiar with the car, the 3C setup was very drivable and gave great satisfaction. Only long crossed intake canals with D-50 like tilted (right) carburetors, would have been ideal to suit the B- 54 maximally, but would be less advantageous for the B- 110 lacking enough space between the inner DOHC cam banks. All together the automotive industry was very much in need of narrow carburetors, quite possible at the thought of these D-50 carbs also being specially produced to Lancia specification. Notice D-50 intake canals being perfectly straight also thanks to hair pin type valve springs allowing intake canals passing tighter. Later conversion to coil springs consequently needed more curving around the valve guide bosses and indeed today intake ducts are more axial adapted to the valve stems. After all such reasoning one can question Lancia‟s ‟53 technical competition level being sufficient at all or did the “Reparto Corse” ran out of development potentials to properly engage the AR, Mercedes, Maserati, or Ferrari competition at the highest level or was the racing department just following the easy way? Did Vittorio Jano ran out of options and what had been the cause of the controversial family drama causing FdV‟s “promotion” to the Diesel department particularly in relation to the developing D-50 design. Remarkable in EZM‟s own data table (right) about B-110 up to D-100 characteristics, you will notice mostly the same crank/rod relations are applied. Obviously the strong Jano influences were still spooking around in the Reparto Corse offices.
EZM slowly tended to under square bore/stroke engines, but for the D-50A surprisingly 6,55mm longer conrods were tried. For the D- 100 design (left) the old still relatively long 135mm conrods returned unmotivated, meaning nothing new was introduced and so what should have been its testing all about. Mechanically and historically reasoning about longer or shorter conrods, the simplifying of the 1876 (above) four stroke Otto patented engine by Maybach and Daimler had certainly been all important to the developing automotive industry. The flat steam engine type Otto piston was connected to a two peace articulated driving system with a steam era typical sliding joint in between, formerly enabling double action push/pull steam pistons. The piston together with its fixed push/pull rod and sliding joint got brilliantly transformed into one internal jointed piston to articulate directly with its crank‟s conrod. Actually the gudgeon pinned piston was invented but at the time “Deutz Motoren AG” only could cope with such transverse vectors coming from small ends by using very long and consequently extremely heavy dimensioned driving connecting rods. Obviously longer conrods (left) (rod/rad 13.5:1) produce lower transverse forces resulting in lower piston resistance to the cylinder. By this improvement on Otto‟s stationary four stroke patent, Daimler and foremost Maybach managed to make the internal combustion engine successful to the automotive and aircraft industry. Avoiding such long rpm restrictive rods were tried in the Borsig GmbH design (below) resulting in a much faster and very much smoother running streamliner with short conrods and V arranged small Ø 300mm cylinders.
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Page 5 and 6: external low pressure waist oil con
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Page 13 and 14: Enlarging valves as an option to im
Page 15 and 16: Morini even developed their very su
Page 17 and 18: If I can do such design on the corn
Page 19 and 20: Zuffenhausen” solution (below) sh
Page 21: Francosporto‟s Related Links : Au

V6 Aurelia Mania

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