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Lightning Forums
SVT F-150 Raptor
5.4L and 6.2L Engine/Tuning and Performance Upgrad
3v Expedition aiming for 10's
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<blockquote data-quote="kevinatfms" data-source="post: 16824027" data-attributes="member: 39344"><p>When i did cams in my 3 valve with FRPP heads it required some heavy duty valve springs and retainers but i believe utilized the VCT system with some tuning to limit the amount of cam timing changes.</p><p></p><p>It didnt make a ton of power for a heads, cams, full bolt on 4.6 3 valve - 358rwhp on a Mustang dyno. Car would run neck and neck with a H/C/I 2012 Camaro SS though so it had some "Get up and go" to it.</p><p></p><p>I know they have the lock outs but ive never ridden in a "maxed out" 3 valve with them installed. I kind of wonder if just going to a set cam profile would benefit the car over the variable cam timing in terms of outright performance. Lose all of the lower end for max up top power?</p></blockquote><p></p>
[QUOTE="kevinatfms, post: 16824027, member: 39344"] When i did cams in my 3 valve with FRPP heads it required some heavy duty valve springs and retainers but i believe utilized the VCT system with some tuning to limit the amount of cam timing changes. It didnt make a ton of power for a heads, cams, full bolt on 4.6 3 valve - 358rwhp on a Mustang dyno. Car would run neck and neck with a H/C/I 2012 Camaro SS though so it had some "Get up and go" to it. I know they have the lock outs but ive never ridden in a "maxed out" 3 valve with them installed. I kind of wonder if just going to a set cam profile would benefit the car over the variable cam timing in terms of outright performance. Lose all of the lower end for max up top power? [/QUOTE]
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SVT F-150 Raptor
5.4L and 6.2L Engine/Tuning and Performance Upgrad
3v Expedition aiming for 10's
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