engine compartment intake air temperature
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Postmaster
Joined: Jun 2005
Posts: 3,438
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From: New Hampshire
engine compartment intake air temperature
FYI.....
Just spent some time taking measurements of the temperature difference between outside air and under the hood air temps. Real world data using the
Intake Air Temperature sensor from my AIS and readings from my laptop with new Autoenginuity diagnostic software(WOW!...Great tool!)
Conditions: Outside temp 19F, truck is '02 F-250 7.3PSD with a Cold Front grill
insert and NO Zoodad Mod:
Crusin' @ 55mph Intake Air Temp was avg. about 5F more than Outside Air Temp. Long idle brought it up to +30F plus or minus 2 degrees F above OAT. Moving from idle to 55mph it took about 3 minutes to reach +5F above OAT.
Having the Zoodad mod with the Kwik filter setup looks to be a real good idea although slow moving on a hot day in the city will obviously get temps up a bit.
IMO, i don't think Kwik filter folks have much of anything to worry about especially when having the Zoodad mod done with the Kwik mod.
Nut
Just spent some time taking measurements of the temperature difference between outside air and under the hood air temps. Real world data using the
Intake Air Temperature sensor from my AIS and readings from my laptop with new Autoenginuity diagnostic software(WOW!...Great tool!)
Conditions: Outside temp 19F, truck is '02 F-250 7.3PSD with a Cold Front grill
insert and NO Zoodad Mod:
Crusin' @ 55mph Intake Air Temp was avg. about 5F more than Outside Air Temp. Long idle brought it up to +30F plus or minus 2 degrees F above OAT. Moving from idle to 55mph it took about 3 minutes to reach +5F above OAT.
Having the Zoodad mod with the Kwik filter setup looks to be a real good idea although slow moving on a hot day in the city will obviously get temps up a bit.
IMO, i don't think Kwik filter folks have much of anything to worry about especially when having the Zoodad mod done with the Kwik mod.
Nut
Posting Guru
Joined: Feb 2004
Posts: 2,248
Likes: 1
From: Elverson, PA
Awesome info - thanks!! I have heard that once you are on the road, the underhood temps are only slightly above outside temps - but good to know some actual numbers! I know I have no regrets replacing my AFE stage 1 with the Kwik fliter!!
Fleet Mechanic
Joined: Jun 2004
Posts: 1,296
Likes: 1
From: Coal Valley, Illinois
I did a little test today also. Hooked a remote temp sender directly to the filter. Ambient temp was 37 degrees. highway was showing 52-63 depending on speed and wind ect.. Idle at normal operating temps was 65-71. I don't have the zoodad mod yet. I will do that and test it again. This is not as accurate as Nut's, but should give some idea as to what's going on under the hood. I will be traveling south soon, I will try it in a warmer climate and see what happens.
Fleet Mechanic
Joined: Jun 2004
Posts: 1,296
Likes: 1
From: Coal Valley, Illinois
I may try to get the temp sender inside the intake and see what the difference is. Might be worth installing and letting it stay for a while in different conditions. Maybe with some long term numbers, we can put some of the debate about the effectiveness of the 6637 to rest! I will post the results if I do. 
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Nut, whwer is your AIT sensor located? Master cylinder or under the filter. I'm just wonderin if it would have any effect on the temps being in different locations. It may be worth moving it just to find out.
Hink, you could try putting it in the end of the filter like some have done with the filter minder. Actually, that might even provide the most accurate intake temps for the computer to use too.
Hink, you could try putting it in the end of the filter like some have done with the filter minder. Actually, that might even provide the most accurate intake temps for the computer to use too.
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Fleet Mechanic
Joined: Jun 2004
Posts: 1,296
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From: Coal Valley, Illinois
Originally Posted by jtharvey
Hink, you could try putting it in the end of the filter like some have done with the filter minder. Actually, that might even provide the most accurate intake temps for the computer to use too.
Fleet Mechanic
Joined: Jun 2004
Posts: 1,296
Likes: 1
From: Coal Valley, Illinois
Temp Sensor in 6637 filter
I have some better numbers with Kwik filter. I put the temp sensor inside the 6637 filter at the end by my filter minder. Maybe not the best place, but that was really the only place to mount it.
There are a few more pics in my gallery.
Here is what I did. I installed the temp sensor took it for a drive on the interstate at both 65 and 70 mph, total of about 30-40 miles. Recorded ambient temp, intake temp, mph and boost. I then when home and did the zoodad mod and did the exact same trip again. here are the results:
Ambient Temp: 36 degrees
No zoodad
70mph
3-6psi boost
intake temp: 38-40 degrees
65mph
2-3psi boost
intake temp: 50 degrees
w/zoodad mod
70mph
3-6psi boost
38-40 degrees
65mph
3psi boost
45-46 degrees
city driving
50-52 degrees
The zoodad mod seems to make a small difference at the lower speed and boost. I will repeat this when I can get to some warmer weather. Will be interesting to see how it all shakes out with higher ambient temps.
There are a few more pics in my gallery.
Here is what I did. I installed the temp sensor took it for a drive on the interstate at both 65 and 70 mph, total of about 30-40 miles. Recorded ambient temp, intake temp, mph and boost. I then when home and did the zoodad mod and did the exact same trip again. here are the results:
Ambient Temp: 36 degrees
No zoodad
70mph
3-6psi boost
intake temp: 38-40 degrees
65mph
2-3psi boost
intake temp: 50 degrees
w/zoodad mod
70mph
3-6psi boost
38-40 degrees
65mph
3psi boost
45-46 degrees
city driving
50-52 degrees
The zoodad mod seems to make a small difference at the lower speed and boost. I will repeat this when I can get to some warmer weather. Will be interesting to see how it all shakes out with higher ambient temps.
Fleet Mechanic
Joined: Jun 2004
Posts: 1,296
Likes: 1
From: Coal Valley, Illinois
Originally Posted by pbr man
Good info Hink. I was wondering if the sensor was mounted in the actual air stream into the turbo if the temp would show any diiference to the outside air temp?
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Originally Posted by pbr man
Good info Hink. I was wondering if the sensor was mounted in the actual air stream into the turbo if the temp would show any diiference to the outside air temp?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
Originally Posted by jtharvey
I don't think you'd want to mount it directly in the airstream of the turbo. I have seen that it's a bad idea to do that. but can't remember why.
Hink, you beat me to it. What you did was exactly what I had in mind. And it's good to know that, yes it's warmer than a strict cold air intake, it's not that bad.
And we have an intercooler.
Now if someone really wants to lay this to rest they need to strap in several different brands of filter kits and see what the temperature is for each one.
I for one don't have that kind of energy or curiosity. It's simply not too hot for the engine to tolerate, even in rush hour traffic in the middle of Pheonix, AZ.