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good alloy heads for the au 5.0 l 

 

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 Post subject: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 8:48 pm 
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guys ive got the 2000 au failane 50.l with the stock heads
so far my mods r pacies, 3'' pacie zorst, cia, elderbrock upper and lower manifold, and cappa tune
what alloy heads im not to worried about $$ but if there are cheaper ones that re good i wont complain :) will be good for mine im also putting a light cam in it
if you know the parts number and the exact ones to get that would be much appreciated cheers fellas

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 9:54 pm 
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AFR165's. End of story.

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 10:00 pm 
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ive heard that my extractors wont work with these heads...I have got gt40p heads and these have raised ports and the spark plugs are on a different angle

what heads will be a direct replacement to suit my extractors?

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 10:26 pm 
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Just to open the story back up, I use the Trick Flow Twisted Wedges and couldn't be happier with them. Both heads perfom pretty much the same, so if you went one or the other, you'd be a pretty happy camper. I wouldn't close the book on either one of them.

I don't recall hearing anything about GT40p headers not fitting either of these heads...

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 10:33 pm 
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so should the same model number afr 165's or the trickflow heads fit on the au ford with after pacemaker headers aswell as fit onto say the eb 5.0 with headers to suit the eb?
does that make sense lol?

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 10:35 pm 
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My EL XR8 has Defilippo 4 into 1s on my TW heads. I bought another EL XR8 with the same headers on a set of GT40ps. I hope that's what you were asking...

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Tue Mar 29, 2011 10:36 pm 
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It's the spark plug angle which interferes with headers on GTP heads...
These headers / extractors can fit on other heads...

Yep I have TFS R series Trick Flow heads heads..

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Wed Mar 30, 2011 5:57 pm 
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yeah scaffy thats what i meant :)
i just heard somewhere the that the extractros from an au 5.0l wont fit on the e series v8s with just the gt40 heads or the other stock ones they come with

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Wed Mar 30, 2011 8:52 pm 
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ea_falcon wrote:
yeah scaffy thats what i meant :)
i just heard somewhere the that the extractros from an au 5.0l wont fit on the e series v8s with just the gt40 heads or the other stock ones they come with


Because E series have to use C*** shaped headers to fit the engine bay.

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Wed Mar 30, 2011 11:04 pm 
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Yeah, AU and E-series have different headers. AFAIK, they're not interchangable.

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Sat Apr 02, 2011 9:24 am 
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so thats my point if i get a set of heads i have to get the ones that suit the au ford and not the e series other wise i will have to customize my extractors to suit the alloy heads

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Sat Apr 02, 2011 9:44 am 
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I believe so Ash.

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Sat Apr 02, 2011 11:08 am 
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I agree with using AFR heads, but I'd suggest the slightly bigger 185's. The AFR185 heads have considerably more potential with minimal sacrifice down low over the 165's. This leaves the door open for future upgrades (eg 347) while knowing the heads will be sufficiently sized. If you do go this way, also get the spring upgrade package as like most other alloy heads the AFR's only come with flat tappet capable springs

All AFR heads are fully CNC ported. I buy the entry level ones that aren't fine finished in the ports, and use a die grinder & cartridge roll to improve the finish. Only a few hours work

The SBF heads mentioned so far have the same exhaust bolt pattern and port location. So headers that fit GT40P heads will also fit all the above alloy heads. It is the primary pipe orientation that changes between "normal" heads and GT40P heads due to the altered spark plug angle, although even this is often way over-stated as being problematic.

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Sat Apr 02, 2011 9:21 pm 
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Only issue with 185's is the pistons require notching...
If using std pistons... P2V Should be checked in any build ..

 

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 Post subject: Re: good alloy heads for the au 5.0 l
Posted: Sun Apr 03, 2011 3:19 am 
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ea_falcon wrote:
so thats my point if i get a set of heads i have to get the ones that suit the au ford and not the e series other wise i will have to customize my extractors to suit the alloy heads


No mate, the reason they are not interchangable is because there's different crap going on in the engine bay. Like was previously said, the steering shafts are in different positions, therefore the headers are designed to suit their application. The exhaust ports are still in the same position on the heads.

 

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