gt37vgt

Hot hot ??? well push your turbo well off the right of the map and you can easily 130C air temps .

I really thought it was unanimous that the turbo to cooler pipe should be bare aluminum and it does move a bit of charge heat ..
not so clear on the other pipe

drift a 944

So...

Have we reached a conclusion on this? I tried to read through the last couple pages but I don't see a definite answer.

Is carbon fiber IC piping a consideration or completely out of the question due to insufficient heat tolerances? From what I have heard, carbon fiber does not absorb heat (or much less than aluminum anyway..), but the resin material can melt past a certain degree temp. I have seen them on supercharged cars, where heat is not as high, but I don't think I've seen carbon fiber on a turbo setup. I really have no idea just thought I'd bring it up, while on the topic.

951_RS

Sounds like insulating your pipe directly over the radiator exclusively would be the best solution if you want to insulate them at all. I'm curious now though as to how well the stock pipes dissipate heat.

gt37vgt

yeh it is a bit of a brain teaser hey ?
I would still say aluminum for turbo to cooler pipe .and non conductive for the post cooler pipe also non conductive for the inlet manifold ...

carlege

Considering how fast this air is moving are we really getting anywhere with insulated pipe?

2bridges

in a moving car with airflow through the engine bay I think not.

proverbial "pissing in to the wind" I suspect

67King

I'm not going to argue if Lindsay has data, but the 944 does not have a good way to move air out of the engine compartment. A friend of mine who races a 951 in PCA events has taken some data, and seen pretty high underhood temps. It unfortunatley hurts the efficiency of the intercooler, as well. You really need a negative pressure, but there is nowhere for the air to leave the engine bay. If you can put heat extractors on the hood, it should make a big difference.

On edit - okay, I guess I did kind of argue. I don't remember what numbers Rick saw, but they did lend credence to the point of having an insulated pipe on the IC to TB junction.

spyder348

the verdict is in turbo to IC unwrapped, IC to TB wrapped. thanks guys

toddk911

You are close to an idea I posted about years back.

Tie in/extend the ac freon lines and "coil style" wrap them around the post IC pipe.

But that was before I knew much about water injection.

NOTHING cools intake temps better and more cheaply than water injection.

toddk911

I do have this:

Still working on getting actual temps but in 45 degree or less days on WOT
20psi runs my pre IC is only warm, post IC is COLD and intake manifold is also cold and not hot until you move your hand right up by the head.

The post IC is almost as cold as the exterior sheet metal....so that means the air temps in there have to be only slightly above ambient. So maybe 90-95F pre IC and 50-60F post IC and that would follow with Mike L data of the IC taking about 40-50 degrees or so out of the chanrge air.

951_RS

Just get a maf divider to keep your filter away from engine heat and it sounds like we're good to go after at least modifying the ic endtanks

Mike Lindsey

Our testing showed a temp drop between the intercooler outlet and the intake plenum.
We would not insulate that pipe either. This was a complete stock bodied car and it still had
the hood seal at the rear. You can theorize and guess all day long. We did the testing,
we are sharing what we learned, and anybody can either accept the reality of it, or not.

If you could move even more air out from under the hood and replace with ambient, then you would have even greater temp drops through the stock pipes and intercooler.

It's like the 3" vs. 4" exhaust debates. Someone says "I made 400 WHP through a 3" exhaust so I don't need any bigger". To that we say " Sure you did, and you would make even more with a 4". Or a 5.

Rob

I wonder if this will help?

2bridges

that's odd - looks like your vent is backwards to me -

you wanting to suck (via low pressure) out, not push air in ?

DanaT

rob is that a D9 unit?

-Dana