Runner, valve and rocker locations remain in a stock position so that any over the counter components can be used. This will reduce the cost of fitting these new race winning heads to your engine by being able to fit your existing components straight on without any custom modifications to intake manifolds or exhaust systems.

EXHAUST RUNNERS

The Exhaust design has been heavily modified to increase flow throughout the lift range.

The valve bowl has been revised to increase low lift flow producing a much more efficient intake/exhaust relationship known as "volumetric efficiency". This assists with cylinder emptying reducing pumping losses allowing for less exhaust duration.

The exhaust port shape has been changed from an oval to a round port by filling in the floor of the port resulting in a high port effect. The roof of the port and the bolt pattern has not been changed allowing for the use of existing exhaust manifolds or extractors. This eliminates the need to have expensive custom exhaust systems made to suit.

The new generation intake runners have been heavily modified and tested to achieve the correct cross sectional taper to create the "RAM AIR INDUCTION" effect, allowing an engine to produce more power than the airflow figures may suggest.

With airflow of 620 hp out of the box, they are the world's most powerful 2v Cleveland cylinder head.

Intake runner volume, size, location, airflow quality and velocity are the key factors in producing a cylinder head that works. These heads have enough airflow volume to feed a 400 cu.in engine to just over 7500 rpm.


THE COMBUSTION

This new 60cc chamber is designed to minimize detonation by increasing quench area and swirl allowing for a more efficient and complete burn with less Ignition Timing.

As these are Australian designed and made heads it is only natural to assume that the Aussie magazines will be the first the review them.

Here are 4 articles from the performance and Hot Rod/Street Machine magazines on these heads. Each document file is around 100kb so they may take a little while to load on a dialup connection. They will open in a new window, simple close the window when you are finished.

Please note all prices in the articles are Australian and not relative to this auction. AFD phone numbers are listed in the articles. If you feel the need to call AFD for additional information please do so.

Australian Street Machine Review

Performance Ford Magazine

Performance Buildups Magazine Page 1

Performance Buildups Magazine Page 2

351 Cleveland test engine specs

Stock 351c crank
2 bolt block
302c rods (6.035")
A.C.L cast pistons flat top
10.8:1 compression ratio
T.F.C 2v Intake
A.F.D Alloy heads
2.125"/1.655" valves
Flat tappet Crane F246 camshaft (.570/.590" lift 246/256 degrees @.050")
Standard oil system
1-3/4 street pipes 4 into 1 headers (Pacemaker)
Pump fuel (Shell Optimax)
Rollmaster timing chain and gears
Bosch hei ignition system
750dp Holley carb


This engine was put into an every day driven car weighing 3450lbs, auto trans, 4700 rpm stall converter, 4.11:1 gears, street radial tires and full exhaust system and so far has run 11.80 sec @ 115 mph with wheel spin off the line. This simple combo is easily good for a 10 second pass.

FAQ


Q: Is there any shipping charge?
A: No, the price includes shipping to your door (Lower 48).


Q: Do you offer a other CC chambers?
A: Yes we do, please ask for details!


Q: Do you offer a 4V Alloy head?
A: Absolutely! Ask for details.


Q: What cam do you suggest?
A: I don't have any specific cam preferences. Most of the cams available off the shelf or catalogue have to much exhaust duration for these heads, they are best used with 6 degrees more on the exhaust than the intake and ground on a 108 lobe center separation angle. After ordering we can recommend a cam once we know: Engine capacity, Fuel rating, Compression ratio, Transmission/gearbox, Differential ratio/tire diameter, Intake manifold RPM range required, Header diameter.


Q: Can we call you?
A: 503-804-3117 10am - 10pm PACIFIC


Q: Can I use dome or pop up pistons.
A: The pop up pistons can be used, but some reshaping of the dome will be required. Originally they were designed for a flat top piston. Before deciding on a pop up pistons I would advise that chambers be cut down to low 50cc's before piston to valve clearance becomes an issue. This would result in over 12:1 compression ratio. Much better flame travel with flat top pistons.


Q: Can I use these on my Windsor Block (Clevor).
A: Yes, in fact we will supply the heads to you with the Clevor modifications already completed. Ask for details.


Q: What is I want to run a blower or turbo, can you supply larger chambers?.
A: Yes we can. Ask for details.


Q: What cars can run these heads?
A: Any vehicle that has a 351 2v, small block Ford, 351-c 4/v, 400 4bbl, Aussie 351C or 302C, 351w 2/v, 400m 2bbl, 351-w or a 4v 400-m. Some examples are the Cobra, Galaxie, Cougar, Ford racing GT, Detomaso, Ford cobra jet, F-series, Mangusta, SVT, Torino, Bronco, Ford Truck, Pantera, Drag cars, Windsor, SVO, Comet, Fairlane, Mustang, Mach 1, F Series, street rod, horsepower, closed chamber, Ford motorsport, Ranchero, Aussie falcon, Mach one.