Is this worth it? Phenolic Intake Manifold Spacer
09-14-2006, 05:00 AM
#21
yes it does... that is my current opinon. In a really complicated way it isolates the IAT Sensor
I think I could see the same performance by making an IAT sensor Phenolic gasket
09-14-2006, 05:13 AM
#23
no it doesnt.
the sensor in a pure sense measures the intake AIR temperature. it should be tolerant of sensor base temps, i.e. changes to the supporting structure, i.e. the intake manifold.
whether the intake manifold is 32deg F or 200 deg F should not matter to the AIR temp sensor.
the fact that the manifold temp does effect the IAT sensor does NOT mean the IAT sensor is giving "false" readings, if anything the manifold heating the sensor up would cause "false" IAT readings (since an insulated manifold will always track near ambient temps)
will, you and i have talked about this and we're basically in agreement, but the original poster is in error.
whether the intake manifold is 32deg F or 200 deg F should not matter to the AIR temp sensor.
the fact that the manifold temp does effect the IAT sensor does NOT mean the IAT sensor is giving "false" readings, if anything the manifold heating the sensor up would cause "false" IAT readings (since an insulated manifold will always track near ambient temps)
will, you and i have talked about this and we're basically in agreement, but the original poster is in error.
09-14-2006, 05:14 AM
#24
AudiWorld Super User
Join Date: Mar 2004
Posts: 4,350
Likes: 0
Received 0 Likes
on
0 Posts
Have you ever looked at logs of an engine running before??
If you watch the reading on the IAT sensor, it will actually spike when you let off the gas.
When the throttle plate closes and there is no more fresh intercooled air passing by it, the temperature reading can spike 30+ degrees. That is simply because the IAT sensor is registering the heatsoak that it picks up from the manifold.
;-)
When the throttle plate closes and there is no more fresh intercooled air passing by it, the temperature reading can spike 30+ degrees. That is simply because the IAT sensor is registering the heatsoak that it picks up from the manifold.
;-)
09-14-2006, 05:16 AM
#25
AudiWorld Super User
Join Date: Mar 2004
Posts: 4,350
Likes: 0
Received 0 Likes
on
0 Posts
ok, you are correct. See my second post above. we are both correct.
when i said "false IAT readings", I meant that it will register heat soak from the manifold...so it is still giving accurate readings, but they are inflated due to the temperature of its supporting structure.
09-14-2006, 05:25 AM
#28
AudiWorld Super User
Join Date: Mar 2004
Posts: 4,350
Likes: 0
Received 0 Likes
on
0 Posts
i see why my first statement is not clear. Here is what I am saying:
I am saying that a phenolic spacer doesn't allow heat from the head to heat up the intake manifold (that's a GOOD thing), and hence your IAT sensor won't give inflated IAT readings.
From the beginning I have been saying that phenolic sensors are GOOD...i just didn't make my first statement very clear.
From the beginning I have been saying that phenolic sensors are GOOD...i just didn't make my first statement very clear.
