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Working Side Pipes

 
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Lynmac
Guest





Posted: Tue May 11, 2021 12:03 am    Post subject: Working Side Pipes

Hello

First post in here..........but been reading for awhile.
My question is where can I get a set of "working" side pipes from: either off the shelf or custom made? Would like to fit them after we get through registration.

Building up an AC Cobra
Location: Adelaide

Regards
Lyn M
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boxhead
Rookie


Joined: 12 Apr 2021
Posts: 11
Location: Alice Springs

Posted: Fri May 14, 2021 3:10 pm    Post subject: Side pipes

Hey there Lyn, this is my first post too.
If you arent willing to have a go at the side pipes yourself then possably the States may be your only answer.
With any side pipes you are going to be struggleing to make them legal for rego purposes.
Another option may be to phone afew of the Australian kit suppliers and see if they can sell you a set, most suppliers do sell them but never intended to be used (legally)
Yet another choice may be to talk to Aussie Mike of on the Cobra site, he has built some very nice pipes (I have seen them) I know he is busy but he maybe able to make some or send you some plans and scetches so you could make them or have them made.
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Building a Cobra replica with LS1 engine T56 gearbox Jag front suspension & AU irs falcon XR6 rear
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Brootal
1000RPM



Joined: 11 Jun 2021
Posts: 1154
Location: Sydney, Australia

Posted: Fri May 14, 2021 3:26 pm    Post subject:

I don't see whey they should be a problem with rego. Provided they exit beyond the last door opening (which they should) and are muffled sufficiently to meet relevant noise restrictions, you should be able to run them.

Aren't there already Cobras running around with them? Dodge Vipers run them and they were factory options on Corvettes etc weren't they?
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Guest






Posted: Fri May 14, 2021 9:24 pm    Post subject:

Brootal, the law says that they must be less than 92 Db and meet current emission standards, so they need cats in them, also they need a large heat shield (looks ugly) and cannot point toward the footpath.
Most people get there vin # then fit pipes without cats and pointing out the sides.
You can buy or make a spiral configuration that supposedly works ok to make them quieter, also another choice is to make an inner pipe with alot of holes and wrap steel wool or fibreglass (as used in bikes) around the perforated tube then have the outer case over the top of this.
The second choice is how Aussie Mike is doing his Lynmac.
Stainless steel swarff from a machine shop may be the best choice of wrapping as it will not burn out as easily as the steel wool or fibreglass.
Ps I dont profess to haveing a vast knowledge in this field, it is all stuff I have learnt from watching others
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boxhead
Rookie


Joined: 12 Apr 2021
Posts: 11
Location: Alice Springs

Posted: Fri May 14, 2021 9:55 pm    Post subject:

That was me incase you didnt realise, I thought I had set it to remember me
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Brootal
1000RPM



Joined: 11 Jun 2021
Posts: 1154
Location: Sydney, Australia

Posted: Sat May 15, 2021 3:43 pm    Post subject:

boxhead wrote:
Most people get there vin # then fit pipes without cats and pointing out the sides.


Don't want to sound like a goody two shoes, but doing stuff like that can really stuff it up for everyone else. Surely with modern exhaust technology you could do all sorts of clever things like turn the whole sidepipe into a muffler by having chambers built into it or something. Must be a way.

In regards to pointing towards the footpath, you may be able to get away with it if they are turned downwards slightly. Just a thought.
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spark
Cruisin



Joined: 13 Jun 2021
Posts: 312
Location: Lakes Entrance Victoria, Australia

Posted: Sat May 15, 2021 4:26 pm    Post subject:

How about slipping a “Smithy’s” muffler inside a 80mm pipe- bend one end towards the headers and the other downward, get the pipes coated with jet hot ceramic coating.

As far a catalytic converter goes, doesn’t it depend on what year motor is used?

I have been thinking of ways to fit side pipes on my 31 pickup, that’s were I came up the Smithy,s idea, also thought of stainless pipe with stainless pressed mesh, packed with f/glass or stainless wool packing for a baffle.

Others have suggested using motorcycle baffles in a pipe.

At the moment I plan to run the diver’s side pipe under the sump to connect to the passenger side pipe, a “Y” to a single muffler and 1 tail pipe to the rear.

The side pipes would be fitted some time after rego, how ever if I can not come up with a side pipe setup that is legal, they will be dummy lake pipes.

