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what engine mods au xr8 

 

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 Post subject: what engine mods au xr8
Posted: Sun Mar 04, 2007 7:07 pm 
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Ride: au xr8, eb2 gli

Location: toowoomba
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hey guys what engine mods are giving good results with your au xr8s? ive just installed an ss induction kit on mine

 

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Posted: Sun Mar 04, 2007 9:30 pm 
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Power: 161 rwkw

Location: Rockhampton
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It takes a lot of $$$$ to make them go hard. Its just one of those engines.
As a comparisson, a 5.0lt Holden V8, spend $5K on and it goes hard, and to get the Ford 5.0lt to go the same, about $10K or more.
Its a shame really.
Another set of heads, another inlet manifold, headers, Throttle body, MAF sensor, the list goes on.
It does depend on what your after in the power side of things.

 

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Posted: Tue Mar 06, 2007 11:21 pm 
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Ride: AU XR8

Location: Wollongong
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Is it a 185, 200, or 220kw motor?

All the 185's need is a bigger cam...

cjh, you are confusing the E-Series V8 with the AU V8. AU is much better in all the areas you mention.
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Posted: Wed Mar 07, 2007 9:03 pm 
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Ride: au xr8, eb2 gli

Location: toowoomba
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its a 185 man. what cam r u running in yours

 

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Posted: Thu Mar 08, 2007 7:11 am 
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zorst, highflow filter+induction, cam, heads, stroker kit, In that order.

 

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SS Inductions CAI, K&N Filters, M-spec FMC, Turbosmart BOV, 8psi capa tune, X-force cat.

Mods going on: Nizpro springs, bosch 040 pump + Walbro gss341, 600cc injectors, PWR transcooler, 20% Underdrives, 15psi Actuator, Kingspring SSL's, 15psi tune.....More coming

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Posted: Thu Mar 08, 2007 10:43 am 
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Ride: AU XR8

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The std exhaust in the AU XR's is very underated in my opinion. It is far from the first thing I would change. I am yet to be convinced that there is any real value in K&N filters and CAI mods over the std setup.

In my case, I fitted a Crane 2030 with springs and rockers to suit to an otherwise stock AU1 XR8. Power at the wheels went from 136kw to 161kw.

In that spec, I was running 14.5's at 95mph. And this was in an automatic ute (70Kg heavier than sedan).
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Posted: Thu Mar 08, 2007 7:38 pm 
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Location: toowoomba
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nice xr8ute. what else have u done with it in the meantime?

 

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Posted: Thu Mar 08, 2007 8:08 pm 
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xr8ute wrote:
Is it a 185, 200, or 220kw motor?

All the 185's need is a bigger cam...

cjh, you are confusing the E-Series V8 with the AU V8. AU is much better in all the areas you mention.


The AU 5.0 is not much better, like 185 Kw, has coil pack ignition, a slighlty bigger MAF sensor and similar, but so did the ED XR8 Sprint, and EB GT. My 88EA goes better than my mates AU I XR8. I don't know why.

 

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Posted: Thu Mar 08, 2007 8:13 pm 
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Power: 237 rwkw

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cjh wrote:
xr8ute wrote:
Is it a 185, 200, or 220kw motor?

All the 185's need is a bigger cam...

cjh, you are confusing the E-Series V8 with the AU V8. AU is much better in all the areas you mention.


The AU 5.0 is not much better, like 185 Kw, has coil pack ignition, a slighlty bigger MAF sensor and similar, but so did the ED XR8 Sprint, and EB GT. My 88EA goes better than my mates AU I XR8. I don't know why.

The major difference is in the heads and manifold.
Untouched E7TEs and HOs suck the balls.
Your 88EA would weigh alot less then an AUI XR8.
Don't let anyone t-bone you.

 

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Posted: Thu Mar 08, 2007 8:21 pm 
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Steady ED wrote:
cjh wrote:
xr8ute wrote:
Is it a 185, 200, or 220kw motor?

All the 185's need is a bigger cam...

cjh, you are confusing the E-Series V8 with the AU V8. AU is much better in all the areas you mention.


