Pros And Cons Of Single Turbo Placement

[Griffin]

Just weighin up where to mount turbo now im doing away with the twins..I have a GReddy high mountmanifold but the turbo sits more towards the rear, Other options are custom manifold with turbo mounted more forward or using an rb25 modded manifold.

What are your opinions?

[zebra]

Mount it where it fits

[Blackkers]

how big is the turbo

[Ben C34]

Do you want the car to definitely get defected?

[nicksamaniac]

I don't mean to put sh!t on you Ben for your comment,

but- Screw the law,

just paint everything matt black.

Police only seem to see shiney things, they tried to get me for my alloy radiator in my Stagea but failed to see the 90 x 700 intercooler in front and all black cooler pipes!

But to your question, I would suggest seeing how well your dump pipe will fit?

Between the turbo and fire wall.

Edited March 24, 2014 by nicksamaniac

[KiwiRS4T]

Mount it where it fits

^^what he said. If you are getting a custom item take the whole car and turbo and wastegate to the fabricator so that he can ensure the dump pipe will have a clear run and you won't foul the strut tower (or anything else).

[Griffin]

i myself am the fabricator . its a borgwwarner turbo.

[scotty nm35]

The further forward you mount it the more clearance you will have for the 4 inch dump.

If you can bring it forward enough to clear the shock tower with the hot pipe you will be doing very well. Of course this means a custom manifold, which is a lot of work.

[ido09s]

What manifold have you got now? I have a mate looking for a Trust manifold to suit a T78. If you want to sell it let me know

[Griffin]

its a trust triangle flange manifold to suit rb25. if i can't make that work ill start from scratch and bring the turbo forward.

[TTR34]

Go the mighty single!

[ido09s]

I should have also asked what engine, i am after a T4 flange to suit RB26

[Griffin]

no problem. still tossing up whether to go with cast rb25 manifold modified to suit. what's the limit of the 25 stock exhaust manifold on e85?

[iruvyouskyrine]

More than 350kw if you weld an external gate to your turbo housing.

You should do that ^ and report back, no one has a solid idea on the limit of the standard manifold. It is generally accepted that its about 350kw absolute max on stock mani with internal wastegate.

Edited March 28, 2014 by iruvyouskyrine

[scotty nm35]

450+ with a big enough turbo, external gate and high boost.

[Griffin]

any experiences with the trust tubular manifold? are they as bad as the Chinese crap?

[Griffin]

started the fitup today. turbo fits stock manifold without a spacer. will modify the stock manifold for more flow. should turn out pretty stock looking.

[iruvyouskyrine]

Is this on an RB25? I thought you had an RB26 Nur engine or similar for some reason?

[scotty nm35]

will modify the stock manifold for more flow. should turn out pretty stock looking.

No real need, they flow ok for what they are, and thinning it out by die grinding will only weaken an already fragile cast manifold.

[bradsm87]

My vote goes to ditch AC, mount power steering pump down low and low mount turbo, trying to get turbine inlet flange as close to the centre line of the exhaust ports as possible.