I may get some old tail shafts from the wreakers and make up the pipes, trying some of the above ideas, before spending on stainless or jet hot.
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Jimmy B
Cruisin



Joined: 01 Feb 2021
Posts: 339
Location: Tweed Valley, NSW, Australia

Posted: Sat May 15, 2021 5:31 pm    Post subject:

I'm using a Model A torque tube that I bought at a garage sale. I'll be running it from under the engine bay to under the left side of the chassis and exit just forward of the LHR tyre. I was thinking of drilling a piece of pipe and filling it with steel wool to baffle the noise and I can unbolt six bolts and I will have a full open exhaust!
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spark
Cruisin



Joined: 13 Jun 2021
Posts: 312
Location: Lakes Entrance Victoria, Australia

Posted: Sat May 15, 2021 6:17 pm    Post subject:

I was thinking of having the sound deading- glass or stainless wool on the out side of the mesh so the centre is a flow through setup.

Have seen a pipe drilled with holes that have been punched inward to disturb the gas flow, two plates are fitted to each end of the pipe (baffle), to force the gases through the centre.

The Smithy’s come in different lengths (2 or 3 sizes, I’m not sure), probably find one fits inside a torque tube, just have to come up way of keeping it in.

Chopper sells them, if you on chopper how big are the Smithy’s – Length and Diameter?
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JIMBOB
Cruisin



Joined: 11 May 2021
Posts: 322
Location: Canberra

Posted: Sat May 15, 2021 6:44 pm    Post subject: Working Side Pipes

I'm running side pipes on my bucket, as far as I know they are repro corvette Items with a muffler/hotdog insie. The just clamp on to the end of the header pipe and I made brackets to secuere them. Bought them thru Ra y at Junkyard Classics, only bout $200 from memory.

Cheers and beers
Jimbob
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boxhead
Rookie


Joined: 12 Apr 2021
Posts: 11
Location: Alice Springs

Posted: Sun May 16, 2021 9:10 pm    Post subject:

Building a Cobra it has to be registered as an ICV so it must meet the current ADR's, there fore the cats are required. I am not saying it cant be done, just that it may be very hard.
I dont know how to add pics to the posts so here is a link to a gallery with the pipes I am talking about, modt pics are on page 3
http://www.clubcobra.com/photopost/showgallery.php?cat=500&ppuser;=11409
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gregwapling
Site Admin


Joined: 10 Jun 2021
Posts: 412
Location: Melbourne, Australia

Posted: Mon May 17, 2021 9:15 am    Post subject:

Saw there advertised at Cobra Accessories


Here's another couple of options at StainlessWorks


G-Force Sports Cars AU
Side Pipes - Including CATS - (2). $2420.00

Harrison Cobra Kits AU
Sidepipes
2" Primary Pipes & Swedged collector - for that original look unchromed $ 755.00
2" Primary Pipes & Swedged collector - in Stainless Steel $1,600.00


Lastly have you contacted the The Australian Cobra Car Club
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Greg Wapling
The years have been kind to me, it's just the weekends that have done the damage.
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dunbar_58
Newbie



Joined: 08 May 2021
Posts: 9
Location: Sunnybank, Brisbane

Posted: Wed Jun 02, 2021 1:52 pm    Post subject:

For what its worth, should you modify a car in Qld (and probably applies to other States as well) that is not legal (you changed it after gaining compliance) and you were to crash into another car, your vehicle is demed to be in viloation of the law and as such most likely to be classed as uninsured. Now that means that if you hit someone like me who knows the law in this area (I used to be the prosecutions clerk for Qld Transport's Vehicle Modification Section), I will sue you and more than likely I will end up owning your nice (but slightly dented) Cobra (after you have to sell it to pay me out!). Be very aware of what your legal liabilities are if you decide to try and beat the law!
If however you own a car such as the older Corvettes or a real Cobra, you can register it with all or any FACTORY accessories. I know it sounds stupid (and is) but thats the law. In my case, my modified 1960 MG has a perspex windscreen fitted, simply because it was a factory option and therefore legal in Qld. You want to change the law, hassle the politicians. There are several glaring issues I can see which could be used to pressure the Federal and State politicians to bend the rules our way IF we were to unite and decided to publicise them. The Politicians would not be willing to enforce these ADRs as it would lose them votes.
regards
mark
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old32
500RPM



Joined: 05 Mar 2021
Posts: 519
Location: at work in Melbourne

Posted: Wed Jun 02, 2021 3:52 pm    Post subject:

Just a lillte thought for all who want to run "live" lake pipes.
At last years Burnham Beeches run a nice red Cobra turned up, the owner got out and turned around, bent over to get something out of the car and woops, one pair of pants (must have been nylon) melted against his legs. Lucky man, only burnt pride, dacks and a singe to his legs hairs.
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