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Sorry to hijack the thread but this is still on-topic...

Does anyone know why the stock intake "tube" is shaped like it is? If changing it to a metal pipe will improve airflow, why is it not metal from the factory?

Not trying to flame, just innocently asking the question. Is it just so its more flexible, being all rippled? Cos I would've thought that the ripples would cause more turbulence with airflow.

A metal pipe would also get hot and possibly affect intake temps...maybe?

Can anyone offer a good explanation of which is better between the stock thingy and a metal intake pipe and why?

Just curious to know. I'm just reluctant to change mine cos it may be shaped like it is for a reason.

As far as i know 33's there are metal reinforcements in the ripples, and i haven't really looked but i'm guessing its smooth inside
I believe that it's for flexibility. Inside there should be metal shaped like a spring to hold the tube from calapsing(sp?) on boost.

There wasn't any reinforcing in mine. And I haven't seen one yet that has it.

If you you want reinforcing, then do this:

http://www.skylinesaustralia.com/forums/Re...l&hl=rev210

Edited by KeyMaker
There wasn't any reinforcing in mine. And I haven't seen one yet that has it.

If you you want reinforcing, then do this:

http://www.skylinesaustralia.com/forums/Re...l&hl=rev210

I honestly don't know if the skyline(rb's) have them, but I'm pretty sure the SR's do. I remember checking out a car with a hose that didn't have the reinforcement and it couldn't rev past ~5krpm. I first wasn't sure what was going on, but when we changed over to a hose WITH the reinforcement, the car easily revved.

Sorry to hijack the thread but this is still on-topic...

Does anyone know why the stock intake "tube" is shaped like it is? If changing it to a metal pipe will improve airflow, why is it not metal from the factory?

Not trying to flame, just innocently asking the question. Is it just so its more flexible, being all rippled? Cos I would've thought that the ripples would cause more turbulence with airflow.

A metal pipe would also get hot and possibly affect intake temps...maybe?

Can anyone offer a good explanation of which is better between the stock thingy and a metal intake pipe and why?

Just curious to know. I'm just reluctant to change mine cos it may be shaped like it is for a reason.

yeah the steel intake pipe will promote a lot more heat soak, but during load and high suction heat wouldnt get a chance to soak into passing air

only at idle would temps go up i'd imagine

A good way around it is to just by some 3" alloy or steel pipe and 2 3" hose clamps and just cut a small section out of your stock intake (about 3 ribs or so) and put the metal pipe in between the now 2 sections (about 12 cms of metal pipe) this will prevent it from sucking closed. :P

  • 2 weeks later...

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