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post #1 of 8 (permalink) Old 04-09-02, 08:49 AM Thread Starter
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AUII XR8 Mod's

Ok guys & gals. New one to the forum here.
I am in the process of updating my older (93) 4 litre falcon, and purchasing a AU II XR8 !!!! *hell psyced* And need some advice.
(so i can kick some more holdens butts :) )
Just wanna know what your opinions on whether to have the twin exhaust or a single 3" exhaust, or to the likes.
What have you's got ?
And also, Chips ! What are your opinions, UNI CHIP,POWERCHIP ?
Hope to hear from ya's !
Rock On !!!!!
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post #2 of 8 (permalink) Old 04-09-02, 09:05 AM
Bring Back the 24hr!!!
 
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Welcome to the boards, good to see you made it on after the initial signup problems.
For exhausts the question has been raised many a time in here for the AU Versions of the XR8 so i will do a search and see what threads i can find for you on the topic.

As for chips, in my opinion it isn't really worth doing until you have done a few different engine mods like cam, intake, exhause etc. before it will makr any real difference, but if you do do it, got for a unichip as in my opinion powerchips are a waste of time and money.

Will go and search for some threads now
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post #3 of 8 (permalink) Old 04-09-02, 09:18 AM
Bring Back the 24hr!!!
 
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Here is a thread that talks of exhaust mods to the XR8, there are others, I can't find them at the moment though,

http://discussions.fordforums.com/sh...hlight=exhaust
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post #4 of 8 (permalink) Old 04-09-02, 07:19 PM
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Easy answers:

Exhaust
For a mildy modified car, single 2.5 inch mandrel is the go for power and torque. As you go for more mods though, a twin system will sound better. X-pipe is a good thing. Headers will make a substantial difference as well.

Chips
I can only say that a custom programmed chip is the way to go. Unichip works very well on the XR8. That's my recommendation having fitted one to mine.

Other mods
If your car is a 200, camshaft is a major issue. Send it on its way! 220 is better, however you will still find substantial gains in changing your camshaft.

So, my advice on order of priority is exhaust includinmg headers, unischip, then camshaft. Which basically follows what most tuners are offering in their packages.

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post #5 of 8 (permalink) Old 04-10-02, 01:38 AM
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Hello Pete,
Can you give any further advice on changing the cam on the 200.
What cam would you recommend ?
The std 220 XR8 cam or a after market cam.

What is your concerns about the 200 cam?
Is it a straight swap or would you need the heads to be done as well.

Thanks.
Steve.

EL2XR8
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post #6 of 8 (permalink) Old 04-10-02, 01:51 AM
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I've had two '200kw' AUIIs (autos) and now have 220kw. The difference is astounding. I wouldn't even consider a 200kw now. Valves were done as well as cam for 220. Bigger throttle body too. Other changes? Not really much I don't think. With the Herrod headers, exhaust, GT40 upper manifold, Herrod intake tube, lowered springs and Herrod modified Konis (they revalved them) the 220 goes extremely well. I think I could even get a speeding fine as large as one could get with even a T3! (may not get there as fast, but would cost the same).

AUIII XR8, Manual. Herrod Motorsport bits
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post #7 of 8 (permalink) Old 04-10-02, 04:55 AM
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dont put the 220 cam in place of the 200 cam your car will go backwards.the 200 cam is a bigger cam than the 220

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post #8 of 8 (permalink) Old 04-10-02, 05:37 PM
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Herrods have some Crow cams which have been proven to work well. It's all a matter of matching your cam to the rest of the engine. I had a Crow cam fitted to my car and it was undriveable (manual) in traffic. Pigrooting around, bunny hopping. And it didn't go! Hence it was just a bad combo.

I now have a Trickflow (Crane) camshaft which is a good match for my engine. I say seek advice and let your engine builder spec the cam. From my experience, if you stick to a known formula, going to Herrods will not be a mistake. Buy a package deal and know you're getting what you paid for!

As for the 200 cam being bigger than the 220, from the specs I have the advertised duration is larger on 220, however maybe lift and 0.050 duration make the difference here. Rob, can you list the specs to show us what you mean?

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