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Whats the difference between the GT and XR8 Boss 290 

 

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AllanHat
 Post subject: Whats the difference between the GT and XR8 Boss 290
Posted: Sat Jan 20, 2007 8:37 am 
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Can someone tell me the difference between the Boss 290 on the GT and XR8 please

 

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Leroy
Posted: Sat Jan 20, 2007 8:59 am 
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i thought the xr8 was only 260

 

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AllanHat
Posted: Sat Jan 20, 2007 9:27 am 
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OK then is the GT Boss 290 unique in any way compared to other 290's?

 

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EL XR8
Posted: Sat Jan 20, 2007 9:57 am 
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Nope.
The XR8's had the 260. The GT, GT-P, Pursuit and Super Pursuit all got the Boss 290 motors, which are all the same.
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prydey
Posted: Sat Jan 20, 2007 10:57 am 
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^^^ what he said. + the force 8. all fpv v8's are 290

 

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fordfreak ef
Posted: Sat Jan 20, 2007 5:24 pm 
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XR8=260kw..
GT BOSS=290KW..

GT cams are more aggressive..
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data_mine
Posted: Sat Jan 20, 2007 7:21 pm 
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BOSS290 is 11.5:1 compression, bigger cams (and they're hollow), some other changes (floating gudgeon pins).

BOSS260 is 10.5:1 compression, regular cams, regular pistons.

The FPV site tells what's different.
http://www.fpv.com.au/cars/gt/enginetra ... block.aspx
http://www.fpv.com.au/cars/gt/enginetra ... heads.aspx

 

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XR9UTE
Posted: Sun Jan 21, 2007 3:26 am 
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{USERNAME} wrote:
BOSS290 is 11.5:1 compression, bigger cams (and they're hollow), some other changes (floating gudgeon pins).

BOSS260 is 10.5:1 compression, regular cams, regular pistons.

The FPV site tells what's different.
http://www.fpv.com.au/cars/gt/enginetra ... block.aspx
http://www.fpv.com.au/cars/gt/enginetra ... heads.aspx


I think you meant to say;
290 = 10.5:1
260 = 9.5:1
Rods are slightly different too.

Cheers,
Pete.
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data_mine
Posted: Sun Jan 21, 2007 8:10 am 
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Ahhh, yup.

I guess most of the performance gained is from the cam grind and compression rise. The other things are done for reliability.

 

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brendo_83
Posted: Mon Jan 22, 2007 5:08 pm 
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{USERNAME} wrote:
Ahhh, yup.

I guess most of the performance gained is from the cam grind and compression rise. The other things are done for reliability.


not to mention keeping the driveability and fuel consumption to an acceptable level. people these days want a car that will put around on the smell of an oily rag, and still have a firebreathing monster under the right foot, should they so decide, its a tough balancing act for a car company to produce.
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data_mine
Posted: Mon Jan 22, 2007 11:47 pm 
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Given the option, gimme a lumpy a** idle and big torque. :D

 

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AXR88U
Posted: Wed Jan 24, 2007 10:59 pm 
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I believe the 290 got forgies

 

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