3V 225cc

*All our 3V 225cc heads now come with STD height exhaust ports. Raised runner exhaust ports can be ordered at no extra charge*

All our Cleveland cylinder heads (bare and assembled) now come with free CNC chambers. (That's AU$200 / US$175 worth of value added, at no extra charge.) PLUS All our cylindr heads have the bowl area and short turn radiuses professionally hand blended at no extra charge.

3V 225cc 340cfm (700+hp) SB Alloy Heads

Product ID: CHI 3V 225cc Bare

	Price - 1 Pair (AUD) Price - 1 Pair (USD)	$1999   $1799
	Payment Terms Purchase now and receive free CNC chambers (valued AU$200 / US$175).

Description:

The all new 3V 225cc cylinder heads replace the older 218cc heads and are suited for use on competition and serious street engines of up to 400+ cubic inches in size and making up to and in excess of 650+hp. The new 225cc feature the same minimum cross section (2.4") as the 218cc intake ports are designed to deliver maximum power and torque, for those people not concerned by RPM limitations, but rather wanting to make the most possible torque and horsepower for their competition to wild street power plants.

With just a modest increase of 7ccs, and with no change to the minimum cross section, we have managed to extract 340cfm from our new 225cc port without hurting the all important low lift numbers. Again the emphasis was on keeping the port as small as possible whilst increasing airflow as much as possible. No other Small Block Ford - Cleveland cylinder head on the market today has the same airflow per CC of runner volume.

By utilizing the advantage of a taller than standard, 4V intake port height, and downsizing the port to a mere 225ccs, we have created an intake port capable of producing in excess of 700hp, whilst still having the ability to make exceptional torque along the way. Just take a look at Jon Kaase's winning entry in the 2004 Engine Masters competition. The engine had a peak of 700hp horsepower at 6500rpm and peak torque of 620ft/lb. All of this on straight pump gas and by a mere 6500 rpm.

Just like its predecessor (the 218cc) the 3V 225cc cylinder heads intake ports have .600" radiuses in all 4 corners, riding the port of any stagnant air and further promoting a more complete and uniform air flow pattern through the intake port, which ultimately lessens the chance of fuel dropping out of suspension from the air and promotes excellent Wet Flow Quality.

Coupled with our matching high velocity 3V 4150 Holley and 4500 Dominator intake manifolds, (as also used by Jon Kaase's winning 2004 Engine Masters Entry), the package is the ultimate choice for the wild street car and or competition enthusiasts wanting maximum torque and horsepower from their Small Block Fords. Our manifolds come ready with cast Fuel Injection - Nitrous bosses. With only minor machining our manifolds can be easily adapted to either nitrous or fuel injection, giving our customers the ease and flexibility to be able to upgrade as they wish.

At CHI we believe in offering our customers cylinder head and manifold combinations that are tailored to their horsepower requirements, and the 3V 225cc cylinder head and manifold combinations are not only the choice of World Champion Engine Builders like Jon Kaase, but are also quickly becoming the popular choice of the serious street - competition engine builder and car enthusiasts, world wide.

Proving the performance potential of our cylinder heads, rather than just providing you with estimations based on flow figures alone is also important to us. To this end we participate and sponsor competitions like the Engine Masters, as well as extensively dyno test our products (take a look in our articles section to read about Muscle Mustangs & Fast Fords independent testing).

If that's not proof enough, then take a look in our articles section at our 427 Pump Gas Test Engine write-up, as well as the dyno graph below. This engine runs our as cast 3V225 Roller Assembled heads and as cast 3V 4500 manifold. To further prove the engines capabilities, we ran it in a 3540lb Falcon (click for photo) and have so far run a best time of 10.0 @ 136mph!

