Try some motorcycle radiator fans. I have two or three that I will be using on my car. I will also use one of them for my future intercooler.
The are like 3" X 3" to 5" X 5" depending on make and model. They push or pull alot of air for their size. Check ebay for some used ones.
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I love my money pit, uhm, err, I mean my car.
1969 beetle in the works... 2.0 type 4 DTM...
2004 Suzuki GSX-R 1000
crashed
www.volksport.net Volksport Kfer Gruppe