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Block and Piston Specs for AU Engine Needed 

 

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 Post subject: Block and Piston Specs for AU Engine Needed
Posted: Wed Nov 09, 2016 3:08 am 
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Age: 59

Posts: 8

Joined: 27th May 2010

Ride: Ford/Mustang 1965

Location: Hurricane, WV
Oustide Australia

This is a cross post from another forum, so I apologize in advance.

I need some specifications for my AU 4.0 engine to calculate the static compression ratio if I install a Tickford 94DT head. I've been told that the Tickford 94DT head has a chamber volume of 60cc, whereas the AU head is 65cc. I will cc the Tickford head after machine work to be sure. I want to keep the CR below 10.0 to be able to still use premium unleaded (93 Octane in the USA). I don't want to pull the current AU head until I have everything ready to install.

What is the stock compression height (CH) of the AU 4.0 piston?
What is the recess volume of the stock AU piston?

I've seen websites stating compression heights of 1.208", 1.215", and 1.2165".
Very confusing.

The other question I have is the stock AU block, or deck height.
Doing a search of other forums I came up with a post stating that the deck height is "somewhere" around 9.2-inches. Another website stated the deck height as 9.22-inches.
I don't have access to local (Australian) reference material so I can't look it up.
So I'm wondering what the stock deck height of the AU block is?

Any help is appreciated.

 

_________________

Dan

Currently Own
1965 Mustang, 200CID, 3Spd
1964 Corvair Coupe, 164CID, 140HP, 4Spd
2017 BMW X3, 3.0L Turbo, 300HP, 8-Spd Auto

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