Acceptable Air Intake Temps?

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2000UZJ

2000UZJ

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Joined
Oct 7, 2008
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I did the deckplate mod going into the fall. Haven't seen that high of temps yet. But sitting in dead stop traffic in the middle of the afternoon yesterday with my deckplate open I saw 165*F as my intake temps. I had my AC running full blast and was wondering... how hot is to hot for intake temps? They rise very quickly when stopped and fall very quick as well once I start moving. Does this throw anything off or shorten the life of a component? In the winter it's great. But I'm starting to think a deckplate isn't the way to go in 100*F traffic jams. the engine temp was 195*F like always. Fan was running. My 100 doesn't cool very well anymore, I think it's the large amounts of mud it has eaten :doh:

Opinions?
 
RobRed said:
I have IAT up on my scan gauge constantly and have never seen that high of temps in hot weather. 135 maybe.
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With no air moving into the engine bay and the deckplate open the engine is breathing the air coming off the fan. It rises 10*F/10seconds. I'm not 100% comfortable with temp changes that drastic. I sit in traffic for hours at a time somedays.
 
Trunk Monkey said:
Even in the heat of summer I never saw more than 40* higher than ambient. You sure the sensor hasn't gotten smacked/dislodged/moved next to the exhaust in all your adventures?
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Wouldn't be surprised. But doesn't the air intake temps come from the MAF? My scangauge is reporting the temps BTW.
 
Mine is usually apps 15*-25* over ambient via scangaugue.
 
I'll ask this in simple terms... is 165*F intake temps bad or doesn't really matter? Stock intake breathes through the fender...deckplate breathes through engine bay.
 
The IAT number comes from the MAF sensor so I don't think you can have it move to far from stock location and still be running at all unless you do some major re-plumbing.

On the bright side you're moving under hood heat through the motor and out the tailpipe while sitting?

I like to keep most things as cool as possible, don't know about any specific damage you may be causing though. 1 thought that comes to mind is excess heat in the throttle body may be a negative given the delicate/expensive nature of that beast?
 
i never see temps on mine more than 10-15 degrees over ambient temp.....pulling through fenderwell. If you spend a lot of time in traffic then I am sure it is because all that heat is being pulled through your deckplate modification. I am not sure there is a too hot as the MAF will adjust fuel mixture based on the temp...but not thinking it is optimum.

Never understood if the deckplate really was a benefit...or if snorkel would do the same in increasing air pull. Sounds high to me.... clean your MAF and see if it still gives same temps but my coolant temp is usually 188-200 during Summer or when vehicle is fully warmed up....so I bet that is about right.
 
RobRed said:
Tell me again why you have a deck plate?
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I was at home depot one day last year and thought about it for some reason. Figured why the hell not, I have seen people talking about it so why not see what the hype is about. I love the result (added sound) but I can't get over the intake temps rising and falling so quickly. Figured I would ask here...


:meh:
 
Trunk Monkey said:
It's not bad, obviously colder air is better for performance, but it's not like these things are race cars. I'd be more concerned about the coolant temp and air/fuel mix.
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...and fuel economy. Turbos can spike into the 200-degree neighborhood and don't melt similar intake/MAF/throttle body housing assemblies. And it's not like you're damaging the valves.

I don't think the numbers you're stating are going to put you into any overly lean/rich situations. The 02 sensors and EFI safeguards will check that.
 
Maybe we should start a thread for those with scangauge/ultra-gauge and post up our normal operating temps, o2 sensor voltages, other stuff?
 
petrotk40 said:
Maybe we should start a thread for those with scangauge/ultra-gauge and post up our normal operating temps, o2 sensor voltages, other stuff?
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It's a nice idea but I think it's hard to get data that is very useful other than a quick order of magnitude check unless you compile a painful amount of data to go with the gauge numbers. Off the top of my head I think of things like; endless vehicle maintenance and set up specs, fuel specs, lube specs, location, altitude, wind direction, direction of travel, vehicle load, vehicle aerodynamic numbers and it just goes on.

That said a quick check can be useful like "What range does your TPS report? Mine reports 20-80" "OK, mine is 21-81 so that's probably fine" or "crap, mine is always at 40-50 so I may have a sensor range problem"
 
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