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The Terminator
Engine/Tuning
5.4 4v navigator shortblock question
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<blockquote data-quote="EvilTwins" data-source="post: 6970111" data-attributes="member: 62345"><p>Well as said before the 5.4 has a taller deck height than the 4.6 block so that creates quite a few problems. The heads will be higher in the engine bay and as said before this will make it impossible for any 4.6 intake manifold to work. Luckily for those interested KarKraft do make a product that will resolve this issue.</p><p></p><p><img src="http://www.karkraft.com/54%20flanges1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>5.4 4valve Billet Aluminum Adaptors to install 4.6 4valve Intake Systems!</p><p>That's Right!!! You can now install your 1999-2004 4.6 Cobra, Aviator or Marauder EFI Intake System on a 5.4 4valve Navigator Long Block! Made from 6065 T6 billet aluminum. includes new hardware $369.95</p><p><a href="http://www.karkraft.com/new_page_9.htm" target="_blank">http://www.karkraft.com/new_page_9.htm</a></p><p></p><p>Having to use these adapter flanges on an engine thats already wider and taller means that the intake manifold is going to be much higher than it was with the 4.6, no way the stock hood will work.</p><p></p><p>One thing I'm still unsure is the differences in the exhaust flange style and location for the 5.4 vs. the 4.6. I remember it being said that it is different so something custom may have to be done here?</p><p></p><p>Anyways to answer your original question "How much rwhp could a DOHC 4V Navigator bottomend hold?"</p><p></p><p>Not as much as the stock terminator bottom end. The bottom end in the terminator is all forged and is very strong. It makes no sense to put a bone stock navigator bottom end into a terminator because I can't see it being good for as much as what was there originally.</p><p></p><p>You should really go into detail about what your plans are as that will help us help you.</p></blockquote><p></p>
[QUOTE="EvilTwins, post: 6970111, member: 62345"] Well as said before the 5.4 has a taller deck height than the 4.6 block so that creates quite a few problems. The heads will be higher in the engine bay and as said before this will make it impossible for any 4.6 intake manifold to work. Luckily for those interested KarKraft do make a product that will resolve this issue. [img]http://www.karkraft.com/54%20flanges1.jpg[/img] 5.4 4valve Billet Aluminum Adaptors to install 4.6 4valve Intake Systems! That's Right!!! You can now install your 1999-2004 4.6 Cobra, Aviator or Marauder EFI Intake System on a 5.4 4valve Navigator Long Block! Made from 6065 T6 billet aluminum. includes new hardware $369.95 [url]http://www.karkraft.com/new_page_9.htm[/url] Having to use these adapter flanges on an engine thats already wider and taller means that the intake manifold is going to be much higher than it was with the 4.6, no way the stock hood will work. One thing I'm still unsure is the differences in the exhaust flange style and location for the 5.4 vs. the 4.6. I remember it being said that it is different so something custom may have to be done here? Anyways to answer your original question "How much rwhp could a DOHC 4V Navigator bottomend hold?" Not as much as the stock terminator bottom end. The bottom end in the terminator is all forged and is very strong. It makes no sense to put a bone stock navigator bottom end into a terminator because I can't see it being good for as much as what was there originally. You should really go into detail about what your plans are as that will help us help you. [/QUOTE]
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5.4 4v navigator shortblock question
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