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  #1 (permalink)  
Old 03-08-2002, 07:17 PM
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Cobra Make, Engine: Classic Roadsters, Tweaked 351W, T-5Z, CRII Tech Support Team.
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Default Aluminum Cleveland heads question

A Pantera site in the US has just introduced aluminum 351Cleveland heads for the 351 Ford Cleveland engine. These heads are being imported to the USA from Australia. They are supposed to be made by a company called CHI in Australia, and are being sold in US as C3V head.

The Ford 351 Cleveland engine had a 2 barrel (2V) head with smaller ports and valves, and a 4 barrel (4V) head with bigger ports and valves. The C3V heads have 4V valve sizes, and smaller ports for improved mid range flow and torque. Being aluminum, they weigh half as much.

Cleveland engines were only made in US from '69 - '73. Cleveland engines are plentyful in Australia, so there would be more of a market for a better aftermarket head.

What can you guys tell us about this head?
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  #2 (permalink)  
Old 03-11-2002, 02:30 AM
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Jack, there's an article in one of our magazines about the new heads. I've never had any need for a scanner until now!!!

Until I scan the article, here are a bit of an idea about them:

A more gradual curve on the short turn radius.
Closed chamber design.
More central spark plug location.
High port exhaust runner.
Airspeed high by using smaller runner volume / cross section.
Extra thick deck to suit milling for compression, O-Ringing etc.
Revised coolant jacket design.
215cc port volume.
Up to 2.19 & 1.71" valves.

By their own admission, the runner volumes on their first heads is aimed at high performance street engines. The torque levels achieved are impressive, but the runners will prove restrictive in racing applications. A new revised "race" version are on the way soon.

John the owner of CHI can be reached on 0419 245 265. This is a mobile (cell) phone, and I have NO IDEA if you can call him directly from over there.

The engine builder that had some input into the design is Con at Performance Race Engines 0011 613 9357 7668.

Hope this helps,
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  #3 (permalink)  
Old 03-11-2002, 06:44 PM
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Was there a website listed in the article? That would be the easy way. Don't go buying a scanner for my benefit. I'll e-mail you my snail mail address. You can make an ordinary photocopy and mail it.

Made a prediction about a year ago, that someone would develop an aluminum Cleveland style small block Ford head that would put everything else to shame. It had to happen. The potential is there. This may be it.
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