Technical
changes/ improvements:
- The wheels were rebuilt
to 16";
- Engine: All bearings were
changed by special racing
types with steel-backed shells and the mains were finished with
special racing metal;
Big end shells were also finished with special racing metal;
Compression ratio was increased to 7:1;
Cam roller and followers were changed by ones with a larger
diameter;
The flywheel was lightened and thee whole engine balanced;
Heavier clutch springs were fitted;
Two low pressure Arnott superchargers were fitted as were two oversized
Arnott carburettors;
Twin double SU petrol pumps were fitted;
Swept inlet manifold was fitted;
Derrington swept exhaust was fitted with servais box;
Two Kenlowe electric fans were fitted;
Special finned oil cooler was fitted;
- Gearbox was replaced with
an overdrive gearbox fitted with special heavy selector springs to
hold the gears in place during hill-climbs;
- Brakes and servo relined
with Mintex linings;
- Springing was adjusted
because of the lighter weight;
Anti tramp-bars fitted to the live rear axle with additional
dampers.
Technical
data
Six cylinder OHV engine
cylinder capacity: 4257 cc.
Twin Arnott blowers, twin Arnott carburettors, twin double SU fuel pumps
capacity: approx. 270 bhp.
top-speed: approx. 140 mph. - approx. 220 km/h.
Wins
& successes (selection)
Derby Crewe Trophy (three
years running)
Tim Birkin trophy
Keston Pelmore Trophy
Christopher Tomkinson Trophy
Brighton Speed Trials (Fastest Bentley)
Firle Hill Climb (Fastest Bentley)
Brighton 1967 (fastest lap, Turner driving)
Silverstone 1970 (fastest lap, Turner driving).
Information
sources
The information above is
largely taken from the book "Bentley Specials & Special
Bentleys" written by Ray Robberts.
Some information is shortened or less specific than the original, other
information is added by the cars owner, Altena and by ClassicarImages.
Everyone who has additional historic information on this car please feel
free
to contact us .
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