Technical Data

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Technical Data Urraco   Espada   Jarama   Miura  
Total displacement 2462.9 cm3   3929 cm3 3929 cm3 3929 cm3
Cylinder diamerter 36 mm   82 mm. 82 mm. 82 mm.
Cylinders 1st oversize   82.2 mm. 82.2 mm. 82.2 mm.
Cylinders 2nd oversize   82.2 mm. 82.4 mm. 82.2 mm.
Min. clearance between cylinder and piston .075 mm   0.075 mm. 0.075 mm. 0.075 mm.
Max. clearance between cylinder and piston .105 mm   0.105 mm. 0.105 mm. 0.105 mm.
Crankshaft main bearing 62.979 mm   62.979 mm. 62.979 mm. 62.979 mm.
Crankshaft rod bearing 45.490 mm   43.604 mm. 43.604 mm. 43.604 mm.
Crankshaft main bearing 1st oversize 62.725 mm   62.725 mm. 62.725 mm. 62.725 mm.
Crankshaft conn. Rod 1st oversize 45.236 mm   43.354 mm. 43.354 mm. 43.354 mm.
Crankshaft main bearing 2nd oversize   62.471 mm. 62.471 mm. 62.471 mm.
Crankshaft rod bearing 2nd oversize   43.086 mm. 43.086 mm. 43.086 mm.
Min. clearance between bearing and crankshaft .026 mm   0.04 mm. 0.04 mm. 0.04 mm.
End float clearance .15 mm   0.015 mm. 0.015 mm. 0.015 mm.
clearance conn. Rod and crankshaft .05 mm   0.05 mm. 0.05 mm. 0.05 mm.
clearance between conn. Rod when fitted together .1 mm   0.1 mm. 0.1 mm. 0.1 mm.
clearance of intake guide valve .027 mm   0.035 mm. 0.035 mm. 0.035 mm.
clearance of exhaust guide valve .037 mm   0.055 mm. 0.055 mm. 0.055 mm.
adjustment clearance .4 mm   0.25 mm. 0.25 mm. 0.25 mm.
cylinder numeration front         Front   Front   Front  
  8 - 7    6 - 5   12        1   12        1   1  2  3 4  5  6 12    11   10 9  8  7
  4 - 3    2 - 1   11        2   11        2  
    10         3   10         3  
    9          4   9          4  
    8          5   8          5  
    7          6   7          6  
   
Firing Order 1 - 5 - 4  - 8      7 - 2 - 6 - 3   1-7-5-11-3-9      6-12-2-8-4-10   1-7-5-11-3-9      6-12-2-8-4-10   1-7-4-10-2-8     6-12-3-9-5-11  
Degree of intake valve before P.M.S. 26   32   32   32  
Degree of intake valve after P.M.I. 66   76   76   76  
Duration   288 degrees   288 degrees   288 degrees  
Degree of  exhaust before P.M.S. 62   64   64   64  
Degree of  exhaust after P.M.I. 18   32   32   32  
Duration   276 degrees   276 degrees   276 degrees  
Valve opening overlap   64 degrees   64 degrees   64 degrees  
ignition timing 18   18   18   18  
automatic ignition timing 30   20   20   20  
contact point gap 0.35/0.40 mm 0.35/0.40 mm. 0.35/0.40 mm. 0.35/0.40mm.  
cam angle 58/60   48/50   48/50   48/50  
spark plugs Bosch 235 P 21   Bosch 235 P 21   Bosch 235 P 21   Bosch 235 P 21  
spark plugs gap 0.35 mm 0.35   0.35   0.35  
   
Torque settings  
Main bearing stud 8mm 2.8 kgm 1.8 kgm 1.8 kgm 1.8 kgm
Main bearing stud 12mm 5.7 kgm 3.5 kgm 3.5 kgm 3.5 kgm
Cylinder head stud 3 kgm 3 kgm 3 kgm 3 kgm
Cylinder head nuts 7 kgm 8.6 kgm 8.6 kgm 8.6 kgm
Main bearing nuts 8mm 2.8 kgm 2.8 kgm 2.8 kgm 2.8 kgm
Main bearing nuts 12mm 5.7 kgm 9 kgm 9 kgm 9 kgm
Conn Rod bearing bolts 6 kgm 6 kgm 6 kgm 6 kgm
Crankshaft flywheel bolts 2.8 kgm 2.8 kgm 2.8 kgm 2.8 kgm
Clutch plate bolts 2.8 kgm 2.8 kgm 2.8 kgm 2.8 kgm
Camshaft support nuts 2.8 kgm 2.8 kgm 2.8 kgm 2.8 kgm
In & Ex manifold bolts 3 kgm 3 kgm 3 kgm 3 kgm
Front pulley bolts 28.7 kgm 3.5 kgm 3.5 kgm  
Crown&Carrier bolts 3.5 kgm 7 kgm 7 kgm 7 kgm
Out put shaft nut 14 kgm 14 kgm 14 kgm 14 kgm
Wheel nuts 13 kgm 13 kgm 13 kgm  
Wheel hub nuts 34 kgm 34 kgm 34 kgm  
lower swivel pin bolt 12 kgm 15 kgm 15 kgm  
Rear axle shaft flange nut. 25 kgm 25 kgm 25 kgm 15 kgm
   
