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Crossflow


This head was originally fitted to an all steel race X-flow engine that produced 168bhp.
Titanium retainers, titanium collets,Kent VS5 Springs, suit Kent Cams BCF3 or 234, steel spring bases and shims!


Properly gas-flowed to suit valves, not an off the self job!!

Doweled inlet manifold face (for perfect alignment)

41.2mm inlets, 34.8mm exhausts

9/32” valve stems, MAE bronze valve stem guides

My old 1700 Burton Crossflow..

Lightened (14lb) flywheel

Lightened (14lb) flywheel

Crossflow head: 1.62 in 1.375 ex

Veiw of some nice porting

Crossflow high pressure oil pump

Crossflow rocker gear/shaft

Crossflow standard timing gear/chain

1760 crossflow

Steel main caps, Lightened and balanced rods, Duplex timing gear, roller rockers, double valve springs, remaped distributer, High capacity oil pump

Cross-section through a crossflow head, inlet.

Cross-section through a crossflow head, exhaust.

Down draughted 105E head. (Pre Crossflow radical port redesign)

Use Cossie big end bolts for added strength.

Alfa piston?

Modified timing chain cover.

Camshaft Guide
Inserting a 6.25mm spacer under the pressure relief valve on a standard crossflow oil pump gives you an extra 15psi of oil pressure...
"How to" Tune small ford engines

The following was generated on a dyno simulation program

Whilst the exact figures may vary the relationship between various components should remain the same.

Standard 1600cc Kent crossflow

Standard 1600cc Kent crossflow with 11.0:1 compression ratio

Standard 1600cc Kent crossflow with twin side draft carbs

Standard 1600cc Kent crossflow with Extractors and big bore exhaust

Standard 1600cc Kent crossflow with big valves and gas flowed head

Standard 1600cc Kent crossflow with BCF2 Camshaft

Standard 1600cc Kent crossflow with all the above

 
RPM Horsepower   Torque
2000 0 0 0 10 0 16 28   0 0 0 25 0 41 74
2500 5 7 8 18 4 24 39   10 14 16 38 9 50 82
3000 17 20 22 26 17 35 50   30 35 38 45 29 61 88
3500 27 30 34 36 26 47 67   40 45 50 54 39 70 100
4000 36 40 44 50 35 59 88   47 53 58 66 47 78 116
4500 47 52 56 66 47 72 107   55 61 66 77 55 84 125
5000 57 63 63 80 59 83 122   60 66 67 84 62 87 128
5500 65 73 68 92 69 93 133   62 69 65 88 66 89 127
6000 71 80 69 100 76 98 139   62 70 61 88 67 86 122
6500 71 81 65 105 79 98 141   57 66 53 85 64 79 114
7000 66 77 58 104 75 94 141   49 58 44 78 56 70 106
7500 60 73 52 102 72 88 141   42 51 36 71 50 62 99
8000 51 63 41 93 64 79 135   33 42 27 61 42 52 88
Crossflow (1600) Engine Replacement Part Numbers
Note: Part numbers should fit engines with a 711M block (1971 to 1981). Most parts will also fit earlier blocks and very early engines with the chambered head but check first!
This is a reference for all those hard to find replacement part numbers. Mostly they relate to the standard items but sometimes a "performance" part has also been listed if it is a common replacement. If you have any additions or corrections please email Tim Hurst at timhurst@beer.com and let him know.
 
Spark Plugs
Bosch W6DC (Use R if ballast resistor fitted)
NGK BP7E (Use R if ballast resistor fitted)
Autolite AG22 (Not sure if still available)
Champion N7YC (Use R if ballast resistor fitted)
Oil filter
Ryco Z62
Valvoline V032
Contact set (Motorcraft/FoMoCo Distributor)
Bosch GF82V
Echlin ???
Contact set (Lucas Distributor)
??? ???
Contact set (Bosch Distributor)
??? ???
Condenser (Motorcraft/FoMoCo Distributor)
Bosch GA61
Condenser (Lucas Distributor)
??? ???
Condenser (Bosch Distributor)
??? ???
Distributor Cap (Motorcraft/FoMoCo Distributor)
Bosch GA192
Distributor Cap (Lucas Distributor)
??? ???
Distributor Cap (Bosch Distributor)
??? ???
Rotor Arm (Motorcraft/FoMoCo Distributor)
Bosch GA77
Rotor Arm (Lucas Distributor)
??? ???
Rotor Arm (Bosch Distributor)
??? ???
Auto Pan Gasket Set
ACL KV157
Cylinder Head Gasket
AA Gaskets AH750
ACL AH750(MT/EZ)
Conversion Gasket Set
ACL EH763
Engine Supplementary Set
ACL HL336
Extractor Gasket
ACL HSM20
Fuel Pump Gasket
ACL KR006
Full Gasket Set
ACL FH754MT
Head Gasket Set
AA Gaskets CH750HS
ACL HS750MT
Manifold Gasket Set
ACL JA503(EZ)
Oil Pan (Sump) Set
ACL HC060(EZ)
Thermostat Gasket
ACL KS290
Timing Cover Gasket
ACL TC37
Valve (Rocker) Cover Gasket
ACL JM478(EZ)
Valve Grind Set
AA Gaskets CH750
ACL CH750(MT/EZ)
Water Pump to Block Gasket
ACL KA114
Camshaft Bearing Set
ACL 3C3300
Conrod Bearing Set
ACL 4B1043
Main Bearing Set
ACL 5M2152
Piston Ring Set
ACL PS1540/C1540
Small End Bush
ACL RB902
Thrust Washer Set
ACL 1T2152

 

Changing Pistons to alter compression ratios
Imperial Engines          
Original Engine Valve cutouts Piston Volume Standard Engine Fitted to 1300 engine Fitted to 1600 engine
1100 LC 1.55in 31cc 8.0:1 9.0:1 11.3:1
1100 HC 1.55in 26cc 9.0:1 10.2:1 11.8:1
1300LC 1.55 38cc 8.0:1 8.0:1 9.5:1
1300 HC 1.55 38cc 9.0:1 9.0:1 10.3:1
1300 GT none 21.5cc 9.2:1 9.2:1 11.0:1
1600 & GT none 30.5cc 9.2:1 8.2:1 9.2:1
Metric Engines          
1100 LC 1.65in 31cc 8.0:1 9.0:1 11.3:1
1100 HC 1.65in 26cc 9.0:1 10.2:1 11.8:1
1300 LC 1.65in 38cc 8.0:1 8.0:1 9.5:1
1300 HC 1.65in 33cc 9.0:1 9.0:1 10.3:1
1300 GT 1.65in 33cc 9.0:1 9.0:1 10.3:1
1600 & GT 1.65in 37cc 9.0:1 8.0:1 9.0:1

 

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