The AU 5.0 is not much better, like 185 Kw, has coil pack ignition, a slighlty bigger MAF sensor and similar, but so did the ED XR8 Sprint, and EB GT. My 88EA goes better than my mates AU I XR8. I don't know why.

The major difference is in the heads and manifold.
Untouched E7TEs and HOs suck the balls.
Your 88EA would weigh alot less then an AUI XR8.
Don't let anyone t-bone you.


Oh great, does that mean I need a rollcage now???? lol.

 

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Posted: Thu Mar 08, 2007 9:38 pm 
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gfanga wrote:
nice xr8ute. what else have u done with it in the meantime?

Pacey comp extractors and a 3" cat-back.
3.91:1 diff gears
Cut the front off the std airbox (no snorkel)
Electronic shiftkit

With that setup, my PB was 14.15 @ 98.68mph.

I've sinced lunched the motor with a broken valvespring. It will be back soon with GT40X heads, and a ported lower intake (std Explorer).

Following soon after will be a custom tune using the SCT/CAPA flash tuner.

Then soon after that...ex-CAPA Vortech S-Trim kit with ex-2003 Cobra 39lb/hr injectors and 90mm MAF.
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Posted: Thu Mar 08, 2007 9:44 pm 
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cjh wrote:
xr8ute wrote:
The AU 5.0 is not much better, like 185 Kw, has coil pack ignition, a slighlty bigger MAF sensor and similar, but so did the ED XR8 Sprint, and EB GT. My 88EA goes better than my mates AU I XR8. I don't know why.

AU is much heavier than an EA. Other than weight, the differences are;

GT40P's vs E7's
Explorer intake vs HO intake
65mm TB vs 58mm TB
70mm MAF vs 55mm MAF (thats a bit more than "slightly" bigger..lol)
24lb/hr injectors vs 19lb/hr injectors
reasonable 4-1 shorty headers vs tiny nasty crimped 4-1 headers
EDIS vs TFI dissy

The AU "Explorer"-spec windsor is a significantly better spec engine than the E-Series "HO" spec windsor.
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Posted: Fri Mar 09, 2007 8:37 pm 
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xr8ute wrote:
cjh wrote:
xr8ute wrote:
The AU 5.0 is not much better, like 185 Kw, has coil pack ignition, a slighlty bigger MAF sensor and similar, but so did the ED XR8 Sprint, and EB GT. My 88EA goes better than my mates AU I XR8. I don't know why.

AU is much heavier than an EA. Other than weight, the differences are;

GT40P's vs E7's
Explorer intake vs HO intake
65mm TB vs 58mm TB
70mm MAF vs 55mm MAF (thats a bit more than "slightly" bigger..lol)
24lb/hr injectors vs 19lb/hr injectors
reasonable 4-1 shorty headers vs tiny nasty crimped 4-1 headers
EDIS vs TFI dissy

The AU "Explorer"-spec windsor is a significantly better spec engine than the E-Series "HO" spec windsor.




That still doesn't explain it. Mine is stock, apart from the exhaust (homemade with 4488's ), homemade intake for the pod filter, 3.27:1 LSD, 5sp manual ( probably helps ) and in good tune.
The AU is a 12/99 XR8 sedan, adaptive shift auto, 3.45:1 LSD, has hotdogs instead of the original mufflers, but the exhaust is std otherwise, as is the intake side of it too.
Maybe my engine is really loose, heaps of K's on it????

 

 

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Posted: Sat Mar 10, 2007 2:01 am 
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cjh wrote:
That still doesn't explain it.

An AU1 XR8 is a mid-15s car.

A 5-speed manual MPFI EA is a mid-15s car.

You'd both have to take it to the track to find out what the real diference is.
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Posted: Sat Mar 10, 2007 12:38 pm 
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xr8ute wrote:
cjh wrote:
That still doesn't explain it.

An AU1 XR8 is a mid-15s car.

A 5-speed manual MPFI EA is a mid-15s car.

You'd both have to take it to the track to find out what the real diference is.


Don't worry, I plan to, just have to manufacture a tailshaft loop and fit it. They won't let you race a daily driven street car without one. Thats up here anyway, don't know about down south.

 

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