Carburation:          
Choke 30 mm 30 mm 30 mm 32 mm
auxiliary Venturi 3 mm 4.5 mm 4.5 mm 4.5 mm
main jet 1.2 mm 1.2 mm 1.2 mm 1.3 mm
idling jet 0.6 mm F 9 / 0.45 mm F 9 / 0.45 mm 0.55 mm
pump jet 0.35 mm 0.35 mm 0.35 mm 0.5 mm
pump course   9 mm 9 mm   mm
starting jet F 50 / 0.80 mm F 5 / 0.60 mm F 5 / 0.60 mm   mm
emulsioning tubes F 7   F 3   F 3   F26  
air corrector jets 1.6 mm 2.1 mm 2.1 mm 1.8 mm
needle valve 1.75 mm 1.75 mm 1.75 mm 1.75 mm
carburettor exhaust valve 0.5 mm 0.75 mm 0.75 mm 0.5 mm
float 11.8 gr 26 gr 26 gr 25.5 gr
float level 10 mm 8.5 mm 8.5 mm 14 mm
 
Fluid Capacities  
water radiator 12lt   14lt   14lt   16lt  
fuel tank 80lt   93lt   100lt   77lt  
engine oil 7,5lt   14lt   14lt   12.6lt  
gearbox oil 3.5lt   3.5lt   3.5lt   split 9+3.6lt
differential oil   sump  
 
Sizes    
Length 4250mm   4738mm   4485mm   4390mm  
width 1760mm   1860mm   1820mm   1780mm  
Height 1115mm   1185mm   1190mm   1780mm  
Rack 2450mm   2650mm   2380mm   2504mm  
Track 1460mm   1460mm   1490mm   1412mm  
weight 110kg   1465kg   `460kg   1125kg  
   
Tyres    
Front pressure Kg./cm2 2.   Kg./cm2 2.4   Kg./cm2 2.4   Kg./cm2 2.5  
Rear pressure 2.5   2.6   2.6   2.7  
   
Wheel alignment  (front)    
toe-in 0mm   2mm   2mm   0mm  
Camber 57'   0   0   0  
Caster 7dg   2dg   2dg   2dg 45'  
King pin inclination 10dg 30'   7dg   7dg   7dg  
   
Wheel alignment  (rear)    
Toe in 3mm   3mm   3m   3mm  
Camber 1dg   .5dg   .5dg   .5dg  
   
Suspension Spring Pressure    
5103657- front - d. (coil diameter) 12mm  240kg@ 212mm     435kg@141mm      
5208666 rear d. 13.5mm 430kg@231.5mm    685kg@163mm      
5104627 frt  d. 13mm until car #575   565kg@204.5mm  806kg@162.5mm      
5108250 frt d.15mm from car #576 -1000   535kg@234mm   864kg@183mm      
5109898 frt 16mm from 1001 - end   600kg@234mm   900kg@195mm      
5205633 rear 13mm til car #575   581kg@228.5mm  890kg@177mm      
5208249 rear 15.5mm from 576 - end   610kg@249mm   1005kg@194mm      
5104627 frt 13mm til car 175     565kg@204.5mm  806kg@162.5mm    
5108250 frt 15mm from 176 - 240   535kg@234mm  864kg@183mm    
5109898  frt 16mm from 241 - end   600kg@234mm  900kg@195mm    
5205633 rear 13mm til car 175   581kg@228.5mm  890kg@177mm    
5209 649 rear 15.5mm from 176 - end   470kg@249mm  867kg@194mm    
5103721 frt 12mm all cars    
5203290 rear 13mm  til car 300    
5204894 rear 12mm from 301 - end    
     
Shock absorber Calibration    
Steering 59.5 kg @  8.5mm      
front suspension      
Compression 108.5kg @ 15.5mm 154kg @ 22mm 154kg @ 22mm 196kg @ 28mm
Extension 35kg @ 5 mm 66.5kg @9.5mm 66.5kg @9.5mm 38.5kg @ 5.5mm
Rear Suspension      
Compression 133kg @ 13mm 140kg @ 20mm 140kg @ 20mm 175kg @ 25mm
Extension 35kg @ 5mm 70kg @ 10mm 70kg @ 10mm 56kg @8mm  

Ever wonder?

If you own a Countach with the aluminum shields, ever wonder what is under it?.

Junk!

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