Best Intake
02-21-2015, 01:16 PM
#17
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Join Date: Jun 2013
Location: Hickory, NC
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Year: 2000
Model: Cherokee(XJ)
Engine: 4.0 L
Here is a Vid of my engine shot with a seek thermal cam. The jeep has been sitting at idle for a bit. I have the Spectre intake and you can see the spectra is cool to the touch in the vid.. when you let it sit without idling it heats up a little, but once you start the jeep it cools right down in a few secs.
check out the vid and look at the spectre.
this is with it at idle
Jeep Cherokee Engine Bay shot with Seek thermal cam. - YouTube
this is just sitting not running, the bottom of the Spectre is a little warm
but like I said cools down right when started.
2000 jeep cherokee engine bay Thermal Video. - YouTube
check out the vid and look at the spectre.
this is with it at idle
Jeep Cherokee Engine Bay shot with Seek thermal cam. - YouTube
this is just sitting not running, the bottom of the Spectre is a little warm
but like I said cools down right when started.
2000 jeep cherokee engine bay Thermal Video. - YouTube
02-21-2015, 01:32 PM
#18
Moderator CF K9-unit
Join Date: Apr 2012
Location: Alaska
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Year: 2000 sport
Model: Cherokee (XJ)
Engine: New 4.0l from s&j engines
Thanks,, Yeah it only gets hot to a little warm when it sits shut down. But once you start the jeep it pulls cool air in and cools right down.
02-21-2015, 02:01 PM
#19
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Year: 1999
Model: Cherokee
Engine: 4.0
Thanks for the posts, guess I've just been racing to many years and have always been an issue, all the way back to carbs and vapor lock.
02-21-2015, 10:31 PM
#20
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Join Date: Feb 2014
Location: Florida
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Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
The air in the cowl intake is moving when the engine is running, and it doesn't have far to go. Even if you heat up the tube itself, the cold air from outside is not in it long enough to be heated. Contrast that with under hood intakes, including the stock airbox, that take up air that has been heated by the exhaust manifold and trapped by the hood.
As for the chrome, a shiny surface traps heat coming from inside an object, but it also reflects heat coming from outside it. When the engine is running, that shiny surface should help keep the cool in and the hot out. If there were hot air being generated inside that tube, the shiny surface would make it difficult to dissipate it. But as soon as you crank the engine, any hot air sitting in the tube from heat soak is sucked into the engine, and you're right back to a nice cool flow.
As for the chrome, a shiny surface traps heat coming from inside an object, but it also reflects heat coming from outside it. When the engine is running, that shiny surface should help keep the cool in and the hot out. If there were hot air being generated inside that tube, the shiny surface would make it difficult to dissipate it. But as soon as you crank the engine, any hot air sitting in the tube from heat soak is sucked into the engine, and you're right back to a nice cool flow.
02-22-2015, 06:43 AM
#22
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Year: 1998
Engine: 4.0L 162,000
The other cowl intake is http://shop.trailheadoffroad.ihostne...ctid=XJCI91-01
The 'bubble' in the tubing that the Spectre houses the air filter is poorer flowing compared to the THOR. Air flow is more important to me. I don't like the Spectre 'step' bends for elbows coming out of the TB and into cowl. THOR is bigger diameter tubing. Spectre is cheaper.
IDK, on a stock Jeep, it is probably a toss up.
Last edited by CobraMarty; 02-23-2015 at 07:36 AM.
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