I have an odd question.

I have some plans drawn up for an intake manifold that I plan on getting C&C'd at a freinds shop. However since you all know the location of the exhaust and the intake on the leaning tower of power then you know that the exhaust is designed to heat up the intake. Now if I made a new exhaust manifold with heat wrap that may solve some of the problems, but my question is. What type of metal should I use for the Intake manifold?

My buddy at the shop says aluminum would work pretty well, but if anyone else has any ideas then please let me know. Also if you can reffer me to a specific stock of aluminum that would help me out alot too.

I know it's not specifically engine related but I hope you guys have some Ideas.

Thanks in advance.

What are your goals with this new intake, and what problems are you trying to solve?
Are the runners "wet" or "dry" - Carb / TBI or port-injected?
Are you trying to keep the intake insulated from exhaust heat?
Are you going to CNC from billet, or from a casting?
Are we talking a possible production piece or a one-off?
Are you stuck on metal?

_________________
"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

I apologize for being unclear. I did not realize that I hadn't answered these questions.

I plan on CNC from two billet pieces that would be bolted together.

yes I am worried about exhaust heat getting into the intake. which I why I'm wondering if Aluminum is a good choice?

The goals with the intake is to use it for a blow through intercooled turbocharger set up. I want to use a throttle body instead of a carb and put injector bungs close to the cylinder similar to the bosses in a clifford intake making the intake an MPFI system. Except I don't like how the clifford intake has the carb/throttle body on top of the intake which can make it difficult for hood clearance.

The other feature that I had planned out was a division between cylinders 1-3 and cylinders 4-6 so that the air is distributed more evenly.

I need to draft the plans with a cad software, as soon as I do I'd be more than happy to put some images of it up on this board.

If the intake works well enough, then I guess that I could make a bunch of them and sell them. but for now it's just something that I wanted to make for myself.

any more questions would be great, but I'm always looking for help I know there's a couple of threads talking about this. I'm not a professional engineer, I'm just getting some help from one.

_________________
If you are going to tell people the truth you had better make them laugh, otherwise they'll kill you!

-George Bernard Shaw

The exhaust heating issue is small than you think on intake manifolds.

But you DO need SOME heat from coolant on the aluminum intake's plenum bottom area if this manifold is slated for wet manifold use (example carb or TBI). Carb and TBI DO need heated air scooped from the exhaust manifold (make a steel or aluminum shroud around the exhaust manifold and length of metal flexible hose to the air cleaner via thermostatic flapper valve. If you are doing dry manifold (MPFI), no need to use heat at all.

Cheers, Wizard

It sounds like an interesting project.
Aluminum has been used for a lot of intakes, including all of the aftermarket slant six pieces I've ever seen. This is probably more because of the relative ease of casting aluminum than the thermal properties.
I asked about intended production partly for that reason - CNC from billet costs a lot compared to a little CNC finish work on a casting. But for onesies and twosies, making the molds might not be cost effective for you. Casting and machining properties of the alloy have to be considered.
So, you're looking at a sidedraft design? There have been some using Weber-style carburetors, and there are throttle bodies that directly replace those.
We like drawings, pics, whatever you have!

_________________
"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO