As for blocking or not blocking the air to the oil cooler you have three choices. You can use a mesh with a low void area and thus penalize air cooling of the oil 100% of the time the mesh is in place. You can run no mesh and only penalize air cooling of the oil when some object does in fact bend some fins. Or you can run a mesh with a much higher void area that will protect the cooler as well as not present nearly the impedance to air flow. Any mesh will have an effect, but it can be minimized.

By placing a mesh such as that pictured earlier you have already made the cooler operate much less efficiently in the name of "protecting" it. Not a good trade IMO.

I know the tire example is funny but it's true. You're choosing to take the penalty right up front and never allow the system to function properly rather than give it the opportunity to work at least some of the time. You're taking potential performance away from the system 100% of the time in the name of protecting it from something that might happen.

 

cool beans man.

I think a good idea would be to put a wiremesh grille covering the radiator(or is that ur IC?

either way,
a simple wire mesh would work well at preventing any rocks or whatnot from flying up and taking chunks out.

wouldn't hurt so y not?

 

No offense, but you need to read my post a little more carefully. As the speeds increased, the flow obstruction became even greater due to the turbulence the mesh created, which resulted in a loss of almost 3 mph on top, which is a huge difference considering the poor aerodynamics of a motorcycle. Translated over to the oil cooler setup, turbulence would mean far less efficiency from the oil cooler, because the airflow over the fins would be far less (slower).

Turbulence for better heat transfer ("convection") is why oil coolers have "wavy" fins instead of straight fins; they also slow the airflow as it passes through the cooler. But you need as much unobstructed airflow as possible to initially hit the frontal surface of the radiator to get the proper heat transfer benefits, otherwise the already turbulent airflow is too slow to really do much good as it tries to pass through the radiator. And as speed builds, so does the obstructed airflow in front of the mesh; it will "build up" and further obstruct airflow. Imagine if you held a mesh in a fast moving stream; then imagine if you held it in front of a fire hose. You'd probably have a hard time holding it in front of a fire hose going full blast.

 

I never made any such supposition.

I said that "on the other hand, turbulent flow is good for convective heat transfer" and you decided I was too smart for my own good by using a fancy word.

Then you want to demonstrate my stupidity with your analogy.

Think about your analogy: air is supposed to be in tire, let it all out?

WTF?

The proper analogy is let part of the air out.

In some instances, letting the air out so that the air pressure inside a tire is less than optimal is actually beneficial. For example, driving a jeep on sand dunes, most people including this overpaid scribe find that running about 15 psi of air pressure will let one float over the sands.

What I offered in my post is a different view point, not something as stupid as blocking all of the air which the poster clearly demonstrated that it doesn't block.

So you demonstrate your narrow minded absolutist thinking by your black or white example.

At least if you want to use an analogy, do it properly or at the very least, leave it to the professionals.

 

holy sh_t guys, why dont you guys take this thread and ill start ANOTHER thread for my car ducting project :-)

thank you very much (lol)

 

Sorry about that, Damian.

You mean "plumber's tape", right? Let us know how it works out at BIR. I'm especially interested, since you're extending the underpanel to work as a splitter as well.

 

I asked my self a few minets ago, if it was possible to have a free extange of ideas with out ignorance, arrogance and riddicule. That question has now been answered.

 

Damien: can you post pictures of your final product and comments on how well it lasted ?

Thanks,
:-) neil

 

hey neil,
actually I ran that ducting for many track events and it worked great, however I wanted to make it out of better material and make some small tweaks to the design, the new thread on it is here:

https://www.rx7club.com/showthread.p...hlight=ducting