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xr8 5.4l internal engine mods 

 

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 Post subject: xr8 5.4l internal engine mods
Posted: Wed Dec 29, 2010 9:08 pm 
Oompa Loompa
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VIC, Australia

hi there i crently have my xr8 engine diss assembled sitting in peices just wondering whats any worthwhile performance mods i can do before it goes back together cheers
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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Wed Dec 29, 2010 9:52 pm 
EFI Guru
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Manley rods and pistons for compression in the high 10's.
290/302 cams and springs and some port work or, if you want to go further.....a couple of these...
http://www.fordracingparts.com/parts/pa ... ield=10707
But your intake won't fit them so some adaptors or intake mods would be required.
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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Wed Dec 29, 2010 9:53 pm 
Getting Side Ways
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Oil billet pump gears..Depends how much power your after ??

 

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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Thu Dec 30, 2010 12:51 am 
ACT Cruise Moderator
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Ride: '06 BF GT-P

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XR9UTE wrote:
Manley rods and pistons for compression in the high 10's.
290/302 cams and springs and some port work or, if you want to go further.....a couple of these...
http://www.fordracingparts.com/parts/pa ... ield=10707
But your intake won't fit them so some adaptors or intake mods would be required.


Seriously? The BOSS heads are second only to the Ford GT heads (for stock heads)


@OP, decide if you want a n/a or charged build. if n/a then year increase compression ratio and add big cams. if boosted, keep CR stock, and strengthen everything - win.

 

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1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Fri Dec 31, 2010 12:21 am 
EFI Guru
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data_mine wrote:
XR9UTE wrote:
Manley rods and pistons for compression in the high 10's.
290/302 cams and springs and some port work or, if you want to go further.....a couple of these...
http://www.fordracingparts.com/parts/pa ... ield=10707
But your intake won't fit them so some adaptors or intake mods would be required.


Seriously? The BOSS heads are second only to the Ford GT heads (for stock heads)


@OP, decide if you want a n/a or charged build. if n/a then year increase compression ratio and add big cams. if boosted, keep CR stock, and strengthen everything - win.


That's right...they are GT heads! Just the versions used on the GT500.
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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Tue Jan 04, 2011 6:27 pm 
Oompa Loompa
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Ride: ford ba xr8 ute

Location: cranbourne
VIC, Australia

Hi all thanks for all the responses, also just wondering if any one can tell me if the boss 290 pistons will fit in the boss 260 engine for a higher comp ratio also thinking about a hi stall to give it that bit extra on take off but not to much what do you people think
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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Tue Jan 04, 2011 6:32 pm 
ACT Cruise Moderator
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Ride: '06 BF GT-P

Power: 293 rwkw

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adrian collins wrote:
Hi all thanks for all the responses, also just wondering if any one can tell me if the boss 290 pistons will fit in the boss 260 engine for a higher comp ratio also thinking about a hi stall to give it that bit extra on take off but not to much what do you people think


In short, no, you need the rods and pins too. And you'd be wasting the extra compression without the bigger GT cams/head work.

 

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1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

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 Post subject: Re: xr8 5.4l internal engine mods
Posted: Tue Jan 04, 2011 7:40 pm 
EFI Guru
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Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

Location: Perth
WA, Australia

I wouldn't get GT pistons unless you can get them cheap...I'd get Manley,Mahle or other quality aftermarket forged ones and get some beefy rods while you're at it.
http://www.manleyperformance.com/niche/ ... tons.shtml
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