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DIY custom exhaust manifold
DIY custom exhaust manifold
Currently building a custom low mount exhaust manifold with external wastegate for someone on the forum... just some pic's to start it off and once finished ill do a write up and show the final product , all done with a stick welder which im un happy about, cause i was gonna tig it up but my tig gun hasent arrived yet ![Sad :(](./images/smilies/icon_sad.gif)
![Sad :(](./images/smilies/icon_sad.gif)
finished
all it needs now is a sand blast and some paint
it has perfect clearance from everything, its an awsome fit
![Very Happy :D](./images/smilies/icon_biggrin.gif)
![Very Happy :D](./images/smilies/icon_biggrin.gif)
red top GTI-R sr20det powered ET pulsar, nistune daughter board, z32 afm, 660cc injectors, garrett gt2876r, e-boost 2, 3inch exhaust system, custom exhaust manifold, 38mm external waste gate, 6 speed vlsd gearbox
samoan work boots lol.... cheers dude, anyone want a manifold made up??sgs wrote:Dude that is f**king cool, looks like a rams head or something![]()
Also love the samoan work boots in pic 17 lol
![Very Happy :D](./images/smilies/icon_biggrin.gif)
red top GTI-R sr20det powered ET pulsar, nistune daughter board, z32 afm, 660cc injectors, garrett gt2876r, e-boost 2, 3inch exhaust system, custom exhaust manifold, 38mm external waste gate, 6 speed vlsd gearbox
cheers mateKimmo wrote:Nice work. How much are you asking?
![Very Happy :D](./images/smilies/icon_biggrin.gif)
cheers
red top GTI-R sr20det powered ET pulsar, nistune daughter board, z32 afm, 660cc injectors, garrett gt2876r, e-boost 2, 3inch exhaust system, custom exhaust manifold, 38mm external waste gate, 6 speed vlsd gearbox
- EXAMADNESS
- Posts: 530
- Joined: Thu Oct 15, 2009 6:37 am
- Location: South Africa
Manifold looks awsome. nice work ![Wink :wink:](./images/smilies/icon_wink.gif)
![Wink :wink:](./images/smilies/icon_wink.gif)
Mazda FE powered 2.0 16v N12 exa : http://forum.n12turbo.com/viewtopic.php?t=6592
Mazda 2.5 v6 KLDE into Nissan Exa "project" : http://forum.n12turbo.com/viewtopic.php?t=7442
Mazda 2.5 v6 KLDE into Nissan Exa "project" : http://forum.n12turbo.com/viewtopic.php?t=7442
hey jay, 3mm thickjapcrap wrote:how thick are the steam pipes are you using? im quite keen on your work man
red top GTI-R sr20det powered ET pulsar, nistune daughter board, z32 afm, 660cc injectors, garrett gt2876r, e-boost 2, 3inch exhaust system, custom exhaust manifold, 38mm external waste gate, 6 speed vlsd gearbox
I'm gonna bear that in mind. Mine cost $700, and it's shit.PAC_ET wrote:cheers mateKimmo wrote:Nice work. How much are you asking?$350 will cover it, i can make any style you want
cheers
...Just had a thought about a possible technique to get a smoother transition in the collector.
If you have an oxy, you could leave more than a quarter of the tube on the small end, then heat it up and bash it flatter so it still only goes through 90°, but at a larger diameter.
Then when you join the four of them, the taper would be shallower for a given length and this end would be larger. Also, the internal ribs formed by the meeting tubes wouldn't be as deep.
Just an idle notion... dunno if it's a good idea or not
- tassuperkart
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Its not that critical M8.
Particularly on a turbo manifold. The diameter of that merged end is nothing more than what has to line up with the turbo flange.
Your never going to see more than one actual pulse traveling thru it at any one time so its never going to be any restriction anyway..
Its been well documented the gains to be had by actually necking the collector diameter down just beyond the merge and then opening it back out again to the finished collector diameter in atmo extractor systems.
The dimensions of the piping on a top end header system is a sum of the engine capacity, bore and stroke, the cam timing, port diameters, predicted max RPM and predicted torque peak, header pipe length and a host of other parameters.
The whole show is then varied again by projected EGT's.
Its a black art akin to designing a well running expansion chamber for a 2 stroke.
All the theory in the world will not guarantee a good result.
When the manifold is put under pressure, all that beautiful theory goes well out the window and remarkably high numbers can be had with a simple log style manifold. In fact very difficult to top even with a carefully designed and tuned extractor system.
L8r
E
Particularly on a turbo manifold. The diameter of that merged end is nothing more than what has to line up with the turbo flange.
Your never going to see more than one actual pulse traveling thru it at any one time so its never going to be any restriction anyway..
Its been well documented the gains to be had by actually necking the collector diameter down just beyond the merge and then opening it back out again to the finished collector diameter in atmo extractor systems.
The dimensions of the piping on a top end header system is a sum of the engine capacity, bore and stroke, the cam timing, port diameters, predicted max RPM and predicted torque peak, header pipe length and a host of other parameters.
The whole show is then varied again by projected EGT's.
Its a black art akin to designing a well running expansion chamber for a 2 stroke.
All the theory in the world will not guarantee a good result.
When the manifold is put under pressure, all that beautiful theory goes well out the window and remarkably high numbers can be had with a simple log style manifold. In fact very difficult to top even with a carefully designed and tuned extractor system.
L8r
E
Forcd4 wrote:Oh fuk no dude it's you a again, the oracle.