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AU series 1 XR8 IRS custom exhaust advice 

 

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 Post subject: AU series 1 XR8 IRS custom exhaust advice
Posted: Tue Jul 19, 2016 2:57 pm 
Oompa Loompa
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Age: 26

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Ride: Falcon AU I XR8

Location: Wootton
NSW, Australia

I'm slowly improving my daily driver and ever since I bought it, I've been unimpressed by how it sounds.

Out of necessity, last year sometime, I replaced the stock 2 1/4" exhaust with a Redback 2 1/2" catback sports exhaust. Even though the resonator and muffler were essentially empty, they've gone and made the car even quieter!

What I'd like to do is, budget permitting, install a new set of catalytic converters and a twinpipe system. I can't find any information about the process though. Do I need two resonators, mufflers etc? Is a H crossover or an X crossover more beneficial? Ideal pipe diameter? Would shortening the pipe change anything? (if I decide to make side exhausts or something crazy like that)
Should I coat my existing 4-2-1 extractors in ceramic?
Aluminium, or stainless steel? (Does stainless weld? How do I weld aluminium?)

I know my way around a spanner, but thats about it.

Also, I'm looking for a throatier sound, not excessively louder. I don't think my neighbors would appreciate me waking them up at 5:00am to the equivalent of a Boeing 737.

 

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Owner of a 1992 EB Falcon, 2000 AU series II falcon and now a 1999 AU series I AU XR8

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 Post subject: Re: AU series 1 XR8 IRS custom exhaust advice
Posted: Wed Jul 20, 2016 9:56 pm 
Getting Side Ways
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Ride: AU2 XR8 ute & 91 EA bitsa

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VIC, Australia

CRL13X wrote:
What I'd like to do is, budget permitting, install a new set of catalytic converters and a twinpipe system. I can't find any information about the process though. Do I need two resonators, mufflers etc? Is a H crossover or an X crossover more beneficial? Ideal pipe diameter? Would shortening the pipe change anything? (if I decide to make side exhausts or something crazy like that)
Should I coat my existing 4-2-1 extractors in ceramic?

I've read a few good comments about this system:

http://www.ebay.com.au/itm/Ford-AU-XR8- ... qBILSsoUiQ

https://www.youtube.com/watch?v=xlVPt0UXQ7I

With regard to the extractors, a set of Pacemakers will let the engine breath better along with some hi-flow cats. I bought a set of Hurricane Headers and got them ceramic coated inside and out for $350. The ceramic coating is more durable than paint, reduces heat in the engine bay and doesn't allow rust spots to form (unless it gets chipped).

 

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AU2 XR8 with Raptor VL, ported Yella Terra GT40P heads, Scorpion 1.6 RRs, XE264HR-14 Comp Cam, ceramic coated Hurricane Headers, 60lb injectors, Walbro 255, 200cfi cats, 3" exhaust & Snow Performance water methanol injection

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 Post subject: Re: AU series 1 XR8 IRS custom exhaust advice
Posted: Thu Jul 21, 2016 10:43 am 
Oompa Loompa
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Age: 26

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Ride: Falcon AU I XR8

Location: Wootton
NSW, Australia

Thanks for the links!

Its not exactly what I was looking at (I'm interested in creating the system myself, or as much as I can) but its perfect for what I wanted to know.

I keep forgetting youtube and ebay make excellent resources for information.
This 'project' won't be happening until at least December, but this will definitely be a big help in preparing.


E: After more research, I may be able to get away with just a muffler delete. It seems to be my biggest restriction.

 

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 Post subject: Re: AU series 1 XR8 IRS custom exhaust advice
Posted: Sun Jul 24, 2016 11:38 pm 
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Have you got the gear for making your own?
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 Post subject: Re: AU series 1 XR8 IRS custom exhaust advice
Posted: Sun Jul 24, 2016 11:44 pm 
EFI Guru
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 Post subject: Re: AU series 1 XR8 IRS custom exhaust advice
Posted: Tue Jul 26, 2016 9:51 am 
Oompa Loompa
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Age: 26

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Ride: Falcon AU I XR8

Location: Wootton
NSW, Australia

XR9UTE wrote:
Have you got the gear for making your own?

No, but the workshop where I work does and my boss lets me use anything within reason.

Thanks for the link by the way, I couldn't find any other threads - too many results in different threads.

 

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 Post subject: Re: AU series 1 XR8 IRS custom exhaust advice
Posted: Tue Jul 26, 2016 10:35 am 
EFI Guru
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Ride: 351 Vogue,XH 5.0,'17 5.0 Stang

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WA, Australia

No worries. I've got my own TIG and I really enjoy making my own exhaust. I use 304 because I don't see the point of using steel when you put all that work into it. I'm
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