So what type of power can you expect to make with our 3V 225 heads:

Click here to enlarge

Flowchart:

Click here to enlarge

4V CNC Chambers

Product ID: 4V CNC Chambers

	Price - 1 Pair (AUD) Price - 1 Pair (USD)	$190   $171
	Payment Terms

Description:

Owners of raised dome, high compression pistons to suit 4V closed chamber heads, can now order CHI heads with a 4V CNC chamber. Our 4V CNC chambers are 74cc in volume and retain our relocated spark plug location. These can also be ordered as an option by people that require increased chamber volumes for blown or stroker applications. The need to replace those high compression 4V pistons is now a thing of the past.

3V CNC Chambers

Product ID: 3V CNC Chambers

	Price - 1 Pair (AUD) Price - 1 Pair (USD)	$190   $171
	Payment Terms

Description:

Although we CNC all our chambers as part of our manufacturing process, the step over we use is.030". This allows us to economically add this process to all our cylinder heads without adding any further expense.

For customers that want the ultimate in CNC finish we also offer a .020" super fine step over CNC chamber option. The CNC program like our standard program, gives our standard deck height heads, a chamber volume of approximately 68-70cc (depending on valve choice), with a much smoother finish.

Also available are small chamber options where we "lift" the chamber in the cylinder head so you don't have to mill down the deck face. This option will add a further $100USD and or $150 AUD to the cost of the fine step-over program. Please call or email to discuss this option further, as there are many chamber volumes we can accommodate.

3V 225cc Street Assembly 8005A

Product ID: CHI 3V 225 S/A 8005A

	Price - 1 Pair (AUD) Price - 1 Pair (USD)	$2850   $2565
	Payment Terms Purchase now and receive free CNC chambers (valued AU$200 / US$175).

Description:

This complete Street cylinder head package comes with Ferrea 5000 series stainless steel valves with hard chromed stems. We use Isky Chrome-Molly-7 Degree Retainers, Isky Machined Valve Locks (not the cheaper stamped steel versions), and Isky 8005A Triple Competition valve springs.

This package is ideal for large solid cams of up to .625" lift (be sure to subtract valve lash from your camshaft specs when determining net valve lift), and is ideal for the serious street car that is raced on the odd occasion. Heads are finished of with matching Isky hardened spring pad locators to positively locate the valve spring and Viton valve stem seals for unsurpassed oil control.

3V 225cc Competition Assembly 8005A

Product ID: CHI 3V 225 C/A 8005A

	Price - 1 Pair (AUD) Price - 1 Pair (USD)	$3000   $2700
	Payment Terms Purchase now and receive free CNC chambers (valued AU$200 / US$175).

Description:

This complete Competition cylinder head package comes with Ferrea 6000 series swirl polished stainless steel valves with hard chromed stems. We use Isky Chrome- Molly - 7 Degree Retainers, Isky Machined Valve Locks (not the cheaper stamped steel versions), and Isky 8005A Triple Competition valve springs.

This package is ideal for large solid cams of up to .625" lift (be sure to subtract valve lash from your camshaft specs when determining net valve lift), that are raced on a regular basis. Heads are finished of with matching Isky hardened spring pad locators to positively locate the valve spring and Viton valve stem seals for unsurpassed oil control.

3V 225cc Roller Assembly Nextek 221424 Roller Springs

Product ID: CHI 3V 225 R/A 221424

	Price - 1 Pair (AUD) Price - 1 Pair (USD)	$3900   $3510
	Payment Terms Purchase now and receive free CNC chambers (valued AU$200 / US$175).

Description:

Our complete Competition Roller Cam cylinder head package comes with Ferrea Competition Plus series swirl polished stainless steel valves with hard chromed stems. We use Manley Titanium 10 Degree Retainers, Manley Machined 10 Degree Valve Locks and Manley Nextek 221424 Competition Roller valve springs.

This package is ideal for large roller cams of up to .800" valve lift , that are drag - road raced on a regular basis. Heads are finished of with matching Manley hardened spring pad locators to positively locate the valve spring and Viton valve stem seals for unsurpassed oil control.

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