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au3 head vs xr6 head 

 

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 Post subject: au3 head vs xr6 head
Posted: Fri Jul 02, 2010 9:19 pm 
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Ride: au3 SR falcon

Location: sydney
NSW, Australia

I was wondering what is the difference between the head on my au3 and the head on an xr6?
I asked someone that works for ford and they say they are the same. Sorry I just can't buy that, there has to be a difference and its driving me nuts trying to find out. Does anybody know? :? :? :?
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 Post subject: Re: au3 head vs xr6 head
Posted: Wed Oct 20, 2010 8:16 pm 
Getting Side Ways
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Ride: AU falcon

Location: toongabbie
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au heads have the 41mm exhaust valves, just like a the xr6 ones.

putting on a xr6 head on all you will gain the T on the front.

 

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 Post subject: Re: au3 head vs xr6 head
Posted: Wed Oct 20, 2010 8:23 pm 
Stock as a Rock
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Ride: FG G6E TURBO

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Location: Frankston
VIC, Australia

i know for a fact that they are very different, bigger exhaust valves [ larger ] different inlet port and bowl above the valve is better designed for flow and differant cam depending on year and model , do some research on them the specs are out there.
cheers
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 Post subject: Re: au3 head vs xr6 head
Posted: Fri Oct 22, 2010 9:47 pm 
Getting Side Ways
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PSI Taxi wrote:
i know for a fact that they are very different, bigger exhaust valves [ larger ] different inlet port and bowl above the valve is better designed for flow and differant cam depending on year and model , do some research on them the specs are out there.
cheers



All AU heads have the same sized valves, XR or not.

 

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 Post subject: Re: au3 head vs xr6 head
Posted: Sat Oct 23, 2010 7:17 am 
Stock as a Rock
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Ride: FG G6E TURBO

Power: 285 rwkw

Location: Frankston
VIC, Australia

yes sorry i stand corrected, only eb- el xr had larger exhaust valves :oops:
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 Post subject: Re: au3 head vs xr6 head
Posted: Fri Apr 08, 2011 2:47 am 
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tickford_6 wrote:
PSI Taxi wrote:
i know for a fact that they are very different, bigger exhaust valves [ larger ] different inlet port and bowl above the valve is better designed for flow and differant cam depending on year and model , do some research on them the specs are out there.
cheers



All AU heads have the same sized valves, XR or not.


Does this include the EL-AU hybrid?

 

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 Post subject: Re: au3 head vs xr6 head
Posted: Tue Apr 19, 2011 8:11 pm 
Getting Side Ways
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puck_lindsay wrote:
tickford_6 wrote:
PSI Taxi wrote:
i know for a fact that they are very different, bigger exhaust valves [ larger ] different inlet port and bowl above the valve is better designed for flow and differant cam depending on year and model , do some research on them the specs are out there.
cheers



All AU heads have the same sized valves, XR or not.


Does this include the EL-AU hybrid?



I've never had an EL hybrid motor apart before so I can't say one way or the other.

 

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 Post subject: Re: au3 head vs xr6 head
Posted: Tue Apr 19, 2011 10:31 pm 
Getting Side Ways
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Ride: BA Falcon XT

Location: Smithfield
NSW, Australia

Well, AU mp heads are different to HP heads so there must be something that is different? the valves are the same and the cam gear but there must be some porting differences?

It appears that the XR HP and VCT heads have different length valve guides.
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 Post subject: Re: au3 head vs xr6 head
Posted: Tue Jun 07, 2011 10:10 pm 
Oompa Loompa
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Ride: EL XR6

Location: THORA
NSW, Australia

Papa Smurf wrote:
Well, AU mp heads are different to HP heads so there must be something that is different? the valves are the same and the cam gear but there must be some porting differences?

It appears that the XR HP and VCT heads have different length valve guides.


May I ask a noob question? What is MP & HP? I could guess high performance but not sure of the m - maybe medium?

Shane
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