I am doing a thermodynamics project for one of my classes and need to know what the average temperatures of the compressor outlet are. I am "designing" a water to air intercooler and need to know how hot the air is going into the intercooler from the turbo. Any estimates?

 

Are you wanting numbers for the exhaust temps before it enters the turbo or after the turbo and pre IC?

 

Try this link for temps.
https://www.ford-trucks.com/forums/4...st3684558.html

 

I don't think that thread is going to help him...

I'm not sure what the temps reach on the Powerstroke. I do have a link here that could help you in your class. Read the section called "Intercooler Theory" since that pertains to your question. Actually, might want to read the whole thing, lots of good info in there: http://www.turbomustangs.com/turbotech/main.htm

 

Under a lot of boost with the stock turbo, it can get to ~200* F+, IIRC. AE can monitor the manifold air temp post IC, but there is no sensor in the stock set up to measure it pre IC. However, there has been a lot of experimentation done, and that number sticks in my head for some reason. The discussion came about when some folks were arguing about how much of a difference it made with an open air filter element like the 6637 compared to the AIS which draws air in from in front of the radiators. Post I/C numbers were near ambient to close to 150* F.

Hope this helps -- I'll look around and see if I can dig up the info I had on this...

 

Here are a couple graphics that might help. I thought I had Post turbo data in here, but it's PRE-turbo IAT (intake air temp) and MAT (manifold air temp, post IC). BUT, you can assume some amount of heating over the IAT values, so maybe that's where the 200* came from in my head...

Data:


Graph:

 

Pre IC temps, like at the turbo outlet can be as high as 400* F. That's going to be under high boost, but figure on that as a max temp.

 

Damn Jeremy! That high? I'm assuming that's really reaching at the extreme end of the stock turbo's capabilities.

Makes me want to install a temp probe....

 

I don't have a clue, but I am sure that you could run your truck on a dyno to simulate load and shot the pipe coming off of the compressor with a hand held infrared thermal monitor and see what the pipe gets up to. You could also find a heat sensor and tape it to the pipe, run the wire to the cab and see the temp there. The hand held monitors can be found at Home Depot or Lowes. I have a $75 dollar unit that it spot on, it's cool to see what temps everyday stuff will get to.

 

Yeah Joe, that high. I remember seeing some vids, which I have tried to find this morning, that showed the inlet and outlet temps of an IC. I believe it was back when the Spearco IC was first coming out. Inlet temps ~400 and outlet temps ~100, give or take 25*. But, yes, that was at max boost. Put in a temp probe...I think you'd be surprised!

Andrew, I wonder if an IR gun would give an accurate measurement? The truck would only be at max boost & compressor outlet temp for a few seconds. Do you think that would be long enough to heat soak the IC tube and get a true temp reading? I'm thinking a temp probe would be the best for sure, but the IR gun may work just as well.

 

Thanks for the info guys. Does anyone know the flow rate for the stock turbo or have a compressor map for the stock turbo?

 

That is a good point, I though of that, but could you not just keep max boost longer to heat up the pipe?

 

I may have to tinker with that.

 

Possibly, but how are you going to hold it at max boost that long? You'd have to use a load cell dyno, to keep the engine speed, load, and throttle consistent, or else it's just going to accelerate to redline. Plus, do we know how long it would take to heat soak the tube?

Not saying it wouldn't give you a decent basis, but I think for the most accurate results, you'd need an air temp probe in the air stream. Taking the temp of the pipe could also yield you results that are skewed slightly from the surrounding temp of the engine compartment.

 

couple of rocket science thoughts: the intercooler should show the relatively same temps as the output perhaps less by about 10 degrees. measure the intercooler. top and bottom since I am guessing that would be part of the analysis

heat soak is a function of temp differential, material mass and time alloted. Perhaps 10 minutes for an accurate rise on the boost side. I'm not sure that I want to hold my truck there that long to see.

aircraft can have input temps so high that they fire the fuel in the manifold, so I am thinking JTharvey is once again correct about 400 degrees

ErnestEugene would know and have graphs.