Cobra.au Side Pipe Build

[Cobra.au]

Gav
A primary length of 36" (1m) seems the norm these days.

Mike
The main reason I am focused on flow through my system is once I pulley up my Vortech and find a few extra cubes I defiantly wont have problems getting air in and through the engine I want to be happy that it is not getting held up on the way out.

I will start making the jig for the merge collectors tomorrow so from this week on it will be full steam ahead

[Aussie Mike]

Fair enough, with that blower turned up you'll be pushing a lot of volume through. You'll need all the flow you can get.

Any idea if the metal cats run hotter or cooler than a conventional cat? You often see them without heat shields attached so I thought they might run cooler.

Cheers

[Aussie Mike]

I wana know how they weld up the inside of those merge collectors. They look like they are made from 4x 45degree bends that have been grafted together. I reckon there must be some tricky way they make them to get the insides so nice.

I did mine by welding up a steel pyramid shape into the merge section made from triangular sections of tube. I weld them together along their edges and then sharpen up the welded edge with a die grinder.



The pressed 3 1/2" collector tube then slips over the whole thing and gets welded in place. Not as pretty looking but a lot easier to make.



Keep us posted.

Cheers

[Dimi]

Hi guys
Don't mean to butt in but on this topic I just thought you might like to see the workmanship of the guys at Liverpool Exhausts who made up the exhaust system for my GT40.
Given the limited amount of room they had to work with they did a great job and made these to my exact specifications and requirements.

Full stainless steel and ceramic coated.

Dimi