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How To Fit Rb25 Turbo Onto An Rb20

HotXR6T

By HotXR6T,
in Engines & Forced Induction

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HotXR6T

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Can anyone please tell me exactly what parts are required to put the RB25 turbo onto a stock RB20 manifold? Nay special parts required or do they just bolt on? Also do the R33 fuel pumps have a higher rating than the R32's?

Thanks for all your help for the noob! You guys are great!

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https://www.sau.com.au/forums/topic/149528-how-to-fit-rb25-turbo-onto-an-rb20/
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HotXR6T Collaborator

HotXR6T

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Search dude. This has been covered A LOT.

They bolt straight on except for the elbow, which you need the rb25 one

Sorry, I have done so much searching and reading in the last week I am going crosseyed. Couldn't seem to find a how to. Thanks for the reply.

DJRIFT Veteran

DJRIFT

Posted
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Search dude. This has been covered A LOT.

They bolt straight on except for the elbow, which you need the rb25 one

i was fairly sure that the turbo elbow on a rb20 would fit an rb25 turbo. i think at worst you need to slog the three holes out to suit but only a little bit but the main reason i thought that you use an rb25 turbo elbow was for better flow.

salad Veteran

salad

Posted
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Well I couldn't get the RB20 elbow doesn't fit the RB25 turbo. I just wanted something that would bolt on with no hassles. But the inner diameter of the elbows were different too, so yeah, the flow would be all messed up.

The elbows dont go for much anyway, there's one for sale right now for $50.

Oh yeah, and another thing, you need to get a pressure source to hook up to your wastegate actuator. I just got a nipple tapped into my elbow, some do it on the compressor housing.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Sorry, I have done so much searching and reading in the last week I am going crosseyed. Couldn't seem to find a how to. Thanks for the reply.

Mate,

The sticky thread in this section, called Forced Induction Guide... is just that.

A guide to this section.

If you took (approx) 20seconds, you would see a link called: RB25 turbo onto RB20DET - Exactly what is needed

And this is the link for the thread itself thats linked to the title...

http://www.skylinesaustralia.com/forums/in...howtopic=109753

You dont even need to use the search button its that easy :)

Cheers.

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