I installed this radiator on my stock '04 last year, with aircon and stock fan shrouds.

Both fan shrouds had to be trimmed a bit to fit (it's obvious once they're laying in place,), and the condenser mount has to be moved slightly forward, for which hardware is included. The instructions cover this, and it's important to read them carefully, as I missed a step the first time around and was wondering why I had some rubbing. After I re-read the instructions, it worked perfectly.

Here's a photo of mine from just before I installed it back into the car. I've highlighted in red the cuts I made to the OEM fan shrouds.
https://cimg7.ibsrv.net/gimg/www.mia...a09d7f5328.png

Don't forget the most important part:

I got your back, fam.

FWIW, I ran a $90 ebay radiator for a whole year at 350 whp with AC and no ducting with ZERO overheating. I never saw more than 210* even at the drag strip running mid 11's at 121 mph.

Hell my race car runs the same rad with only the OEM bumper duct and no undertray and no reroute and I have never seen it hot either on track.

No reason to overthink this...

now did you cut/past or copy/paste?

Maybe I used the wrong term, but point is to focus on how much and how fast coolant is coming into contact with rad core and in turn, how much air mass is coming into contact with that core.

conduction

[kuh n-duhk-shuh n]ExamplesWord Origin
See more synonyms for conduction on Thesaurus.comnoun

1. the act of conducting, as of water through a pipe.
2. Physics.
   1. the transfer of heat between two parts of a stationary system, caused by a temperature differencebetween the parts.
   2. transmission through a conductor.
   3. conductivity.
3. Physiology. the carrying of sound waves, electrons, heat, or nerve impulses by a nerve or other tissue.

Thanks for the input, everyone. Ordered the reroute kit and the Supermiata crossflow earlier today.

Good choice. You will be very happy with that purchase. Everything Emilio sells is top notch stuff and he stands by his product.

OK fine. Let's get technical then. Forced convection is what we are talking about since the fluids (air and water) are being forced through the radiator (water pump for the water and a fan or vehicle movement for the air).

That said, at the point where the heat is being transferred from the water to the aluminum to the air, it's conduction. Surface area is what counts.

It's after the fact and I agree with OPs choice. I've got a Koyo Hyper on the turbo daily, and Emilio's crossflow on the track car. The big benefit of the Koyo is that it is completely plug-and-play and cools well. I got it before Emilio's crossflow was available.

But Emilio's crossflow is fantastic. I saw a 15-20 degree drop in on track temperatures vs. a Ron Davis (itself considered a decent radiator). It may even be better than that because I always end up at the thermostat temperature, so there is still excess cooling even when air temperatures exceed 100F. It's also nicely configured for a reroute hose. Only downside is minor fab required as Joe pointed out. Very minor.

Also, as OP discovered, the OEM temperature gauge lies on purpose. You can get up to 215 to 220 before it starts budging from the middle. This prevents warranty returns. If you ever see that gauge indicate hot, it means it!

​​​​​​Also, since it seems like we're being "that guy", that first definition is both poorly worded and a rather confusing choice as, by definition, water flowing through a pipe would be considered forced convection, not conduction, in the world of heat transfer.

That definition was just an online dictionary/thesaurus. It wasn't a technical definition. I think we all get the gist.

You said it not me! (*inset We Didn't Start the Fire soundtrack*)

To cover my ass I'll start by saying that the, by far, most useful data in regards to application specific effectiveness is the empirical data you and Emilio so kindly provided. That being said, the ocd-elf inside me can't not mention the incorrect and/or ill-explained physics in your last post.

The only significant conductive heat transfer (HT) occurring in a radiator is in the path heat must take to go from the inner wall of the (most likely) aluminum tubes to the outer wall/fins (of the same tube). In terms of circuit analogs, the resistance to the transfer of heat in the conduction through the the relatively thin aluminum is many orders of magnitude less than the resistance to HT which is inherent in both the coolant-tube interaction and the tube-air interaction (although in most cases it is the tube-air HT which plays the limiting role in the cooling power of a radiator) for any given temperature delta. This is why everyone makes such a big deal out of construction type and presence of turbulators (or any feature designed to trip free-stream air flow into turbulent reynolds number regimes for enhanced convective HT).

All heat transfer scales with area (conduction, convection , or radiation), this is just how the physical phenomena are described from first principles (e.g. you need to solve surface integrals to find heat transfer of a 2D or 3D object). The important consideration is really, which HT surface area do I maximize? The answer to this question, give the relative heat capacity and density of water vs. air and thin film effects, is almost always the fins/tubes which allow for convective HT between radiator and air (and, if not, the answer is usually the other convective process between coolant and radiator)

Source:
this paper from 1930 about radiators Sci-Hub | Heat transfer in automobile radiators of the tubular type | 10.1016/0735-1933(85)90003-X
this paper on copper nanoparticle doped coolant in radiators Sci-Hub | Experimental Study of Heat Transfer of a Car Radiator with CuO/Ethylene Glycol-Water as a Coolant | 10.1080/01932691.2013.805301
2.5 degrees in mechanical engineering focused on a completely unrelated area.

Where do I buy the nanoparticle coolant?!?!?!
Also, nice explanation :) as I read it I was thinking "huh this person definitely has at least 1 more mechanical engineering degree than me!"

FTFY.

It's probably only good for internet arguments but gotta justify those loans somehow.

Also be warned it's a little pricey: https://www.sigmaaldrich.com/catalog...g=en&region=US

all this talk of cooling and no one even mentioned the hyper re-route

Especially since Spiff mentioned an elf.

Why is this conducting, convecting thing called a Radiator?