I had a forward facing WRX scoop on the V8 Deisel Defender I used to own.

It didn't do much to help the cooling issues. I ended up cutting holes in the inside wheel arches, 9 each side, with a 52mm hole saw.

This improved it a little. I think what was occuring was a pressure lock in the engine bay, caused by the scoop (facing forward) The holes in the wheel arches helped to relive the pressure I guess.

I would definetly have the scoop facing backwards if I was going to do it again.

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Cheers

Mick

1985 Land Rover 110 County 3.9 V8

1971 Land Rover 88 Series 2A 2.25 Diesel