I'm going to be installing thermogaskets soon which will isolate the metal contact to the engine and was thinking of possibly thermowrapping the manifold. No it wouldn't look "pretty" but you could pretty much wrap the entire thing in thermotape

 

I would think that would keep heat in the manifold which you don't want?

 

+1, that is one reason intake manifolds are aluminum, because they disappate heat better than steel (and aluminum is a hell of a lot easier to work with). But as far as I have read, you want to keep the heat contained post-combustion, but as little heat pre-combustion.

Now that doesn't mean that thermo wrapping it wouldn't be beneficial. One thing I can thing of, is that it would be less likely to heat soak because of other engine components heat.

I'm just shoot out theories. Anybody care to confirm or correct this?

 

well how is a manifold different than a metal intake tube in terms of wanting to wrap it or not to deflect heat?

A metal intake tube sits right above the header area or a lot of turbo kits have turbos right next to the intake tube and will heat up. That's kinda similar to the manifold sitting on top of the engine and heating up

people use heat wrap on exhaust parts to keep heat in, but use reflective thermotape on intake parts to keep heat out.

 

You have a point. Maybe it would be beneficial.

 

the only other thing i want to reiterate is that by using thermogaskets - you're not making the manifold have direct contact with the engine anymore so you won't get heatsoak that way.

On the inside of the manifold, the air only rushes into the engine, so the flow of heat wouldn't be rising up into the manifold so much from the inside - that leaves the outter ambient temp to heat up the manifold...

 

that what was thinking about. The air just rushes in and doesn't stay to get heated. But it sure gets hot there

 

well i think the temp of the manifold will play a roll. Why do drag racers put icebags on their manifolds before a race?

If you went running for 10 sec in the desert vs antartica, I'm sure you'll feel hotter or colder depending on where you were


what I was meaning is the heat that would be coming up thru the ports going into the heads - the air flow generally would be blowing the heat into the engine. The ambient temp still heats up the metal though and the air passing by that metal as it goes into the engine I think would pick up some of that heat

 

So, is this recomended as a solution??


ISO Thermal upgrade
by motordyneengineering.com

 

i think that by doing this the manifold will take longer to heat up, as well as longer to cool down...so if you aren't driving for a long time it should help keep the air temps cooler, though i'm not sure how much cooler they would be. I think a more important thing would be to make sure the air coming into the filter is cool because i don't think that the incoming air is in the tubing for a very long time before it enters the cylinders

 

hmm yeah

steel is going to take awhile to cool off anyway, but yeah that's an interesting point. The steel in it will probably heat up sooner or later

 

You could ceramic coat the inside of it so the outside would still be nice and shiney.

 

ok I'm thinking about jethot coating the inside of my intake tube and SSV and thermotaping them up..any thoughts?? Would also be running a vented hood

I really have it in for eliminating heat...

 

Why not just jethot coat the inside and outside of everything.

Everything I have ever heard about thermowrap is negative.
Everything I have ever heard about jet-hot coating (and ceramic coating) is positive.

 

wouldn't jethot coating the outside trap heat in? While on the inside keeps heat out?

I'm going off of what BJ from 350EVO does to his race car. He says their car has the inside sandblasted and ceramic coated, then wrapped in thermowrap

 

Not if you coat the inside as well. Then where will the heat get absorbed? All sides of the metal are coated.

As for trapping ambient heat from the combustion chamber in the engine I would figure that couldn't happen in a moving vehicle. Cold air is always rushing in and down into the engine. So, the ambient heat from the combustion chamber would have to go against the flow of incoming air, and then it would have to sit in the plenum long enough to heat up incoming air. Two things that I can't see happening in a moving vehicle. (actually, your vehicle doesn't even have to be moving...just reving.)

But, I'm sure the guys at 350evo know their shizzle and you should listen to them over me...I would. However, if you are going to get the inside of the plenum jet-hot coated....you might as well do the outside as well and screw the tape.

 

yeah hmmm well the sterling jethot would look better than thermowrap...

well I'll talk to the guys at jethot when I drive there (5 min away)