Wanting to cut my intake open and port it and then coat the runners and the entire plenum with a really effective thermal barrier - then weld it back up. Any thoughts or suggestions?

Would also like to do this on the intake ports of the heads and the combustion chambers. thanks

 

Only REAL way to insulate the stock intake is with a metal heat shield on the bottom and a phenolic type spacer or thick gasket between the intake and head


As to the gains, who knows.


David

 

Any idea where I could find a thick gasket or would this have to be a custom order item? I take it you don't think the coatings would do any good?

 

Had mine coated on the bottom with one type of coating to help repel the heat, and the top was done also with a different type that was suppose to expel the heat. Does it help? I don't know, but it was fairly cheap. Another thing you can do besides the gaskets is to drill holes down the center of your intake bolts to help disperse the heat.

 

I'm a little confussed. Why would coating the inside be any more effective then coating the out side?? If the concern is heat transfer from the bolts it would be much easier to bush the holes and add washer of phenolic or composit material or simply add a flanged composit bushing.

 

Correct, I couldn't remember all the details that a gent was explaining to me some years ago. But yes, there are many little tricks that diehard racers will try for that slight edge. So how about we coat it, bush it and drill almost all the way threw the bolts? That should help slow the heat transfer and help it cool off quicker.

Edit: and don't forget the thicker gaskets.

 

Do you know what coatings were used and how much did this cost?

 

Sorry, I don't know what they used. I think it was somewhere around a $100.

 

Welding it back up after coating is going to do major coating damage and likely have it flaking off into the running motor.

Different coatings have different properties. The best insulators probably wont take the heat in the heads but will the intake. I think you would need three different coatings one intake, one head ports, one for the chambers. The intake manifold I know can be coated and last on the street, the chambers I would think would endup flaking but have no proof.

 

I "think" in a drag car only situation they might, on a streetcar no....it is gonna heat soak no matter what you do.

In my old 5.0 stang days you could put a phenolic spacer between the upper and lower intakes. If you did this along with disabling EGR and removing the throttlebody coolant hoses from throttlebody it did work.

Making a full metal heatsheild for the bottom of the manifold and a thicker intake gasket will help it, CV products make some REAL thick ones, check port alignment though.

David

 

I would think that coating the inside of the runners in the manifold would work if the proper insulating material was used. Even though the intake manifold might be heat soaked the rate of heat transfer to the cooler air would be minimal.

Kind of like having a styrofoam cup down the intake track. You can have hot coffee in the cup but your fingers feel very little heat because the rate of heat transfer is very small.

 

This bares repeating.