Custom manifold - loooooong runners!
 

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/attachmen...ine=1386962204

https://www.miataturbo.net/attachmen...ine=1386962204

https://www.miataturbo.net/attachmen...ine=1386962204

I'd just be intrigued to know if anyone recognises it or knows who made it?

Russell.

WAT


THE


HECK




:laugh:

wow



If that thing lasts more than a few weeks without a crane I'll be impressed

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.

Wow... and no supports whatsoever from what it looks like. Thats insane... im sure it flows like no other... but...... WOW.... hahaha

That is really cool. That length should be good for power, although the collector isn't to great and the cylinders are paired wrong.

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.

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.

nice collector.

speed up all those exhaust gasses so they collide with one another more violently

wait

RHD vehicle.

Yep, its in the UK. Made by an exhaust specialist by the sound of things, but can't find any information on where the design came from ...

Russell.

I dont think that the collector is bad at all.

Collectors are FAR more complicated that just minimum angle is best.

Dann

I've seen enough Hentai to know where this is going.

someone link Fae to this so he can bust a nut

Will it work with LHD steering shaft?

Believe the correct answer is: Who cares?

It wasn't a question so much for me as for OP. Might help him sway away from the tempting manifold.

Don't know OPs location though. Might be UK.

In addition to steering shaft, can you imagine what that manifold would do to a LHD brake reservoir?

It wouldnt be that bad if cylinders 1-4 and 2-3 were paired. As it is, its not that great.

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/attachmen...ine=1386983207

A turbo F1 engine with some crazy collector angles.

https://www.miataturbo.net/attachmen...ine=1386983207

Dann