Custom manifold - loooooong runners!
#1
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I've come across a custom manifold ... Its interesting as it appears to have been made to quite a high standard. It has very long runners and an external wastegate, T25 flange ... well pics are probably more use right now, its just quite a bit different to anything I've seen before, anyone know what it is?
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97384-custom-manifold-loooooong-runners-10_zps75f529c0.jpg?dateline=1386962204)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97385-custom-manifold-loooooong-runners-9_zps259e9b3a.jpg?dateline=1386962204)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97386-custom-manifold-loooooong-runners-6_zps86ffd8ea.jpg?dateline=1386962204)
I'd just be intrigued to know if anyone recognises it or knows who made it?
Russell.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97384-custom-manifold-loooooong-runners-10_zps75f529c0.jpg?dateline=1386962204)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97385-custom-manifold-loooooong-runners-9_zps259e9b3a.jpg?dateline=1386962204)
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97386-custom-manifold-loooooong-runners-6_zps86ffd8ea.jpg?dateline=1386962204)
I'd just be intrigued to know if anyone recognises it or knows who made it?
Russell.
#3
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Its apparently been running a standard T25 turbo, about 210bhp at 10psi for just over a year but no details on if its been welded up.
Edit - I'm intrigued why you'd design it like that though. By the sound of things it was made by a specialist exhaust maker, I'm trying to find out who and what material etc.
Russell.
Edit - I'm intrigued why you'd design it like that though. By the sound of things it was made by a specialist exhaust maker, I'm trying to find out who and what material etc.
Russell.
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I was wondering about a brace, but I guess that could cause problems as well ... its mine if I want it (coming off a car thats being broken) so I might give it a go as I have everything else and all I need to find is a turbo
Russell.
Russell.
#7
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its a t25 flanged turbo. pairing doesn't matter to whoever said that.
Long runners like that will make a lot of power, but your spool will suck more.
I agree that the collector isn't that great.
Long runners like that will make a lot of power, but your spool will suck more.
I agree that the collector isn't that great.
#20
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No one here knows without looking at a dyno sheet.
Many F1 turbo headers had crazy combined collector angles. This gives greater area inside the collector, which has it's benefits.
Here is the RBR header, with around 90* combined angles.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97402-custom-manifold-loooooong-runners-exhaustf1.jpg?dateline=1386983207)
A turbo F1 engine with some crazy collector angles.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97403-custom-manifold-loooooong-runners-dsc03763.jpg?dateline=1386983207)
Dann
Many F1 turbo headers had crazy combined collector angles. This gives greater area inside the collector, which has it's benefits.
Here is the RBR header, with around 90* combined angles.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97402-custom-manifold-loooooong-runners-exhaustf1.jpg?dateline=1386983207)
A turbo F1 engine with some crazy collector angles.
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/97403-custom-manifold-loooooong-runners-dsc03763.jpg?dateline=1386983207)
Dann