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FLATHEAD CYLINDER HEADS

Made from heat treated aluminum(T6) they feature double the water capacity of an OEM head with an internal channel to provide even water distribution. Thermostat housings are included which have a 1½" neck diameter and hose adapters are available to fit original Ford hoses which have a 1¾" inside diameter. Thermostats, housings and hardened washers are also included and the centre outlet head can be ordered with provision for clamping a post style distributor.
The chambers are of a turbulent design and being one inch thick allow up to 11/16" hi-dome pistons with the shape promoting high flow while maintaining compression. The chambers are .425 deep over the intake valve, .375 over the exhaust valve and measure 67cc's.
To achieve the best results from these heads the block should be relieved .100 and a template is included for this purpose.
Extra material thickness is provided to each end of the early heads and on the rear of the late heads for the fitting of temperature senders, and it is recommended that a cross over hose be added joining the rear of each head with a minimum diameter of 1/2 inch to equalize the temperature between each side of the engine.
The spark plug is located centrally in the transfer area which will result in the engine requiring less total timing.
NGK B5ES spark plugs set at .030 are recommended, for performance applications, a colder heat range would be more desirable with the numbers increasing as they go colder.

This cutaway view of the cylinder head shows the quality of the casting and the unique internal coolant passage which provides a more consistent temperature, eliminating hot spots.

OEM Cast Iron Head .415 Deep 82cc
Lift.075.150.225.300.375
CFM22.638.953.165.572.6

Offenhauser .425 Deep 66cc
Lift.075.150.225.300.375
CFM2746.659.26872.6

Flat Attack .425 Deep 67cc
Lift.075.150.225.300.375
CFM26.24659.669.375.6

CYLINDER HEADS $1,500AU

Polishing also available;
Top of fins and around the outside, add $350 (pair)
Full Polish, add $450 (pair)

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Detail showing placement of holes to be drilled in each cylinder head for accessory cross over hose and temperature gauge.

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ECO COOL

I use and recommend this product when fitting my cylinder heads to prevent corrosion.

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FLAT ATTACK RACING PRODUCTS  © 2000-2015 All Rights Reserved
MIKE DAVIDSON PO Box 1348 Victor Harbor SA 5211 Australia
[P]0011 61 8 8554 7141 [M]0011 61 412 002 617 [F]0011 61 8 8554 7148 [E] mrd@dragnet.com.au