How far could you take (hp) an I4 while keeping it NA?
So I'm thinking different cams, pistons, heads, tune, etc.How and how much hp could you make NA from a Ford Focus I4?Let's say the octane limit is 93 US 0% ethanol and we don't care mpgs, we want power. via /r/cars http://ift.tt/2t3DFIN
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