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The Terminator
Terminator Talk
Need advice for a new shortblock for 03 cobra
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<blockquote data-quote="tt335ci03cobra" data-source="post: 16127988" data-attributes="member: 68944"><p>I would defer to their wisdom. </p><p></p><p>My opinion* or course of action based on what you describe would be assuming 500-550whp so I would build a 650whp capable assembly for added safety.</p><p></p><p>~9.5/1 compression </p><p>•spring for an Ibeam rod to save a little weight.</p><p>•only do a big bore/stroker from a company like Livernois. Even the ford strokers and big bores have seen failure (from what I researched in 2014/15) from rod ratio and piston slap. This is when the skirt of the piston leaves the bottom of the block at bottom dead center. It’s bad.</p><p>•fuel look into 55# or 60# injectors</p><p>•consult with the builders I recommended and compare notes. Honestly, they’ll save you time </p><p></p><p></p><p>Optional just for efficiency and ability to run lower boost.</p><p></p><p>•port the heads stage 2 port/polish while they off. </p><p>•stage 2 blower cam especially if you can find them used. It’ll be expensive to do this though, plan on $3500... but you’ll be able to run lower boost which prolongs the life of the motor. </p><p></p><p>Boost is a representation of restriction. You could run a 3.0 pulley so as not to stress the components and still make more power than a 2.6 or 2.8 pulley stock head/cam car.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 16127988, member: 68944"] I would defer to their wisdom. My opinion* or course of action based on what you describe would be assuming 500-550whp so I would build a 650whp capable assembly for added safety. ~9.5/1 compression •spring for an Ibeam rod to save a little weight. •only do a big bore/stroker from a company like Livernois. Even the ford strokers and big bores have seen failure (from what I researched in 2014/15) from rod ratio and piston slap. This is when the skirt of the piston leaves the bottom of the block at bottom dead center. It’s bad. •fuel look into 55# or 60# injectors •consult with the builders I recommended and compare notes. Honestly, they’ll save you time Optional just for efficiency and ability to run lower boost. •port the heads stage 2 port/polish while they off. •stage 2 blower cam especially if you can find them used. It’ll be expensive to do this though, plan on $3500... but you’ll be able to run lower boost which prolongs the life of the motor. Boost is a representation of restriction. You could run a 3.0 pulley so as not to stress the components and still make more power than a 2.6 or 2.8 pulley stock head/cam car. [/QUOTE]
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Need advice for a new shortblock for 03 cobra
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