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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
2017 Engine replaced, same issue again. Lengthy write-up
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<blockquote data-quote="OPT PRIME" data-source="post: 1298363" data-attributes="member: 24166"><p>Variable valve timing started around 1960 and Toyota’s VVT dates back to 1991. I believe Fords first experience with this was via the Ford Taurus SHO which had a 215 HP 7,000 RPM 3.0 designed by Yamaha Marine. The reclocking of the cams is handled by a “cam phaser.” </p><p></p><p>Honda’s system (no longer used) was VTEC. VTEC varied in that each camshaft has two distinct profiles. Fingers between the cam loves and valves were activate or disengaged to control which lift profile was in use. </p><p></p><p>Even an OHV V-8 as used by GM (later LT series) have variable cam timing. </p><p></p><p>Very common. Bad cam phasers? Not so much.</p><p></p><p></p><p>[MEDIA=youtube]n8QxuXORD1k[/MEDIA]</p><p></p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="OPT PRIME, post: 1298363, member: 24166"] Variable valve timing started around 1960 and Toyota’s VVT dates back to 1991. I believe Fords first experience with this was via the Ford Taurus SHO which had a 215 HP 7,000 RPM 3.0 designed by Yamaha Marine. The reclocking of the cams is handled by a “cam phaser.” Honda’s system (no longer used) was VTEC. VTEC varied in that each camshaft has two distinct profiles. Fingers between the cam loves and valves were activate or disengaged to control which lift profile was in use. Even an OHV V-8 as used by GM (later LT series) have variable cam timing. Very common. Bad cam phasers? Not so much. [MEDIA=youtube]n8QxuXORD1k[/MEDIA] Sent from my iPhone using Tapatalk [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford F-150 Raptor General Discussions [GEN 2]
2017 Engine replaced, same issue again. Lengthy write-up
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