Cold Air
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
Cold Air
There is always a debate whether or not cold air is drawn in from the air cleaner area on are C4's, I for one believe there is cold air based on my data logging. I did some data logging today since it is in the high 80's and low 90's on rural roads. Here are some screen shots. P.S. I run a 185 thermostat.
https://drive.google.com/file/d/0B5d...ew?usp=sharing
https://drive.google.com/file/d/0B5d...ew?usp=sharing
https://drive.google.com/file/d/0B5d...ew?usp=sharing
https://drive.google.com/file/d/0B5d...ew?usp=sharing
Last edited by eutu1984; May 29, 2016 at 01:33 PM. Reason: add 185 thermostat.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
That isn't terribly hot air...but it's not what I'd call "ambient" or "cold" air either. I just looked; it's 85*F there right now (almost 3pm your time). What temp was it when you ran the test? IAT's were 100*F. I'd bet that's pretty close to "under hood temps" while under way in the same conditions.
Last edited by Tom400CFI; May 29, 2016 at 02:43 PM.
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
That isn't terribly hot air...but it's not what I'd call "ambient" or "cold" air either. I just looked; it's 85*F there right now (almost 3pm your time). What temp was it when you ran the test? IAT's were 100*F. I'd bet that's pretty close to "under hood temps" while under way in the same conditions.
Last edited by eutu1984; May 29, 2016 at 03:31 PM.
Team Owner
Joined: Aug 2004
Posts: 21,543
Likes: 3,216
From: Park City Utah
Interesting data, and good test, post.
I may do a little more experimenting w/mine. My IAT sensor is in the air tube that connects the air box to the TB. So my readings should be cooler than a TPI's, one would think.
I may do a little more experimenting w/mine. My IAT sensor is in the air tube that connects the air box to the TB. So my readings should be cooler than a TPI's, one would think.
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
That isn't terribly hot air...but it's not what I'd call "ambient" or "cold" air either. I just looked; it's 85*F there right now (almost 3pm your time). What temp was it when you ran the test? IAT's were 100*F. I'd bet that's pretty close to "under hood temps" while under way in the same conditions.
Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
Here is more info on my drivetrain info.
383 stock heads and intake, 24bl injectors, 52mm TB, Comp Cams 08-302-08 cam http://www.compcams.com/Company/CC/c...?csid=212&sb=2
auto with 2.59 gears, headers hooked to single flowmaster cat and slightly louder mufflers.
383 stock heads and intake, 24bl injectors, 52mm TB, Comp Cams 08-302-08 cam http://www.compcams.com/Company/CC/c...?csid=212&sb=2
auto with 2.59 gears, headers hooked to single flowmaster cat and slightly louder mufflers.
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Thread Starter
Drifting
Joined: Jul 2009
Posts: 1,257
Likes: 98
From: Ashland PA
2021 C4 of the Year - Modified Finalist
I did find this from the beginning of spring, the air and coolant temp were both 51 degrees at startup.
https://drive.google.com/file/d/0B5d...ew?usp=sharing
https://drive.google.com/file/d/0B5d...ew?usp=sharing