Yea you did...they're prob being shady yet accurate by claiming a "spaceage" material, ie plastic It's right up there w/ itemization

As for the TB that Garfinkle polished, yea that bad boy is on my car. But I took off the FIC and bypassed the coolant flowing thru the TB. I never polished my UIM tho. It was on the list, but toward the bottom.

BTW, did I ever give you my old TB and pay you for Garfinkle's polishing??

 

I don't remember if I every got your old TB.. I know you paid me..

 

Actually, the ACV gasket from Mazda looks a whole lot like this material. It may already be in your car

 

the material is called phenolic resin

"laminated phenolic composite with a thermal conductivity of 0.29 W/m*K. Aluminum on the other hand has a thermal conductivity of 150 W/m*K"

"can withstand temperatures up to nearly 300°F, and has a thermal expansion coefficient very similar to aluminum to increase sealing capabilities"

im not sure about how the would stand up to the heat where they located on are cars i have a infared thermomater but my car is torn apart right know so i cant get temps of the LIM,UIM maybe next week

 

 

Q=h*A*dT

That's what they keep grinding into our heads here at school. heat transfer is Q, h is the heat transfer coefficient (can be found in a thermodynamics book), A is the area and dT is the difference in temperature between the two things.. in your case air and aluminum. How much difference does it make? I'll let you know after I finish all my 412 reports.. the NAMD I have to do for senior design and the presentations I need to put together.

Can't wait for summer.

 

After taking physics in Engineering for a while, here is what I think:

There is a concept as they call Black body radiation, meaning that any object that is warmed up begins to lose energy through radiation; the wave length and intensity of the radiation depends on the type of material. The point is that the UIM does not generate heat but itself from inside since its hooked up to IC, but it gets attacked by the heat radiation of all the other components under the hood. A polished UIM is capable of reflecting a BIG portion of radiation Vs. the stock that would absorb instead.
And regarding the surface area, yes it’s negligible.

I'm getting it Polished, end of story.....

-ray

 

If he made this statement he's an idiot and I'd take his view for what it worth. I don't know if you've ever looked closely at the difference in castings from year to year (if you polished them you'd see the difference) they abviously had different company's producing the castings as some are much smoother than others and the amout of surface area is miniscule to say the least, not to mention the only way it would make a difference would be good air flow over the motor, and prevent the heat from trnsferring to it to begin with. That would mean isolate the heat from the turbo's and exhaust and then Jet hot coat the manifold on the exterior to help reject the heat transferr. Just keeping the engine bay area clean would do more for the cooling of the motor than anything (if you've seen some of the engine bays of cars that people just don't care about) most people that take the time to have the parts polished generaly care enough about the car to keep it clean and I doubt seriously it would make a difference. Am I biased ? ? ? Perhaps (because I chose to polish my stuff and provide polished parts for those who care to) I had a jet hot coated UIM and there wasn't any difference (perhaps because I didn't improve my heat protection from the turbo's and exhaust, and my LIM wasn't Jet hot coated so it was a waist of time) but Like I said the castings vary in texture and the bumps are a result of the process and nothing more. If anyone thinks it provides a pourpose ,.......well then I have a 5.7 lite rotary motor available for anyone who wants to buy it. (-: Jack
I've had a Jet hot coated UIM for sale for 6 months and have finally traded it for a stock on so I can have it polished. Aluminum transferrs heat really well (used in most all electronic's just for that pourpose, and the only way to really improve or make the UIM more efective would be to add fins and provide some source of air movement over it, other wise polished or stock (miniscule issue).

Someone who takes the time to keep the engine bay clean and prove the air flow for lower under the hood temperatures

 

really, for what its worth and after a megaton of calculations. there would be more "performace" if you want to call it that from duck taping a damn ice cube to the UIM than there would be from leaving it "as cast".

 

If anyone want's there stuff polished contact me ! ! ! ! ! LOL you'll notice the heat blanket on the turbo's in the last picture that made one hell of a difference in under hood temps and turbo area.

 

Man...talk about an old thread! This is from last February! haha.

 

Sso much for paying attention ! ! ! ! I was wondering how it got to so many post without me catching it when it started. LOL Oh well nothings changed ! ! !