S.E.F.A.C.
le Société dÉtudes et de Fabrication d'Automobiles de Course




SEFAC

S.E.F.A.C.

Grand Prix 750 kg / 3 Litre
Design:Émile Petit
Engines:24A, 2 * 4cyl in line 70 * 90 mm = 2771cc, supercharger 250 bhp (1)
24B (Dec 1935), 2 * 4cyl in line 72.5 * 90 mm = 2960cc supercharger 250 bhp? (1)
24B (1938-39), 2 * 4cyl in line 72.55 * 90 mm = 2976cc ? supercharger 250 bhp? (1)
Transmission:Cotal electromagnetic gearbox / Wilson automatic ?
Chassis:channel-section
Suspension:front: Forward facing links, coil springs
rear: Live axle, coil springs
Dimensions:wheelbase: 274.0 cm, track: , weight: 931 kg
Year:1935-1939 1 car built


Chassis was designed by Edmond Vareille, although the bulk of the design work was done by Emile Petit. The front suspension consisted of forward facing links and coil springs. In the rear the car had a live axle with coil springs. Transmission consisted of a Cotal electromagnetic gearbox. The 2771cc 8 cylinder engine was of an interesting design. It consisted of 2 four cylinder blocks side by side, each with its own crankshaft on a common crankcase running in opposite directions. The units had double overhead cams and a single huge supercharger for both blocks. However it only produced 250 bhp, the lowest value for any car in the 750 kg class. Wheels were 19". The order price for a SEFAC, if someone had wanted one, had been set to 225 000 francs.

(1) A copy of an original sales booklet dated December 1935, quoting the E.P. type 24B. engine as 72.5 X 90. 2.960cc. IT is possible that the engine of 1934/5 was 2.771cc (type 24A). Information kindly supplied by Richard Line
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SEFAC SEFAC SEFAC
SEFAC SEFAC
Images courtesy of Richard Line




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© 2017 Leif Snellman - Last updated: 24.04.2017