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Standard Afm --> Turbo Intake Pipe

Cake

By Cake,
in Engines & Forced Induction

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Cake Mentor

Cake

Posted
Posted

Couldn't find any information on this when searching...

I have heard that on an RB25DET, the rubber flexible pipe from the AFM to the turbo often sucks closed at high boost? What are its limits in either power or boost levels, before it needs to be upgraded?

cheers,

Chris.

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https://www.sau.com.au/forums/topic/114323-standard-afm-turbo-intake-pipe/
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Sydneykid Grand Master

Sydneykid

Posted
Posted

On the R34GTT we started to run into problems around 245 rwkw. Boost was irrelevant, it's all about the airflow through the tube. How much resistance to airflow (boost) there is after the turbo has no effect whatsoever.

:( Cheersw :(

Ceffy_SA Collaborator

Ceffy_SA

Posted
Posted

Would someone be able to tell me what the consequences of the rubber induction hose "sucking" closed e.g. boost drop/power drop?

Also i have been told that there should a metal winding through the induction hose too, my RB20 dosent have one so it is VERY easy to squeeze and collapse the pipe. Would it be worthwhile finding a RB20 one that has that bit in there, or just going a full metal induction pipe?

predator Grand Master

predator

Posted
Posted

I don't believe they have any metal ribbing in them.. not the early rb20 ones anyhow.

You could always make some ribbing by winding some heavy wire around a cylinder of the same diameter as the tube. Then insert. Cheap non-bling option..

Ceffy_SA Collaborator

Ceffy_SA

Posted
Posted
You could always make some ribbing by winding some heavy wire around a cylinder of the same diameter as the tube. Then insert. Cheap non-bling option..

haha yea thats true, i also woudnt get the uber cool extra loud turbo flutter without a metal induction pipe.

I think i will try finding some wire to put in there as a fix. I have also heard about people making up some bent steel piping and putting it inside the std rubber pipe.

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