Fordnatics List Archive

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Mail From: (email redacted) (Dave Williams)


. The Ford Small Block Head FYI, version 94.08.21
. created and maintained by: (email redacted)

Corrections and submissions are welcome. Please send them via email
to (email redacted), CompuServe 72571,3542 or PO Box 181,
Jacksonville AR 72078-0181 USA.

The Head FYI is also available via FTP on ftp.rahul.net (userid
"anonymous", password your email address), as

. /pub/chucko/fordhead or
. /pub/chucko/fordhead.gz

This is a compendium of the information I have available on Ford small
block cylinder heads.

.Remember: though the air flow figures are very nice to have, they are
. not directly comparable between different tests! We're lucky
. to get the pressure drop used, much less the air density etc.
. Use these numbers only as a rough guide.

Warning! If you decide to buy bare heads, some heads don't take
standard,
. easily available valves! In fact replacement valves may be
hard
. to get, period. Also, some heads take Chevy springs, not
Ford.


=====================================================================
head mfr, model | Ford Motorsport GT-40 cast iron (L302)
head type | Windsor
material | cast iron
chamber size | 65.6cc (when used with Motorsport valves)

intake valve | 1.84 standard valve? |
exhaust valve | 1.54 standard valve? |

intake valve seat |
exhaust valve seat | "hardened"

intake valve length |
exhaust valve length|

intake port volume |
exhaust port volume |

valve material |
valve guides |
flow |
chamber shape |
spring size |
studs | screw in

exhaust bolt pattern|
exhaust port shape |

weight |
approx price bare | $359.95 each, suggested retail
approx price comp. | $585.95 each, suggested retail
part number bare | M-6049-L302
part number comp. | M-6049-L303
CARB approval | yes, EP D-308
comments |

unattributed data | Hot Rod, Ford Cylinder Head Guide, Sep 94

=====================================================================

head mfr, model | Ford Motorsport GT-40 aluminum (Y302)
head type | Windsor
material | aluminum
chamber size | 64cc

intake valve | 1.94 standard valve? |
exhaust valve | 1.54 standard valve? |

intake valve seat | insert
exhaust valve seat | insert

intake valve length |
exhaust valve length|

intake port volume |
exhaust port volume |

valve material | stainless steel
valve guides | insert
flow |
chamber shape | bean or "D", no quench on plug side
spring size | dual springs on complete head
studs | screw in

exhaust bolt pattern| standard
exhaust port shape | square

weight |
approx price bare |
approx price comp. |
part number bare | M-6049-Y302
part number comp. | M-6049-Y303
CARB approval |
comments | supposed to have thick wall ports and deck to
allow
. | radical porting and milling, no heat crossover, no
. | valve/piston interference when using any (early
'94)
. | SVO camshaft

unattributed data | Hot Rod, Ford Cylinder Head Guide, Sep 94

=====================================================================

head mfr, model | Ford Motorsport E351
head type | Windsor
material | cast iron
chamber size | 64cc

intake valve | 2.02
exhaust valve | 1.60

intake valve seat | none, cut into iron head
exhaust valve seat | inserted seat

intake valve length |
exhaust valve length|

intake port volume | 190cc
exhaust port volume |

valve material |
valve guides |
flow |
chamber shape | bean or "D", slight quench on plug side
spring size |
studs | screw in

exhaust bolt pattern| dual, stock and spread
exhaust port shape | square

weight |
approx price bare | $395 each
approx price comp. |
part number bare | M-6049-E351
part number comp. |
CARB approval |
comments | made by Dart, intended for high RPM drag racing or
. | oval track 351W engines, may be too large for most
. | 302/5.0, available bare only

unattributed data | Hot Rod, Ford Cylinder Head Guide, Sep 94

=====================================================================

head mfr, model | Ford Motorsport SVO "Yates" C3 high port
head type | Cleveland
material | aluminum
chamber size | 40.0 cc

intake valve | 2.100
exhaust valve | 1.600

intake valve seat | insert
exhaust valve seat | insert

intake valve length |
exhaust valve length|

intake port volume | 210cc
exhaust port volume | 119cc

valve material |
valve guides | insert
flow |
chamber shape |
spring size |
studs | screw in

exhaust bolt pattern|
exhaust port shape |

weight |
approx price bare |
approx price comp. |
part number bare |
part number comp. |
CARB approval |
comments | price listed as $1229.95

unattributed data | Hot Rod, Ford Cylinder Head Guide, Sep 94

=====================================================================

head mfr, model | Ford Motorsport SVO "Yates" C3L high port
head type | Cleveland
material | aluminum
chamber size | 67.0cc

intake valve | 2.100
exhaust valve | 1.600

intake valve seat | insert
exhaust valve seat | insert

intake valve length |
exhaust valve length|

intake port volume | 210cc
exhaust port volume | 119cc

valve material |
valve guides | insert
flow |
chamber shape |
spring size |
studs | screw in

exhaust bolt pattern|
exhaust port shape |

weight |
approx price bare |
approx price comp. |
part number bare |
part number comp. |
CARB approval |
comments | price listed as $1229.95

unattributed data | Hot Rod, Ford Cylinder Head Guide, Sep 94

=====================================================================