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 Post subject: BA XR8
Posted: Mon Jul 24, 2006 11:32 am 
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Hi There guys! Just a few questions My brother in law has a 2004 ba Xr8 and his mate has an Xr6 turbo. The problem is he always gets his a** kicked by him.Mods his done is SS induction,Exhaust cat back and throttle body,Any one have any ideas what the problem is? Its not his driving cause i raced his mate for him and the same story wins by Half car to a car lenght all the time? His mates car is stock! and the other Question is If u take the car back to ford for a service do the de tunr the computer even though they say they had to upgrade it????????
Cheers muzza
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Posted: Mon Jul 24, 2006 11:36 am 
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XR6T is quicker than the XR8 from factory.

Can you word your question about the computer bit again it doesnt make sense.

 

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Posted: Mon Jul 24, 2006 11:50 am 
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The computers gettign detuned were only for the BA series 1 4L engines, as they had problems with them as i recall.
The XR6t is a faster car, mod for mod it will always be in front. The Boss lacks too much in down low torque, and ain't impressive enough up top.
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Posted: Mon Jul 24, 2006 12:31 pm 
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Give the xr8 an edit/tune, itll go go alot better..

xr6t still gonna have a hand up if he gets a edit/tune too but..

 

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Posted: Mon Jul 24, 2006 12:33 pm 
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YTMONT wrote:
The computers gettign detuned were only for the BA series 1 4L engines, as they had problems with them as i recall.
The XR6t is a faster car, mod for mod it will always be in front. The Boss lacks too much in down low torque, and ain't impressive enough up top.


were all cars detuned? or do you have to get it done seperately? I've got a series 1.

 

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Posted: Mon Jul 24, 2006 4:22 pm 
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only early xr6t's were reflashed due to overboost issues. stock for stock the xr8 is actually quicker in every mag i've read than the xr6t. motor actually got a 13.99 from the xr8. stock xr6t (post flash) struggle to crack 14.5. however all cars are different so you may end up with a very healthy one. in gear acceleration is a diff. story though. turb generally is quicker in this area.

workmates mate just bought an o4 xr6t and dyno showed 201rwkw. thats a very healthy example. i've seen figures as low as 160 - 180.
not all cars are created equal.

 

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 Post subject: Re: BA XR8
Posted: Mon Jul 24, 2006 8:20 pm 
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MADMUZZA wrote:
Hi There guys! Just a few questions My brother in law has a 2004 ba Xr8 and his mate has an Xr6 turbo. The problem is he always gets his a** kicked by him.Mods his done is SS induction,Exhaust cat back and throttle body,Any one have any ideas what the problem is? Its not his driving cause i raced his mate for him and the same story wins by Half car to a car lenght all the time? His mates car is stock! and the other Question is If u take the car back to ford for a service do the de tunr the computer even though they say they had to upgrade it????????
Cheers muzza



the turbo is much quicker over the 1/4
but about same top end speed

 

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Posted: Mon Jul 24, 2006 8:35 pm 
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Suggest to him to change his diff gears and then race the turbo 6.I bet he will like the upgrade.Will help the 8 accelerate more quicker.

 

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Posted: Tue Jul 25, 2006 11:35 am 
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if you run a 3.7 ratio in the diff you will see improvements the xr8 utes run this ratio and the sedans have a 3.45 ratio but give the xr8 an edit and a set of underdrive pullys and youll see the xr6 turbos head lights in the rear veiw mirror if the xr8 is manual you will loose alot on the shift try putting in a shortened gear leaver so the throw to each gear is shorter

 

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Posted: Tue Jul 25, 2006 12:03 pm 
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it all comes down to mods.. but as said the XR6T is the faster one when stock
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Posted: Tue Jul 25, 2006 2:30 pm 
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Shum's EL wrote:
it all comes down to mods.. but as said the XR6T is the faster one when stock


every article i've ever read the xr8 is quicker than the turb in a straight line. not by much but it is quicker. in gear acceleration may favour the turb but not sure. around a track the turb is quicker as the xr8 suffers from the wieght up front.

so, in stock form the xr8 is quicker down the 1/4

 

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Posted: Tue Jul 25, 2006 8:01 pm 
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Guys the XR6T wasnt exactly "detuned" they leveled out the boost. As from what i have read and heard from guys who own the cars and some who work for ford, the early XR6T suffered from a boost spike, which gave you that kick in the guts they all knew and loved, but when they "detuned" when in reality they reflashed them, all they did was make the boost come on alot smoother and more constant trather then one big hit of boost out of nowhere (similar effect that nos has).

 

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Posted: Tue Jul 25, 2006 8:21 pm 
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Go the XR8 mate, i drag my mate in his ba xr6t and bet him but only just in my bf xr8. But all cars are a little diff when made belive it or not there are some freaks out there iv seen it no mods stock as a rock betting my modded up car same year same model....makes u wonder hey.

 

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Posted: Tue Jul 25, 2006 9:40 pm 
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prydey wrote:
Shum's EL wrote:
it all comes down to mods.. but as said the XR6T is the faster one when stock


every article i've ever read the xr8 is quicker than the turb in a straight line. not by much but it is quicker. in gear acceleration may favour the turb but not sure. around a track the turb is quicker as the xr8 suffers from the wieght up front.

so, in stock form the xr8 is quicker down the 1/4


really?
i havent seen any that say that...
cars magazine didnt, car point didnt...

anyway, regardless, the XR6T is lighter therefore much quicker off the line.
i dunno a hole heap about the boss engines, exept they weigh a tonne, but if people are correct saying they lack low end tourque, it all makes sence.
anyway.... spend $3500 and get a stage 3 turbo upgrade- 350 kw they rekon (flywheel i assume)
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Posted: Tue Jul 25, 2006 9:40 pm 
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gt-cobra wrote:
if you run a 3.7 ratio in the diff you will see improvements the xr8 utes run this ratio and the sedans have a 3.45 ratio


Err.... do u mean they get this from factory, or are you talking aftermarket.. Mine has a 3.48 lsd from factory...

 

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