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This is the Story of the Mighty Mouse, by owner Ian Medcalf.
Built by Peter Day in 1978 for circuit racing in the 850cc Special Saloon Class.
Peter built the car specifically around its unique Gordon Allen 850cc 2 cylinder ½ BDA engine. The engine required very short exhausts to produce its impressive 115 BHP and 112 lb/ft torque and the rear-engined Fiat 500 provided the ideal home!
Peter had considerable success with the car before moving on to compete in the MG Metro Challenge.
The 500 was sold and went to Scotland to be raced and the BDA was replaced with a rather more conventional BMC ‘A’ Series engine.
I found the car in Chorley, Lancs. in 1987 looking rather sorry for itself in a back yard, under a sheet, covered in snow and paid £500 for the ‘engineless’ remains!
Then began the extended rebuild/restoration which took me 16 years! It returned to competition in Hill Climbing and Sprinting in September 2003.
The car competes in the Sports Libre class up to 2 litres against cars such as Radicals where wins for this little 1380 cc car are hard to come by!
Despite the odds, notable successes include a class win at the Barbon Hill Climb and Fastest Time of the Day at Scammonden Hill Climb. The Mighty Mouse has also taken the Best Prepared car awards at Barbon, Three Sisters and Curborough.
Ian Medcalf – Owner/Driver
Chassis Tubular Space Frame
Body Fibre Glass
Independent front and rear, Twin unequal length wishbones, Leda coil over shock absorbers
Front: 265mm diameter solid discs and four piston callipers
Rear: 220mm diameter solid discs and two piston callipers
3 piece split rim Compomotive - Front 6 x 13; Rear 8 x 13
Avon A15 Front 6.2/20-13 Rear 8.2/20-13
Swiftune 1380cc A Series
DC5/2 crankshaft, pistons and connecting rods
Simplex timing chain
SW23 cam shaft
5 port cylinder head to Rally/Sprint spec - 36mm inlet and 30mm exhaust valves
Forged 1.5:1 ratio rockers
Feather light fly wheel and back plate
Grey diaphragm and sintered race clutch plate
Swiftshift straight cut dog box
Straight cut 1:1.087 drop gears
4.7:1 straight cut crown wheel and pinion
Tran X limited slip differential
Webber 45 DCOE
141 BHP @ 7,500 rpm
108 lb/ft @ 6,000 rpm
Top speed 93 mph
0-60 – Don’t know but under 4 seconds!!
The Motorsport Festival for the Whole Family
26th - 28th June 2020
Advanced Booking Only