Quote:
Originally Posted by NoHaveMSG
I am confused by the bolded statement. I said I'd test it(air temp off the oil cooler) if I didn't just kill a thermocouple. I don't know what this " then said you didn't" refers to.
Here are all of my posts up to the one you quoted.
The more I think about it, I don't know how useful it would be to your point. I could only measure the air temp coming off the cooler, I can't correlate it to IAT of an intercooled car since I'm not boosted. You could test your point yourself by logging oil temp, ambient, and IAT with and without an oil cooler. Though as I said, it is something I could test though the motivation to do it has dwindled quite a bit. Maybe I will mess around with it later in the year when I work on measuring oil temps and pressures in and out of the cooler. I think a big factor is how close the oil cooler is to the intercooler. The air coming through needs some time to diffuse as well as not radiating heat directly to the intercooler, or obstructing intercooler flow.
Your airspeed comment makes no sense. The oil cooler is an obstruction, the air moving through it is not going 65mph even if the car is. Makes all those numbers worthless. I am sure you could measure the airspeed into the oil cooler and exiting to figure out the pressure drop over the area to calculate the airflow through it, and then calculate the amount of BTU's that volume of air can carry away at that speed, but that sounds like wayyyyy to much work.
Brake ducts can be built and mounted however, even if the OP's car is a full on race car it is not going to be an issue no matter where the oil cooler or intercooler goes. Why mention it? Not an obstacle. You come across as only mentioning it when it suits your argument.
Reading the OP's previous posts, I am not sure I would be concerned with his usage. Especially if he is not commenting on it. Not a dig at him, he just seems new to the modding game with his previous threads and from the sounds of it doesn't track his car. |
You’re right that there would be a decrease in speed of the air, and it would create a low pressure zone behind the oil cooler, and you’re right that I didn’t include/consider that into my calculations. I’m thinking there are many factors like the thickness of the core and density of the core that would change the rate of air flow through the cooler. Still, I would like to see some real data and not just conjecture. If the delta isn’t great, if fresh air can get between the heat exchangers because of a high pressure area around a low pressure area, if the frontal area of the cooler isn’t significant enough in size to cause a change in IATs, if the circumstances that warrant concern are only in the most extreme applications, etc, then there may be no reason to justify divorcing all the exchangers.
I mention the brake ducts because there is only so much frontal area to gather incoming air to feed a radiator, oil cooler, trans cooler, AC, intercooler, brake system, air intake, etc., and as it pertains to a SMIC or oil cooler, the space is often needing to be shared with the brake ducts or a CAI or whatever. It also makes for short and direct routing. In race applications, a bump to the corner might cause damage to the oil cooler too, but a crash bar in the front usually protects the exchangers in front. Of course someone can make it work if they want. My point is to being in all the necessary elements into the conversation depending on the setup. No point in only addressing one thing when moving X can effect Y.
With regards to your final paragraph, that is my suspicion too, but I’m curious what application he thinks requires such considerations. If it isn’t clear, my threshold for such considerations is high, so if I’m mistaken then I’m interested in learning where I went wrong with my thinking.