Flyin` Miata V8 radiator and hose kit
Based on our excellent crossflow radiator, this twin-pass setup was designed specifically to mate with the LSx V8 engines. The inlet and outlet are on the same side of the radiator and are the appropriate sizes for the big V8s. There`s also a fitting for the steam vent. The twin-pass design makes it very efficient as well. Fits all 1990-05 Miatas.
In order to test the Miata`s cooling system, we built a special rig for our dyno. We used it to run a Miata engine at a set load for hours at a time. We tested stock radiators. We tested custom-built crossflow radiators. We tested dual pass radiators. We tried fin densities from 10 to 24 fins per inch, core thicknesses ranging from 16 to 56 mm and fin widths from 6 to 10 mm.
Read more about the radiator testing.
This is the result.
The final design is a cross flow. This means that instead of having the coolant run from a tank at the top of the radiator to the bottom, it moves from one side to the other. The longer tubes mean the coolant is able to transfer more heat to the ambient air.
But there`s more going on here than just turning the core sideways. The core also has a fairly high fin density, giving a greater surface area for the heat transfer. Most importantly, our fin width is fairly narrow which means more tubes per inch. Due to this efficient core, we were able to use a thinner design. The end result is improved cooling under all circumstances. Mate it with our V8-specific airflow kit and you`ll maximize the ability of your radiator to shed heat.
We also designed the radiator to fit all 1990-05 Miatas with only a small variation to mount the different fan designs. The drain plug is in the left side tank, integrated into one of the mounting bosses so you can use the factory access flap and drain the radiator without pulling the engine undertray. A new 16 psi radiator cap is included, and you can use any cap designed for a Miata.
Includes radiator hoses and clamps to connect to an LS engine with the water pump outlet on the driver`s side. If you have an older engine with the outlet on the passenger`s side, contact us for different hoses. You can also replace your water pump with a new one that has the driver`s side outlet, not a bad idea on a used engine.
Built in the US, two year warranty.