Fabs, (or anyone else for that matter), do you have the August 1979 issue of HotVW's? Page 42-43, if you could scan it please?
I've always been been intriged by Jim Feuling. The man built a W3 Harley motor that was similar to a radial engine, a turbocharged Oldsmobile 4 cylinder making nearly 1200hp, and more importantly for us a 2232cc (92x84) ACVW engine with his own 16 valve cylinder heads, one venturi per
valve, and anti-reversionary exhaust. This mill is reported to have produced 470hp on alcohol,
naturally aspirated.
But for now I am curious to learn about this anti-reversionary exhaust "technology" in the previously mentioned HotVW's.They take the closest look at this technology that I have ever seen, but it still leaves much to be desired! It works by reducing the amount of exhaust that is pulled back into the combustion chamber during the beginning of the intake cycle during valve overlap. Naturally, the larger the cam, the more benificial it is. Claims were 25% increase in power at 2500rpm and 12.5% at 5500rpm. That's something that I could get on board with!
What do the VW engine experts think about this? Does it work? Or was Feuling a crack pot?!