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SportTrac Discussion
Engine & Drivetrain
5.3L Engine Swap
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<blockquote data-quote="blksn8k" data-source="post: 1029964" data-attributes="member: 64142"><p>Train,</p><p></p><p></p><p></p><p>Thanks and yes I am on FB. </p><p></p><p></p><p></p><p>That sounds like a good deal but as 08sta said it does not sound like it will accept 3V heads. Anything other than 3V heads means you are going to have to mess with the exhaust. </p><p></p><p></p><p></p><p>Unless you want to go with Trick Flow 2V or Cobra 4V heads with custom exhaust and/or forced induction you probably would not see much of a performance gain. The 5.3 from FP will accept 3V heads and you are gaining 42 cu in plus a balanced bottom end just as strong as the Shrader 283. </p><p></p><p></p><p></p><p>Even if Shrader was willing to put a 3.75" crank in their Cobra block you can't ever get to 5.3L because those blocks do not have siamesed bores and cannot be enlarged to 3.701" like the FP BOSS 5.0 block that comes with the 5.3. </p><p></p><p></p><p></p><p>Whatever money you saved on the Shrader engine would probably be spent on exhaust and other mods to make non 3V heads work and you would not be gaining much power, if any, over the 5.3.</p></blockquote><p></p>
[QUOTE="blksn8k, post: 1029964, member: 64142"] Train, Thanks and yes I am on FB. That sounds like a good deal but as 08sta said it does not sound like it will accept 3V heads. Anything other than 3V heads means you are going to have to mess with the exhaust. Unless you want to go with Trick Flow 2V or Cobra 4V heads with custom exhaust and/or forced induction you probably would not see much of a performance gain. The 5.3 from FP will accept 3V heads and you are gaining 42 cu in plus a balanced bottom end just as strong as the Shrader 283. Even if Shrader was willing to put a 3.75" crank in their Cobra block you can't ever get to 5.3L because those blocks do not have siamesed bores and cannot be enlarged to 3.701" like the FP BOSS 5.0 block that comes with the 5.3. Whatever money you saved on the Shrader engine would probably be spent on exhaust and other mods to make non 3V heads work and you would not be gaining much power, if any, over the 5.3. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
5.3L Engine Swap
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