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 Post subject: XR6
Posted: Sun Apr 30, 2006 9:29 pm 
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Hey,
just wondering... what was the difference in power between stock au falcon motor output and au xr6 output.

what was done to the motor to give it that extra bit, eg mods.

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Posted: Sun Apr 30, 2006 9:31 pm 
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depends if the VCT donk or not. the normal one is different cam, ecu, higher fuel pressure reg, larger exhaust valves, higher ratio diff.

 

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Posted: Sun Apr 30, 2006 9:32 pm 
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AU XR6 have VCT engine, standard falcon doesnt

falcon - 157Kw
XR6 - 164Kw

 

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Posted: Sun Apr 30, 2006 9:33 pm 
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Standard AU and XR's have the same sized valves

and not all had VCT (very few did IIRC)

 

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Posted: Sun Apr 30, 2006 9:36 pm 
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yeh there was an XR6 HP which had the standard AU motor. Disco Frank has one from memory

 

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Posted: Sun Apr 30, 2006 9:40 pm 
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nope, the HP was not a standard AU engine

standard au = 157kw
XR6 HP = 164kw (different cam, retuned ECU, 300kpa fuel pressure, and I think it still got a bit of headwork)
XR6 VCT = 172kw and had VCT

 

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Posted: Sun Apr 30, 2006 9:46 pm 
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stockstandard wrote:
Standard AU and XR's have the same sized valves

and not all had VCT (very few did IIRC)


Nah, XR6's have larger exhaust valves (39mm for Falcon, 41mm for XR6)
The 4.0 litre XR motor also copped an increase in compression (9.3:1 for Falcon, 9.35:1 for XR6), head work, valve springs got a 5 percent higher pre-load, camshaft, cooler plugs, recalibrated knock sensor and EEC tweaks. It's a kick a** motor and is noticeably better than a stocker. Revs a lot better and harder too.

Either way:

Falcon = 157kw
Falcon XR6 HP = 164kw
Falcon XR6 VCT = 172kw
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Posted: Sun Apr 30, 2006 9:48 pm 
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downingj wrote:
stockstandard wrote:
Standard AU and XR's have the same sized valves

and not all had VCT (very few did IIRC)


Nah, XR6's have larger exhaust valves (39mm for Falcon, 41mm for XR6)
The 4.0 litre XR motor also copped an increase in compression (9.3:1 for Falcon, 9.35:1 for XR6), head work, valve springs got a 5 percent higher pre-load, camshaft, cooler plugs, recalibrated knock sensor and EEC tweaks. It's a kick a** motor and is noticeably better than a stocker. Revs a lot better and harder too.

Either way:

Falcon = 157kw
Falcon XR6 HP = 164kw
Falcon XR6 VCT = 172kw


Your thinking E-series. All au 6's got 41mm exhaust valves, which also have thinner valve stems compared to e-series

 

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Posted: Sun Apr 30, 2006 9:49 pm 
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stockstandard wrote:
downingj wrote:
stockstandard wrote:
Standard AU and XR's have the same sized valves

and not all had VCT (very few did IIRC)


Nah, XR6's have larger exhaust valves (39mm for Falcon, 41mm for XR6)
The 4.0 litre XR motor also copped an increase in compression (9.3:1 for Falcon, 9.35:1 for XR6), head work, valve springs got a 5 percent higher pre-load, camshaft, cooler plugs, recalibrated knock sensor and EEC tweaks. It's a kick a** motor and is noticeably better than a stocker. Revs a lot better and harder too.

Either way:

Falcon = 157kw
Falcon XR6 HP = 164kw
Falcon XR6 VCT = 172kw


Your thinking E-series. All au 6's got 41mm exhaust valves, which also have thinner valve stems compared to e-series


Really? I know they have thinner valve stems compared to e-series, but I didn't know that a stock AU motor had 41mm exhast valves...You sure? :)
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Posted: Sun Apr 30, 2006 9:51 pm 
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stockstandard wrote:
nope, the HP was not a standard AU engine

standard au = 157kw
XR6 HP = 164kw (different cam, retuned ECU, 300kpa fuel pressure, and I think it still got a bit of headwork)
XR6 VCT = 172kw and had VCT


oops :oops: my bad :P

 

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Posted: Sun Apr 30, 2006 9:55 pm 
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downingj wrote:
stockstandard wrote:
downingj wrote:
stockstandard wrote:
Standard AU and XR's have the same sized valves

and not all had VCT (very few did IIRC)


Nah, XR6's have larger exhaust valves (39mm for Falcon, 41mm for XR6)
The 4.0 litre XR motor also copped an increase in compression (9.3:1 for Falcon, 9.35:1 for XR6), head work, valve springs got a 5 percent higher pre-load, camshaft, cooler plugs, recalibrated knock sensor and EEC tweaks. It's a kick a** motor and is noticeably better than a stocker. Revs a lot better and harder too.

Either way:

Falcon = 157kw
Falcon XR6 HP = 164kw
Falcon XR6 VCT = 172kw


Your thinking E-series. All au 6's got 41mm exhaust valves, which also have thinner valve stems compared to e-series


Really? I know they have thinner valve stems compared to e-series, but I didn't know that a stock AU motor had 41mm exhast valves...You sure? :)


sure am.

And the compression for au's was also 9.6:1 on all 6's

 

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Posted: Mon May 01, 2006 9:01 pm 
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cheers
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