CR Sidepipes

Gav · #1 (**permalink**) 04-26-2006, 04:38 AM

I have started on my sidepipes and thought I would post a couple of pics.

I have used a 3" collector with a 4"-3" reducer that has been cut down, same with the outlet end but have used a 3" bend for the tip.

Both the front and back assemblys have a sleeve welded in from the inside to locate the outer 4" section of the pipes, these will be attached with socket head cap screws around each join.

I have located 4" cats which will sit in the 4" pipe and the remaining will be a home made hotdog muffler.
Expanded metal mesh rolled into a 3" pipe will go up the centre and as you can see in the pics on my gallery ceramic fibre wool will be wrapped around it.

The wool is used for boiler refractories and the like and is great stuff its not even itchy if you get it on your skin. You can hold an oxy torch to one side and your hand to the other, so hopfully the outer of my pipes will not get too hot.

The wool is not that dear either, enough for a set of pipes would only be worth about $20. I buy it by the roll so if anyone wants some give me a ring on 0407 110641.

I had thought about sandwiching it between a sheet of ally or stainless over my pedal boxs to keep out the heat

Gav

Tenrocca · #2 (**permalink**) 04-26-2006, 05:06 PM

Looks great!!!That is one long pipe there Gav......

Sidepipes is one thing Im very keen to have a go at, but I really only have a vague idea how they all come together (despite studying yours and uncle Mikes posts al length!!). Have either of you guys actually made up drawings\measurements\material lists (ie instructions

)?

Cheers

pneall · #3 (**permalink**) 04-26-2006, 05:33 PM

Tenrocca,

Mine are off the car at the moment if you want you can come over , pull them apart and measure . I would do a few things different second time round.You could even get the guy who built mine to copy the headers section if you like as they are off too.

ring me on 8824 1030 if you want to arrange.

Regards,

Phil

Aussie Mike · #4 (**permalink**) 04-26-2006, 05:47 PM

Looking realy good Gav,

Who made those cleanly formed collectors? The ones I get need a heap of panel beating before they look any good.

You can also buy 3" perforated tube for the cores. It might be easier than rolling a section up.

Cheers

Aussie Mike · #5 (**permalink**) 04-26-2006, 05:48 PM

Phil's Cobra has caught a cold. You might hear it sneezing at the next track day outing.

Shelby400 · #6 (**permalink**) 04-26-2006, 06:20 PM

Phil,

Your not are you?

Tenrocca · #7 (**permalink**) 04-26-2006, 05:45 PM

Thanks Phil, I may well take you up in that next week. Ill give you a call.

So if they are all off, whats going on with the "as featured on the Classic Revical web site" machine?? Spending more money to gain those magical tenths of a second?

Mando · #8 (**permalink**) 04-26-2006, 08:38 PM

Hi Gavin, pipes are looking good. The guys are right those collectors look pretty sharp. Itll be great to see some pictures as you go along.

Regards.

Churchy · #9 (**permalink**) 04-26-2006, 09:41 PM

Gav,

Yep, they are lookin real good

Phil,

I am also intending on making my own sidepipes, and headers

and would love to have a sticky beak as well if I could.

Seeing as there has been little progress on the build lately, I may as well discover a few more black arts that are going to confuse the Cr4p out of me.

Gav · #10 (**permalink**) 04-27-2006, 04:26 AM

Thanks everyone,
Its amazing what you can do flying by the seat of your pants!
I think you will find the camera has been kind to the collectors they're OK but I'm not going to write home to mum about them.
As for the long side pipe, I'm building a limo!!!!
All my bits where bought from a local muffler shop and and came from Pacemaker I think?
The expanded mesh I'm using is in the shed and I'm too tight to buy some perforated pipe until I know whether these will sound OK.
Do you like the black case paint to hide, sorry enhance my tig welding?

Gav

LoBelly · #11 (**permalink**) 04-29-2006, 12:40 AM

Gotta love the black paint - makes eveything so uniform.

Just like it was meant to be - my fabricated bits are well doused in the magic black spray.

LoBelly

stuartt · #12 (**permalink**) 04-29-2006, 01:32 AM

Gav, are the pipes stainless, any idea on the end cost of parts?

Gav · #13 (**permalink**) 04-29-2006, 04:09 AM

I had toyed with the idea of stainless but could not be bothered with the welding. The pipes you are welding together require to be filled tig gas whilst welding in order to get a reasonable joint with no leaks or porosity.
To be honest I just can't be fagged and the coatings available for pipes now are great.
All up I have bought 20 small radius bends, 4 large bends, two flange plates for the heads, 2 colectors, 4 reducers, 2 3" bends for the tips, 2 3m lengths of 1 3/4" pipe and 1 3m length of 4" pipe.
All up it has set me back around $800 bucks.
The four larger radius bends are the killer as I was charged for a die change for their bender.
I was going to tig every join but will probably just use the mig in the engine bay and linish the welds.

Gav

justbetter · #14 (**permalink**) 04-29-2006, 05:30 AM

Guys,
Im gunna have to post here, i had a coppied version of ( work on the car when i've finished everone elses stuff, and then dreaming of future stuff for mine ) Mikes side pipes and they are not quiet enough to get the reg process. So the suggestion is to have a $hit house looking under body kit to get passed then throw on the live side pipes, i've tried a couple of versions now and run cats and mufler in the tube at the required length, and with out extending the length up like a truck stack some 1.8m high, doubt i can get any quieter.
Ah but i like it loud and have the 4 RTA slips to prove it with fines and mods last year costing over 4 k even now its quieter but not legal, sorry for the news. But have been busting for Mike to fire his magic motor up.

