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SVT Shelby GT500
3V 4.6 for next mustang
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<blockquote data-quote="rhumbline" data-source="post: 321422" data-attributes="member: 7720"><p>I was thinking that a very Hi-Po version of the 3.9 V8 would make an interesting Boss motor, one that would inhabit a very similar niche as did the Boss 302 in its day, i.e. a smallish, light, more modern V8 tuned more for high rpm performance relative to the other larger motors then available (351, 390, 428). Where the Cleveland 4bbl headed 302 fit that description in '69-'70, so might the 3.9 (or the 4.2 version) do so in todays lineup against the bigger, if slightly lower tech Mod motors (4.6, 5.0(?), 5.4). </p><p></p><p>The Mach I, then as now, would inhabit a slightly lower tech, lower rev, higher torque segment emphasizing standing start acceleration whereas the Cobra might be more like the Boss 429 was, though the Boss 429 really only came alive at higher revs too, once you replaced the smallish 780cfm carb that is. The 428's would usually eat them up on the street being a more tractable motor at less than race revs.</p></blockquote><p></p>
[QUOTE="rhumbline, post: 321422, member: 7720"] I was thinking that a very Hi-Po version of the 3.9 V8 would make an interesting Boss motor, one that would inhabit a very similar niche as did the Boss 302 in its day, i.e. a smallish, light, more modern V8 tuned more for high rpm performance relative to the other larger motors then available (351, 390, 428). Where the Cleveland 4bbl headed 302 fit that description in '69-'70, so might the 3.9 (or the 4.2 version) do so in todays lineup against the bigger, if slightly lower tech Mod motors (4.6, 5.0(?), 5.4). The Mach I, then as now, would inhabit a slightly lower tech, lower rev, higher torque segment emphasizing standing start acceleration whereas the Cobra might be more like the Boss 429 was, though the Boss 429 really only came alive at higher revs too, once you replaced the smallish 780cfm carb that is. The 428's would usually eat them up on the street being a more tractable motor at less than race revs. [/QUOTE]
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3V 4.6 for next mustang
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