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On my RV-8, the placement of the turbo blocks the 'traditional' left cheek radiator position, so I placed both 1989 Chev PU evap cores,( 3/4" od tubes, the outlet already was) on the right side, hot water entering the top, crossflow, and cool water exiting the bottom, like cars do. I mounted them side by side with the fwd one slightly higher so the hoses would pass the coolers, and as near the right side of the cowl as I could get it, and as far forward. It's plainly visible on my youtube first start vid.
I figured that the cowl is widest right at the front, so the prop blast creates a vacuum down the cowl sides. I plan to build air diffusers inside the cowl to increase pressure, then aft facing 'scoops' on the outside of the cowl to cause the accelerated prop blast to 'educt' air out of the radiator cores. So I'm hoping to pump the air in and suck it out. Kind of like Ed A's, or airflow the Opposite of Tracy's RV-8...
Also, I'm hoping that the cowl diffusers will be fairly straight so I can stay close to the idealized divergent angle for as far as possible, at least on the right side.
The diffuser on the left side must clear the turbocharger air filter and provide it air at the same time.
If I have to I will build diffusers directly to the radiators and oil cooler, but I am hoping to work this out with a true pressure cowl. I think it would give better access to the engine and better 'surface cooling' especially the turbocharger and manifold.
Scott
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