Beejay · #15 (**permalink**) 04-29-2006, 07:23 AM

I think the days of trying to comply with noise regs on a modified car are over. There is a Classic Revival just completed in Sydney that had the legal system on at the last club meet. No one could believe how quiet it was. It sounded like a Corolla! To achieve the 100mm ground clearance the muffler was inside the rear wheel arch, and 15" x 7" wheels fitted.....

I am going to have manifolds made up to suit my live side pipes, but with a lower flange blanked off. For rego the side pipes will be blanked off and an underbody exhaust hooked up. At least this way the engineers certificate will show the side pipes fitted.

One of the reasons that I decided to build a Cobra is that if you are going to build a weekend car, it may as well be as grumpy, impractical, noisy, thirsty and have no roof.

Ben (wishing his car was ready to drive)

Cameron Parsons · #16 (**permalink**) 05-01-2006, 03:14 PM

Garrett,

my ears are still ringing from the test drive at Winton, and I think the mic on my video is shattered...... not quiet enough for rego.... geeze, not quiet enough for War Games

Cameron

justbetter · #17 (**permalink**) 05-01-2006, 03:20 PM

" What ya say Cameron " speak up

NASSTY · #18 (**permalink**) 05-04-2006, 01:16 AM

Quote:

Originally Posted by justbetter

Guys,
Im gunna have to post here, i had a coppied version of ( work on the car when i've finished everone elses stuff, and then dreaming of future stuff for mine ) Mikes side pipes and they are not quiet enough to get the reg process. So the suggestion is to have a $hit house looking under body kit to get passed then throw on the live side pipes, i've tried a couple of versions now and run cats and mufler in the tube at the required length, and with out extending the length up like a truck stack some 1.8m high, doubt i can get any quieter.
Ah but i like it loud and have the 4 RTA slips to prove it with fines and mods last year costing over 4 k even now its quieter but not legal, sorry for the news. But have been busting for Mike to fire his magic motor up.

4 slips and 4k....

Not trying to be too pessimistic but I can see a potential problem if lots of people have loud side pipes or obvious mods for that matter. If some sh!thead from the RTA gets wind of all these loud, smelly & fast cobras then we could all be stuffed. Just ask 750HP (Craig)

It would be concerning if a few cobras got pulled up enough times to make somebody take a closer look at the cobra scene. All it takes is one RTA moron to come along to a meeting, take down a few number plates (or even just vet the RTA database) and bingo – audit notices are in the mail.

I’m all for having fun but I think when it comes to modding cobras, and lets face it, there are more than quite a few that are, I think we need to think globally instead of how deep our own pockets are.

I can think of no more obvious illegal mod than working sidepipes. There are more subtle ways to get HP.

spookypt · #19 (**permalink**) 05-04-2006, 01:39 AM

Nassty, I hear what you're saying but if we are all encouraged to think on a global front wouldn't we be better off lobbying the powers that be to allow working SP's??? By this I mean if the HOT ROD fraternity can get their working side pipes plus a host of other "legal mods" OK'd, then why can't we.

It seems crazy as hot rods are all one offs. A modded cut and shut illegal derivitive of a once legal street car. None were ever homologenised in their respective HOT ROD form. In fact the truth be known they were illegal when these guys modded their cars 30 years ago!

My way of thinking is that at least Cobras were a real production run and all we're doing is trying to recreate what actually was???

This is off thread/topic I know, but I for one will be running working side pipes and will also prepared the results. I guess if you know what you create is illegal according to the ADR rules then you can't complain when you get pinged!

Nassty, sadly you're so right though... it only takes one inspector to create havoc for many!

Just my 2cents worth.

Spookypt

NASSTY · #20 (**permalink**) 05-04-2006, 01:57 AM

Quote:

Originally Posted by spookypt

Nassty, I hear what you're saying but if we are all encouraged to think on a global front wouldn't we be better off lobbying the powers that be to allow working SP's??? By this I mean if the HOT ROD fraternity can get their working side pipes plus a host of other "legal mods" OK'd, then why can't we.

It seems crazy as hot rods are all one offs. A modded cut and shut illegal derivitive of a once legal street car. None were ever homologenised in their respective HOT ROD form. In fact the truth be known they were illegal when these guys modded their cars 30 years ago!

My way of thinking is that at least Cobras were a real production run and all we're doing is trying to recreate what actually was???

This is off thread/topic I know, but I for one will be running working side pipes and will also prepared the results. I guess if you know what you create is illegal according to the ADR rules then you can't complain when you get pinged!

Nassty, sadly you're so right though... it only takes one inspector to create havoc for many!

Just my 2cents worth.

Spookypt

I agree with you too Spookypt re lobbying. That's been discussed many times. ATM though, changing the regs in the near future doesn't appear to be likely so we all have to make do with the current regs.

I'm not saying that modding is bad. All I'm saying is I think it would be better for cobras to be more subtle about their mods so as to not attract undue attention from the boys in blue. Loud doesn't necessarily equal fast. 400TT proved that at Shelby Fest 06. He was the quietest cobra there yet he was also the quickest.