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SPF GT40 Specifications

GT40 continuation collectible is licensed and endorsed by Safir GT40 Spares LLC, as a true "continuation" of the original. Each hand crafted GT40 carries the GT40 -P chassis number and is registry eligible. The versions that are currently offered are the MK1 or MK11 "A" and "B" body styles, available in right or left hand drive, and have a curb weight of 2400 lbs.

The chassis is an exact replication of the original monococque unibody structure down to the press steel roof spider. The only departure is the use of electro-galvanized sheet steel in the construction. The chassis, at over 12,000 pounds per degree is stiffer than any other chassis on the market, and is made up of over 244 laser cut and bent or pressed parts.

The suspension features the original race car lay out. So original are the GT40 continuation models that two thirds or the parts are interchangeable with an original.

The GT40 continuation accurately replicates the original chassis, suspension, wheel hubs, uprights, pedal box, instruments, steering, dash, "bundle of snakes" headers, catches and latches to name a but a few.

Automobile owners also have the luxury of modern safety modifications such Wilwood super light brakes, Bilstein shocks with H& R springs, an adjustable pedal box, cross flow radiator. Air conditioning which has been added with the compressor unit cleverly disguised in a mock up dry sump placed in the original position.

A center shifter is standard but the continuation GT40 may be ordered with an original style sill shifter available for right hand drive models. IF you have a left hand drive continuation GT40 you may want to opt for a modified sill shifter which is cable driven.

The Continuation GT40 is 163 inches long, 40 inches high with a ground clearance of 4". The GT40 continuation is 70 inches wide. The track front and rear are both 57 inches with a 95 inch wheelbase. The GT40 continuation has dual "Monza" style gas fillers and a 22.5 gallon fuel tank.

The interior features original style seats and racing 4 point harness seat belts. The GT40 continuation will comfortably fit a 95 percentile driver (6'2" X 240 lbs) by removing the seat "trampoline" support. A Racing style dash features Smith Gauges. The GT40 continuation has Rack and Pinion steering and has been fitted with a removable steering wheel for easy access to the cockpit.

We offer the following wheel options on the MKI: The standard MK1 BRM style rims are 10" wide in the rear. Available on special order are the MKI BRM style 8" rims or the wide body 13" rims. The spare wheel access cover can be ordered in a single or dual opening type.

The GT40 continuation leaves the factory as complete rolling chassis, complete in every way except for the engine, clutch, and transaxle.

The recommended power source is a specially prepared Roush engine with the new RBT/ZF style 5-speed transaxle but owners also have the option to fit a Ford-based 289, 302, or 351W small block or 427 big block (MKII only) engine.

*Our GT-40 chassis uses ZE 50/50 a Zinc coated mildsteel steel(Electro Galvanized Steel) this ensures that our Chassis stand the test of time against rust and other harmful pollutants.

Continue (GT40 History)

    1966 Ford GT 40 Mk IIA
Le Mans Winner
  Weight, lb   2682   2400 
  Weight Distribution
front/rear, %
  38/62   40/60
  Wheelbase in.   95.0   95.0
  Track front/rear, in.   57/56   56/59
  Overall length, in.   163.0   163.0
  Overall width, in.
(over scoops)
  70.0   70.5
  Height, in.   40.5   39.5 - 40.5
  Frontal area, sq. ft.   15.8   15.8
  Fuel tank capacity, gal.   42   22.5
  ENGINE SPECS        
  Family   Ford FE   Ford 351W
  N. cyl. & type   V8   V8
  Bore x stroke, in.   4.232 x 3.784   4.125 x 4.000
  Displacement, cu. in.   427   427
  Compression ratio   10.5   10.25
  Bhp @ rpm   485 @ 6200   550 @ 5600
  Torque @ rpm, lb. ft.   475 @ 4000   535 @ 5200
  Carburation   1 x 4 bbl   1 x 4 bbl, or EFI
  DRIVE TRAIN        
  Transaxle   Ford T-44   RBT
  Speeds   4   5
  Gear ratios,
  1st   2.22 / 6/18   2.58 / 9.73
  2nd   1.43 / 3.96   1.61 / 6.07
  3rd   1.19 / 3.30   1.14 / 4.30
  4th   1.00 / 2.77   0.846 / 3.19
  5th       0.642 / 2.42
  Differential ratio   3.09   3.77
  Transfer gear ratio   0.899    
  Frontal area   14.1 sq ft   14.1 sq ft
  Drag coefficient (Cd)   0.39   0.39
  Drag area (Cd*A)   5.50   5.50
  Frame type   Semi-monocoque,
sheet steel
sheet steel
  Brake type   Vented disc, single caliper   Vented disc, single caliper
  TIRES   Goodyear "A"   Yokohama Avid
  Front tires   9.75 - 15
(250 / 60-15 approx)
  225 / 60R15 (test)
225 / 50R15 (opt)
  Rear tires   12.8 - 15
(325 / 60-15 approx)
  275 / 60R15 (test)
295 / 50R15 (opt)
  Front wheels       15 x 8
  Rear Wheels       15 x 10
  Steering type   Rack and pinion   Rack and pinion
  Front suspension   Independent with unequal length A-arms, coil springs, tube shocks, anti-roll bar   Independent with unequal length A-arms, coil springs, tube shocks, anti-roll bar
  Rear suspension   Independent with trailing arms, unequal length lateral arms, coil springs, tube shocks, anti-roll bar   Independent with trailing arms, unequal length lateral arms, coil springs, tube shocks, anti-roll bar
  Instruments   7000 rpm tach oil temperature water temperature fuel pressure ammeter gearbox oil temperature   oil pressure 8000 rpm tach water temperature oil temperature fuel level ammeter 200 mph speedometer
  Warning lights   differential oil pressure engine oil pressure   high beam alternator turn signal radiator cooling fans
  Engine rpm @ 60mph   1905   1811
  LB / hp (with driver)   5.8   4.6
mph @ rpm
  1st   89 @ 6200   53 @ 6400
  2nd   140 @ 6200   85 @ 6400
  3rd   170 @ 6200   120 @ 6400
  4th   205 @ 6200   161  @ 6400
  5th       207 @ 6400
  Time to speed        
  0-40 mph, sec.   2.8   2.1
  0-60 mph, sec.   4.2   3.7
  0-80 mph, sec.   5.6   4.8
  0-100 mph, sec.   8.2   6.9
  0-120 mph, sec.   10.8   9.2
  0-140 mph, sec.   14.0   11.8
  0-160 mph, sec.   19.1   15.3
  0-180 mph, sec.   27.0   21.7
  Time to distance        
  Quarter mile, sec. @ mph.   12.0 @ 129   11.2 @ 135
Steady state mpg in top gear
  70 mph   16.5   16.0
  100 mph   15.7   15.1
  150 mph   10.1   9.62
  200 mph   6.2   5.9


1. Data for 1966 Ford GT40 from: Road & Track, Oct 1966, Portrait of the Le Mans Winner, Technical Analysis.
2. Data for Superformance GT40 Mk II from: Dimensions measured from GT 001 Weights from factory
    data for GT 002. Production drive train ratios from factory data engine specs from Roush data.
3. Superformance GT40's correct height depends on tire size and settings.
4. Superformance GT40 is lighter, primarily because of a lighter engine.
5. Difference in tread measurement is due primarily to differences in tire sizes.
6. Acceleration and fuel economy data from performance simulator.
7. Ford GT40 initial acceleration hampered by tall first gear.

Continue (GT40 History)