BMC vs Hot Turbo

[Superfly]

Ive searched but havent found anything.
What's the recomended distance we should be shooting for between turbo to BMC? 1/2" 1" 3"? I plan on running a blanket and shield but still wanma know.

[Kingtal0n]

BMC <air space> shield <air space> shield <air space> blanket, coating, turbo

distance is nearly irrelevant. what matters is the K conductivity of the materials, insulating properties, rate of heat input, and specific control volume or 3-D surface element under consideration. And I probably left something out. But the overall distance when it comes to energy-light situations (heat reflected by a shield is infrared light right) isn't a large factor because light has no trouble going long distances and conserving its energy along the way (consider sunlight). i.e. Adding a foot of airspace isn't going to be much more effective than an inch for many situations. Convective air-heat transfer is relatively limited and negligible in many situations. In other words, air is a reasonable insulator, I think it is understood.


google "air is an insulator"
Search Results
Air is a collection of gases, and it is not a good conductor or radiator. Air is excellent at convection, but the amount of heat that can be transferred is minimal because the low mass of the substance cannot store a great deal of heat. Air is used as an insulator in coolers and building walls.

[slider2828]

Yuo he hit it on the head. If you are getting so much heat theb doing a naca duct using venturi affect across the hood helps a lot. Just like R35 hood vents

[Superfly]

So if I understood right what matters is the type and amount of insulation correct?

[brndck]

So if I understood right what matters is the type and amount of insulation correct?

ACCURATE. Gold foil is an excellent insulator, so one of the sheetmetal shields that are common for s-chassis, with gold foil on one side, or even BOTH sides, would be a good start

https://frsport.com/p2m-p2-bmh0134-gd-brake-master-cylinder-heat-shield-1989-1994-s13-nissan-89-98-240sx?gclid=CjwKEAjwlujnBRDl2teOp_veulQSJAC5bHgtHD-hwa_5tsavCQE4XqJtZHuoBwgNPpsL4hYigjKsmhoCs0zw_wcB

https://www.maperformance.com/products/dei-reflect-a-gold-heat-reflective-tape-roll-0103xx?variant=9309318659&gclid=CjwKEAjwlujnBRDl2teOp_veulQSJAC5bHgt_ScaWCB4 bvO6cW0fI41LYNvlFcAZWhuHaDSVWTOcJxoCUzLw_wcB

ALSO, there is an xterra/pathfinder master cylinder available that moves the brake lines FARTHER away from the turbo (lines now insert on the drivers side of the BMC, not the psgr side) but you'll have to either bend new hard lines or get braided lines

https://suspicious-garage.myshopify.com/products/nissan-frontier-pathfinder-1-brake-master-cylinder-and-brake-line-relocation

[Kingtal0n]

The thin foil type of materials are "radiant barriers"
https://en.wikipedia.org/wiki/Radiant_barrier

can be used in conjunction with insulation, which is a non-reflective surface typically (syrofoam, fire blankets, fiberglass)

It is different. You can use one or the other, or both. In conjunction with elegant planning (location and spacing)
Sometimes a thin reflective surface properly positioned without ripples can be as effective as a thick thermal material.
Depends what we are doing. Since this application is "not going up in flames" I would never depend solely on any one of anything to protect the car.

This is diffusion equation homework assignment shown using fourier's law and conservation of energy
https://i.postimg.cc/j2Sk51BM/IMG-2185.jpg

[afishysilvia]

Use a bmc from a RHD car that swaps the lines on the other side, but as brndck mentioned you would have to bend the lines.

[Superfly]

Man my brah s throbbing. But I gotcha. I really appreciate the knowledge shared.

Yea i have a pathfinder BMC imstalled currently with lines bent.

I will be sure to go with both. Thanks again guys