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which 3.9/4.0 head is the best? 

 

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 Post subject: which 3.9/4.0 head is the best?
Posted: Wed Mar 18, 2015 6:30 pm 
Oompa Loompa
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Age: 32

Posts: 32

Joined: 11th Apr 2012

Ride: 99 fut wgn/00 ute-99 ghia

Location: tamworth
NSW, Australia

Before you say check out the stickys i did, none of the links are working?
I'm building an au falcon street stocker speedway sedan and tickford heads are banned. Are there any heads e series or au that stand out from the rest?
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 Post subject: Re: which 3.9/4.0 head is the best?
Posted: Wed Mar 18, 2015 7:04 pm 
Technical Contributor
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Age: 60

Posts: 6817

Joined: 22nd Jun 2005

Gallery: 8 images

Ride: EF Fairmont

Location: Campbelltown
NSW, Australia

AU heads are have the same size valves as the XR heads.
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 Post subject: Re: which 3.9/4.0 head is the best?
Posted: Wed Mar 18, 2015 7:37 pm 
Oompa Loompa
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Age: 32

Posts: 32

Joined: 11th Apr 2012

Ride: 99 fut wgn/00 ute-99 ghia

Location: tamworth
NSW, Australia

Another thread i found suggested that the ef el heads have bigger ports and a better designed combustion chamber.
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 Post subject: Re: which 3.9/4.0 head is the best?
Posted: Wed Mar 18, 2015 7:58 pm 
Getting Side Ways
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Age: 34

Posts: 1110

Joined: 27th Dec 2011

Gallery: 6 images

Ride: ef falcon futura

Power: 154 rwkw

Location: Koo Wee Rup
VIC, Australia

The series 1 au large exh port head is the best head stock for stock.

 

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ef futura, pacemakers, 2.5inch catback, k&n panel filter and 3.45 lsd. extractors/cat, ticky head, custom cam grind, t5. now onto cosmetics.

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