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how to 4valve a s197
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<blockquote data-quote="Ben99GT" data-source="post: 6899722" data-attributes="member: 3519"><p>WTF are you talking about, 3V heads do not flow nearly as well as 4V heads. </p><p></p><p>What's funny is that I keep reading on all these message boards "3V heads flow nearly as well as 4V heads," or "3V heads outflow 4Vs heads." But the real kicker is that a set of SVO <strong>2V</strong> heads outflow 3V heads above .550 lift.</p><p></p><p>3V heads are down by a good 40 cfm on the intake and 30 cfm on the exhaust side to a set of '03 Cobra heads, and the 4V head outflows the 3V head at every lift point from .050" to beyond .600" lift. With porting the gap only gets bigger. </p><p></p><p>Funny how one apples to oranges test performed by Kenne Bell turns into the 3V magically responding better to boost. I hope you people do realize that test compared dyno graphs from years apart (tuning is always progressing), the 3V had the superior blower and over a point more compression and still only made the about the same power.</p></blockquote><p></p>
[QUOTE="Ben99GT, post: 6899722, member: 3519"] WTF are you talking about, 3V heads do not flow nearly as well as 4V heads. What's funny is that I keep reading on all these message boards "3V heads flow nearly as well as 4V heads," or "3V heads outflow 4Vs heads." But the real kicker is that a set of SVO [B]2V[/B] heads outflow 3V heads above .550 lift. 3V heads are down by a good 40 cfm on the intake and 30 cfm on the exhaust side to a set of '03 Cobra heads, and the 4V head outflows the 3V head at every lift point from .050" to beyond .600" lift. With porting the gap only gets bigger. Funny how one apples to oranges test performed by Kenne Bell turns into the 3V magically responding better to boost. I hope you people do realize that test compared dyno graphs from years apart (tuning is always progressing), the 3V had the superior blower and over a point more compression and still only made the about the same power. [/QUOTE]
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