Why would your IAT be lower than ambient air?

 

GT996......have you seen the graphs posted by JD. He shows a 10 degree drop in IATs.

 

Impossible. At 100% efficiency, intercooler outlet temps would be the same temperature (never lower) as the temperature of the cooling ram air if it would manage to extract 100% of the excess heat. No air to air intercooler is 100% efficient. Intercooler outlet temps will always be slightly higher than ambient, delta T dependent on load, speed of cooling RAM air, and other variables. IAT's will again be slightly higher than intercooler outlet temps due to the heating of the warm engine compartment temps which heats up the Y pipe and other intake components prior the IAT sensor. The intake ducts will force more ambient RAM air through the core but that RAM air can not physically drop the temp more that the temperature of the RAM air itself. I have detailed data on various aerospace intercoolers and none can physically reduce intercooler outlet temps below that of the ambient cooling RAM air, no matter how much RAM air is pushed though the core.

The intake scoop will reduce the IAT temperature, but never below the temperature of the ambient air.

 

He was speaking of delta and no one understood him, he was explaining that it should be cooler now as compared to ambient than it was previously and he was asking for data. He wasn't claiming it would be below ambient, that's obvious. What he's getting at is that there's no instrumented data here, same thing I've said. Testing on different days or claiming butt dyno differences isn't what we are looking for. Common sense says temps ought to drop and that lots more air should flow but cars and common sense don't always work that way. I've seen tiny changes make huge differences back to back to back on a dyno that left everyone scratching heads which is why data is being requested here.

 

I think Johnydangerous showed a delta T of around 10ºC if I'm not mistaken. I'll have Motec data when I get to the track in March/April. I haven't touched my car since the last track day in November.

 

Thank you. That's exactly what I wanted to say.

 

Just ordered a set!

 

I dont think so definitely not in Australia when its 30+ Celcius in the shade.

 

You will love them as much as me

 

Mine also coming in the next days Carbon on Black also

 

I was going back and forth glass Vs carbon. Been doing the same with the Strosek rear wing.
In the end I went glass.

 

Im sad to say there will be no more data from T11ABO, she crashed at hi speed on black ice

 

I don't get what you are saying. 30+ in Australia is not much different to 30+ here in Germany or anywhere else

Given the same outside temperature one should see a difference in cooling efficiency just by the plain higher flow thru the ICs, if these ducts increase the flow significantly. Nothing else is responsible for an increase in efficiency.

Yes I did see the graphs now. What shall I say. I don't have these high IATs to begin with and I do much longer pulls and I also have quicker recovery on ICs. AND my car consumes less fuel AND looks better

I am not saying that these ducts are not working, but the provided data or better assumptions are quite thin, if you get what I mean.

 

Oh no!!! So sorry to hear that, hope you're ok.

 

Sore and hard to move but no bad damage to me, car insured agreed value so not all bad