I have been working and funning with my toy to get a cooler intake charge into the cyclinders, to make more power and stuff.

To do this I tried to insulate the intake needswings intake that I have. With measurments I have seen several degree cooler air entering the throttle body with a 1/2 inch foam sleeve of refrigerant line insulation. A 6 foot piece is enough for two pipes ( your buddy ?) and it slips on easily. If you tire of it you may slip it back off just as easily.

The readings of the improvements are related to the amount that the throttle is opened. At cruise the rise due to the heat under the hood can be in the upwards of 15 - 25 degrees. Remember that at cruise the air flowing into the motor is rather low volume and has time to heat up a bunch.
At a stable (?) 50 mph I was able to see 81 ambient and 96 - 110 degree inlet air.

At wide open throttle WOT it is little due to the higher mass and its speed in the CAI pipe. That is harder to read as I cant hit it and read them at the same time and as yet I have not seen a good data logger to play with. [ PC based? suggestions?? ]

With the foam installed the pipe does not get as hot, your fingers will tell you quickly. At the same 50MPH I was seeing ambient of 80 and air in the range of 85 - 87 degrees. Different day, same test.

Without insulation at 50 mph I saw 15 - 20 degree rise, with insulation about half that.

Oooo Oooo Oooo Can I get extra credit for a twofeer????

I also added a piece of Mr Gasket insulation directly below the intake pipe on top of the exhaust manifold to reflect and isolate the radient heat from the passenger manifold up to the intake pipe.

This is soo easy, with a cool engine I made a simple template out of cardboard and when I was happy, cut it out of the pictured material. I wanted to make a layer of material that followed the header pipe so that it would not add heat to the pipe. It is self wedging ( sp ?) I made the cut for the O2 sensor and this aided the retention of the material, too hot for a wire tie.
and sits on top of the manifold easily as shown. The only down side is the outgassing of the material for the first few runs, smells like hot stuff.

Now the heat is diverted from soaking into the CAI from the exhaust manifold and the engine heat is retarded from preheating the inlet air.

The looks of the foam are left to the eye of the beholder but for me I dont care as I drive with the hood shut and I dont open it at drive-ins for others, Too old for that ego stuff, I just wanna know: DO IT GO?


Hate heat Woody



Foam is 1/2 inch wall by 3 5/8"

Mr. gasket high temp material, like for exhaust manifolds ( for thoes that roll their own / aka hard core dudes )

Its been on my car for months to verify the benefits

 

Wow waldig, you have alot of time on your hands, dont you? Great job, I do enjoy your many experiments.

 

that green antifreeze in their also.? looks green to me

 

Heating and cooling is my thing, thats why I keep doing it, its a challange. Yes its green, and is part of the things I find to work, like Prestone.

I had found lots of gunk in the original 12,000 mile old stuff as I strained it when it came out. Flushed it with cleaner twice and saw an improvement immediately.

Woody

 

Interesting but what i really want to know is from 3500-redline when under heavy throttle how much of a drop there is. insulating your CAI couldn't hurt thats for sure. Is there a cheap aesthetically appealing wrap that is usable on intakes?
I am in the works of making my own custom duel CAI, and wonder what i could use to wrap them to slow down heat soak

 

keep it up

 

I would consider non metallic materials to limit heat soaking and to retard the heat gain during the WOT operation. The metal when heated will directly heat the air when you punch it, whereas the composition material due to its lower thermal conductivity will not heat as much. This why its so hot when you touch a cars hood-body in the summer but a wooden board in the sun all day long is much cooler ( you think ) when you lean on it.

The heat barrier that I added to the exhaust manifold would be a real plus to asist in controlling temperatures.

Chilling Woody

 

very cool...... get it, lol.
please if you havent already check the temp rating of that wrap.
do you have aim instaled on your computer? if so please aim me when you get a chance

 

The material is good for 250 F, freon hits that range at times. With the exhaust insulation baffel, it will never see anything like this. I have used this for years on other things like fuel lines to retard heat soak.

aim? Not sure what that is on the computer, please define, thanks.

Woody

 

aim = AOL instant messanger. His screen name is in his profile.