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New Edge Cobras
01 cobra heads -vs- 03 Mach 1 heads
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<blockquote data-quote="na svt" data-source="post: 9090812" data-attributes="member: 35346"><p>The stock 99/01 or 96-98 cams probably would have made more power.</p><p></p><p>It does look like the 03/04 heads outperformed the 99/01 heads when just looking at the dyno graph, but there are a lot of variables in the heads that could result in mroe or less power. Those are combustion chamber size, valve sealing, and lash adjuster preload. A good valve job alone can increase over totally stock heads. Were the 99/01 heads fresh? Were the 03/04 heads milled? Then there are the dynos, they were done a year apart. The tune itself could have had more or less timing, a/f could have been more lean or rich, etc.</p></blockquote><p></p>
[QUOTE="na svt, post: 9090812, member: 35346"] The stock 99/01 or 96-98 cams probably would have made more power. It does look like the 03/04 heads outperformed the 99/01 heads when just looking at the dyno graph, but there are a lot of variables in the heads that could result in mroe or less power. Those are combustion chamber size, valve sealing, and lash adjuster preload. A good valve job alone can increase over totally stock heads. Were the 99/01 heads fresh? Were the 03/04 heads milled? Then there are the dynos, they were done a year apart. The tune itself could have had more or less timing, a/f could have been more lean or rich, etc. [/QUOTE]
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01 cobra heads -vs- 03 Mach 1 heads
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