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xr6 head 

 

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 Post subject: xr6 head
Posted: Mon Dec 01, 2008 1:59 pm 
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do xr6 heads have bigger ports/valves than standard heads ?
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Posted: Mon Dec 01, 2008 2:45 pm 
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yes..
they have slightly larger exhaust valves and stronger valve springs.
im not sure about the ports..
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Posted: Mon Dec 01, 2008 4:01 pm 
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Depends which model but the exhaust ports on an XR head are 41mm and on a standard they are 39mm. The AU heads have 41mm standard.

 

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EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come

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Posted: Mon Dec 01, 2008 7:28 pm 
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GeZza200 wrote:
Depends which model but the exhaust ports on an XR head are 41mm and on a standard they are 39mm. The AU heads have 41mm standard.


you mean the exhaust valves are 41mm..???
the port sizes are different to the valve sizes..
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Posted: Tue Dec 02, 2008 8:54 am 
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TROYMAN wrote:
GeZza200 wrote:
Depends which model but the exhaust ports on an XR head are 41mm and on a standard they are 39mm. The AU heads have 41mm standard.


you mean the exhaust valves are 41mm..???
the port sizes are different to the valve sizes..


Yep the valves sorry.

 

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EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come

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Posted: Tue Dec 02, 2008 9:11 am 
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ring Rob at abbott engines on the Gold Coast. If you need head work done seriously get this bloke to do it too. he has billets of the DEV5 too :)

 

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