Cylinder Heads

At CHI we have been working with Australia's leading performance automotive aluminum foundry to bring to you, the consumer the best cast cylinder heads and manifolds on the market today.

Careful consideration has been given to every part of the casting process, to keep the cast finish on our cylinder heads and manifolds uniform and as smooth in texture as humanly possible.

All our cylinder heads come fitted with premium quality manganese bronze valve guides that are reamed first and then diamond honed to size. All our cylinder heads also come fitted with high nickel chrome cast iron inserts, are finish machined, and every batch is checked for valve seat concentricity, an often forgotten measurement in most high production environments.

This combination of accurate machining and quality insert material is ideally suited to today's unleaded fuels.

Another area where attention to detail sets us apart from the pack, is in the careful placement of the individual cores that make up our castings. This attention to detail has virtually eliminated core shift, ensuring our intake and exhaust ports flow near identical amounts of air from port to port without the need for expensive CNC porting.

Making sure we have the best castings in the business is only part of the formula to our success. Airflow is one of the other main ingredients to our success, and moving large amounts through the smallest possible ports is our specialty.

This is the reason our Cleveland cylinder heads, have been the preferred choice of the worlds best engine builders in the 2002 & 2004 Engine Masters Competitions.

Last of all, but by no means the least important, is our revolutionary combustion chamber design. We have perfected the balance between keeping our valves free from shrouding within the smallest possible combustion chamber surface area, per cc in volume.

By keeping the combustion chamber surface area as small as possible, it enables the most complete combustion burn with the least possible lead time for ignition. Less ignition lead means the duration of the combustion process is minimized, and thus the engine has less time to pre-ignite and detonate.

The other benefit of keeping the chamber as small as possible is maintaining a high quench area. This is paramount with today's pump fuels and also aids with detonation control.

Anyway don't take our word for it, see what one of the worlds finest engine builders, Jon Kaase, had to say about our cylinder heads and manifolds after having used them in the 2004 Engine masters Competition.

Jon is no stranger to cylinder heads, having redesigned the Super Cobra Jet Big Block Ford head, as well as his own canted valve Windsor cylinder head. His engines have also won no fewer than last 10 consecutive IHRA Pro Stock championships in the US.

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