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My XR8 sounds like a six! Can you help? 

 

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 Post subject: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 1:03 pm 
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Ride: AUII XR8 Ute

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Hello there, I have just purchased a manual AUII XR8 ute with the 200kw motor, it has the factory? 4-1 headers, factory intake and a cat back 'sports' exhaust that goes from twin 2.5 inchers to a single 3 inch pipe with one muffler and one resonator.

It sounds great when you give it stick, but at low revs or light throttle, it sounds like a boomy six.

Think XR6 with extractors or even, dare I say it, an ECOTEC V6 with a big bore!

There is NO nice noise at all from up front.

I want to know what the best course of action is, I just want a sweet sounding V8 burble when cruising, as I don't want to have to cane it all the time just to please my ears!

The worst, most disgusting fact about this is that a neighbour has a GenIII ute with a single pipe and it sounds 'proper' when he burbles past every day... It's killing me!

I want to start with an Air Induction kit of some sort, but I'm not sure which gives the best sound?

Then, do I need a full twin system or will Pacemakers be a better bet? Or do I really really need both?

My final consideration was to just take it Herrods, but I want to do it step by step, and perferrably not spending too much of my hard earned...

Any advice from someone that has experience in these sorts of things would be awesome...

Thanks heaps!
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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 1:40 pm 
Getting Side Ways
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Get rid of the resonator, my S1 XR8 has the same setup as yours without the resonator and it idles and sounds like an 8 should

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 1:51 pm 
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Location: Melbourne
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Oh wow, I can't believe how simple and cheap that will be! Awesome, you've made my day. I'll get it done ASAP and post again with the results...

Have you tried any induction kits?
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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 4:26 pm 
Getting Side Ways
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A set of extractors will make it sound much more crisp, wont sound as muffled.

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 4:50 pm 
Getting Side Ways
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Don't waste your money on a CAI, look at what others have done themselves for ideas.

The $300 odd some companies charge for CAI is almost half a set of pacemakers! And makes s**t all difference from what you can do yourself.

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 7:12 pm 
Getting Side Ways
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Easy solution,cut the tailpipe off and dump the exhaust from the rear of the twin mufflers (as you mentioned it had a twin system merging into a single 3inch.This would sound heaps better and go better too.Also keep the tailpipe sitting there to keep the boys in blue happy.lol

If you like it this way,just weld some flanges onto the rear of the mufflers and the tailpipe so you can un bolt and bolt up your little dump pipes to the mufflers and visa versa.

 

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Last edited by KRUPTD on Thu Feb 05, 2009 7:15 pm, edited 1 time in total.

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 7:13 pm 
Getting Side Ways
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If you want it sound alittle more KRANKY,just remove the balance section of the exhaust so you have 2 seperate systems one on the left and one on the right if you know what i mean.

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 9:10 pm 
Getting Side Ways
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Extactors and from muffler to rear of car run the biggest pipe you can..
Usaally 3". This will give some note, even with std muffler fitted..
As said remove rear resonator...

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Thu Feb 05, 2009 11:50 pm 
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cammmmmshaft!!!

or, 3 inch system with highflow middle muffler and hot dog on the tail pipe. To go even further, add pacemaker extractors and highflow cats to get it even more beefy/tougher.
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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Fri Feb 06, 2009 10:52 am 
Getting Side Ways
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EB-5LTR wrote:
cammmmmshaft!!!

or, 3 inch system with highflow middle muffler and hot dog on the tail pipe. To go even further, add pacemaker extractors and highflow cats to get it even more beefy/tougher.


he has the 3" setup with a muffler and hotdog, removing the hotdog/resonator *should* make it shound right

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Fri Feb 06, 2009 5:42 pm 
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Stock extractors!? Definitely they are what is holding the great sound back. When I did my exhaust, I did cats back first. Sounded good but until I got the extractors did I realise that the stock headers make it sound like a vacuum cleaner.

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Fri Feb 06, 2009 11:02 pm 
Getting Side Ways
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Ride: 1993 EB XR8

Location: BrisVegas
QLD, Australia

The stock AU headers are *alright* for stock and dont hinder noise too bad, i'll post a pic of my Exhaust tomorrow as its going to be out of the car tomorrow so i'll grab a pic for ya

 

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ILL60 - EF XR8, Sunroof, Ticky Kit, 19x8.5/19x11 TE37's, 347, AFr185's, TFS BoxRcustom converter, Hurst Quarterstick, huge billet cam.

51TER - DL LTD. Stock.

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Sun Feb 08, 2009 11:45 pm 
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bash out cats

then if still not happy

dump it at the headers lol, will make it sound like a doorslammer

 

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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Mon Feb 09, 2009 11:55 am 
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Ride: AUII XR8 Ute

Location: Melbourne
VIC, Australia

The stock extractors on the 200kw engine actually look reasonably decent, I'm gonna start with removing the resonator and see how it sounds. If it's all good out back then I'll be looking at CAI's to get a bit more noise up front. Jury's still out on which one to go for tho. Might engage Mr Herrod on that one...

Thanks for you help - will report back on this issue!
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 Post subject: Re: My XR8 sounds like a six! Can you help?
Posted: Wed Feb 11, 2009 7:00 am 
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Go for headers mate.

I bought my AU3 with twin 2 1/2's with 2 sets of hotdogs and it sounded nice when cruising but once I put headers on it boy did it sound different! Alot of people thought I chucked in a cam :lol:

 

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