Too cold IAT??
03-28-2017, 08:33 PM
#1
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Too cold IAT?? Is there such thing as having too cold of an intake air temp? Say you had a turbo setup running an air to air intercooler, then sprayed meth, and then had the air to water intercooler for a Holley high ram intake. I know, way overboard, but would this show any benefit over just a single intercooler or just meth? If so how much? Just trying to learn
03-28-2017, 08:44 PM
#2
Im sure it would do something, besides drain your bank account lol. Afaik you cant have inlet temps too cold, but it is very unnecessary for a properly sized turbo.
The air to water also has a radiator like heat exchanger that mounts in front of the radiator. So having that and an intercooler could create low air flow across the rad and make engine overheating issues, even worse if you have A/C.
Could it be beneficial, maybe. But ive never seen or heard of anyone doing it. I think a good air to air is plenty, then spray meth for more insurance.
The air to water also has a radiator like heat exchanger that mounts in front of the radiator. So having that and an intercooler could create low air flow across the rad and make engine overheating issues, even worse if you have A/C.
Could it be beneficial, maybe. But ive never seen or heard of anyone doing it. I think a good air to air is plenty, then spray meth for more insurance.
03-29-2017, 09:44 AM
#5
I don't think so. Guys running direct port nitrous have to have crazy crazy cold intake air temps with the nitrous. when its cold outside with the meth I see IATs as low as 38* once and aside from zero traction car ran great.
03-29-2017, 09:49 AM
#6
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Is there such thing as having too cold of an intake air temp? Say you had a turbo setup running an air to air intercooler, then sprayed meth, and then had the air to water intercooler for a Holley high ram intake. I know, way overboard, but would this show any benefit over just a single intercooler or just meth? If so how much? Just trying to learn
I think the hi ram cooler is in question as to reducing temps at all.
Promods run straight alky with 30psi and no issues or radiator needed...
03-29-2017, 02:32 PM
#7
Depending on your intake setup, you can have too cold of iat temps concerning meth injection. I chased a cylinder head melting problem for a few seasons where the meth would be too cold to flash off, run down into a cylinder, and ignite under pressure at unfortunate times..... Iat was always under 65f prior to meth injection when it would happen.
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04-01-2017, 02:38 PM
#11
Depending on your intake setup, you can have too cold of iat temps concerning meth injection. I chased a cylinder head melting problem for a few seasons where the meth would be too cold to flash off, run down into a cylinder, and ignite under pressure at unfortunate times..... Iat was always under 65f prior to meth injection when it would happen.
04-01-2017, 11:38 PM
#14
When u guys post air temp are u factoring in false reading from the cold liquid hitting the sensor? For years I thought my temp at the end of my pass were 80-90deg until i moved the jets and sensor really far apart
04-02-2017, 04:15 AM
#15
I suggest several sensors, placed in well thought out locations along the way. For example, off the compressor, pre intercooler, post intercooler, t the throttle body, in the intake manifold. This way we can correlate data and create a graph which will eliminate false high or low reads by using common sense.
Ex1;
compressor outlet: 243*F
pre-intercooler: 227*F
post-intercooler: 125*F
pre-throttle body: 109*F
intake manifold: 112*F
I can safely say within a fair confidence interval that the air temperature as it entering the combustion chambers is between 108*F to 115*F given the above data.
Ex2;
compressor outlet: 213*F
pre-intercooler: 205*F
post-intercooler: 125*F
pre-throttle body: 118*F
intake manifold: 172*F
It looks like the intake manifold sensor is suffering the dreaded "heat soak" behavior in Ex2. It requires further investigation.
Ex3;
compressor outlet: 233*F
pre-intercooler: 225*F
post-intercooler: 165*F
pre-throttle body: 158*F
intake manifold: 108*F
It looks like there is a problem with the intake manifold sensor reading false low in Ex3, maybe a bad sensor, bad calibration, or poor placement, we would need to investigate.
Just random examples to show how multiple sensors might be used to generate a thorough report.
Ex1;
compressor outlet: 243*F
pre-intercooler: 227*F
post-intercooler: 125*F
pre-throttle body: 109*F
intake manifold: 112*F
I can safely say within a fair confidence interval that the air temperature as it entering the combustion chambers is between 108*F to 115*F given the above data.
Ex2;
compressor outlet: 213*F
pre-intercooler: 205*F
post-intercooler: 125*F
pre-throttle body: 118*F
intake manifold: 172*F
It looks like the intake manifold sensor is suffering the dreaded "heat soak" behavior in Ex2. It requires further investigation.
Ex3;
compressor outlet: 233*F
pre-intercooler: 225*F
post-intercooler: 165*F
pre-throttle body: 158*F
intake manifold: 108*F
It looks like there is a problem with the intake manifold sensor reading false low in Ex3, maybe a bad sensor, bad calibration, or poor placement, we would need to investigate.
Just random examples to show how multiple sensors might be used to generate a thorough report.
04-02-2017, 11:29 PM
#16
this is a good point and my M15/M10 dual meth tips and IAT sensor are about as far apart as I can get them on my setup until I move the IAT sensor to the back of the intake or something. but no, my IAT numbers posted above are just what my sensor reads
