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I know this looks like pure engine mythology, but the website doesn't have any test data. The test data was done by other companies.
Anyhow, the problem with a carbureted or throttle body engine is that the air/fuel mixture has a long way to go before reaching the cylinders. That allows the liquid fuel droplets to colect and fall out of suspention, which creates large unburnable droplets of fuel. Carbureted and throttle body (even port fuel injected engines to a degree) use intake design and heat to help atomize the fuel. For an example, a lot of guys go try to get better power, and sometimes think the'll get better fuel mileage too, by putting on larger diameter intakes and by porting and polishing the heads. The fact is that the larger diameter slows down the intake charge velocity which allows more fuel to fall out of suspention. And the polished surfaces don't help fuel that's fallen out of suspention to reenter the air stream.
Heat is another factor. Ideally, the whole intake charge would be one homogenous gas (ya, ya, I know, then there's the not so fully homogenous stratified charge). On a lot of engines, the hotter the intake manifold is the richer the O2 gauge reads. Not that it's running richer, it's still pulling the same amount of fuel and air, but it's evaporating more fuel so more fuel burns and takes out more oxygen out of the exhaust. So therefore the O2 gauge reads richer.
It's obvious that surfaces do matter. I don't know if this thing really will help being it's so close to the begining of the intake. Supposedly it should help create smaller fuel droplets and add more heat to the fuel. I have thought of maybe instead taking copper plates to use as intake manifold to head gaskets and cutting a jagged edge on the inside to promote flinging fuel drops back into the air stream. One guy I know cuts a ledge around the intake port just before the valve seat for the same reason.
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