Temp of Brake Booster?

[butteiful]

Hi all,

I'm working on making some 3d printed brake booster elbows that are NLA. I am curious if someone can shed some insight into what temperature the brake booster is exposed to in the engine bay at operating temp? Will use this information to determine the best material to produce these elbows.

[Preyupy]

I would expect that being on the intake side of the engine temps of less than 180 deg F would be normal.  On a hot day when the engine is shut down it could spike to above 200 deg.  You also need to consider some of the other things going on there.  There is a possibility of exposure to fuel, oil and brake fluid that some plastics might not like.  

[John76]

I put a thermocouple near the distributor to see how hot it gets during normal driving and then sitting in the hot sun after a spirited drive.  Outside temp on day of test was 74 deg. Driving 25mph + temp was always below 85 deg. Lots of air flow through the right side of the car. I suspect the heat shields on the exhaust manifold and above the steering linkage helped the air flow through the engine bay.  The shroud on the radiator probably helped as well. 

When stopped, as expected, the temp spiked to about 150 degrees. This is on the exhaust side of the engine, with the hood closed (Fjord blue paint) parked in the sun (no clouds or shadows) after a 70mph freeway run. 

I don't think the brake booster gets the same air flow (too much stuff blocking a smooth exit under the car) on the intake side of the engine, but this would be interesting to test.

Byron @Preyupy makes an excellent point to select the right material that will withstand any chemical exposure.

 

John