Heat shield or not?

Discussion in 'Fuel Economy' started by Gageraid, Feb 25, 2015.

  1. TopSpin

    TopSpin New Member

    I agree with Mendel Leisk. You want to isolate your are intake from your engine compartment temps. The cooler your intake air the better. I use an AFE system similar to yours on my 99 Jeep Cherokee. These old XJ's run at 210 degrees and the engine compartment gets very hot. My plans are to add to the system by insulating the box around the filter and wrapping the tube to throttle body with thermal tape. Then bring in some outside air into the box. Check out the link below.

    BTW, A thermostat in the cooling system determines how fast an engine warms up, not air intake. Back in the day, there was a heat tube to the carburater to help warm up and keep frost from forming in it on a cold winter day. But those are a whole different animal compared to the modern EFI and computer controlled cars we have nowadays.

    http://www.enginebasics.com/Engine Basics Root Folder/Cold Air Intake.html

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