Pros And Cons Of Single Turbo Placement

[Griffin]

Yes its on an RB26, coming together nicely. Whats the smallest external wastegate I can get away with?

Does anyone have an r34 gt / gtt airbox I can trial fit in the Newcastle area?

[scotty nm35]

Whats the smallest external wastegate I can get away with?

None? Just weld it up.

What are your plans boost wise, and how is the gate mounted. Will it be a screamer? It's all dependant on flow through the gate. I wouldn't go smaller than 40mm personally, preferably 50mm+.

[Griffin]

22 to 25 psi. non screamer. mounted off turbine housing. not much room to work with. looking at something compact.

[scotty nm35]

Turbosmart 40mm is about as compact as you can get.

[iruvyouskyrine]

How did you fit an RB25 exhaust manifold to an RB26 head? The exhaust flange pattern is different.

[zebra]

Was wondering the same thing

[Ben C34]

It's not that different. I'm sure a little cutting and welding is involved but nothing serious.

[Griffin]

yeah its no big deal

[bubbabooga]

Any chance you could post up a pic of your modifications to get the rb25 manifold onto the rb26 head as I'm currently going threw the same process and after ideas.

Cheers

[Griffin]

No worries, I modded it today, was a bit of dicking around. Will put up pic after it get it surfaced and clean it up.

[bubbabooga]

Sweet cheers!

[Griffin]

Here are some pics, the black you see on the surface is only paint from where I marked the gasket for port matching.

[zebra]

Nicely done

[Griffin]

Thanks, I wonder if its a first? The 26 ports are about 3mm larger than the manifold,i gave them all a good clean up while I was at it.

It will all look pretty neat with factory heat shield in place.

[bubbabooga]

Nicely done indeed! Cheers

So you just weld on small tabs then drill them?

[Griffin]

I cut the 2 flanges off , switched them over end re-welded back on.

[GTScotT]

I assume you are going to deck the manifold now? It would need it if you don't want it to leak.

[Ben C34]

He said he will a few posts up.

[GTScotT]

My bad

[Griffin]

its already been done mate