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New Edge Cobras
03-04 cobra short blocks?
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<blockquote data-quote="SlowSVT" data-source="post: 13363302" data-attributes="member: 20202"><p>The coyote motor design started from a clean sheet and takes into account the longer stroke. Pushing the 4.6 beyond the original design intent does not which puts the wrist pin into the oil ring, pulls .250" more of what precious little skirt is left in the cylinder and aggravates the rod/stroke ratio. To be honest even the Coyote motor is likely to have made compromises to maintain the same deck height with the 4.6. This motor is packaged very tight with the pistons just clearing the crank throws. As a design engineer I know when you're in that situation any change tends to have a ripple effect along a whole series of components and you end up "robbing Peter to pay Paul". There a compromises built into just about every motor ever made you just want to start with one which have the fewest.</p><p></p><p>What I was getting at with the OP is a bigger bore is usually a better way to gain displacement which does not effect on the bottom end geometry. Lots of stroked 4.6 are running around without problems but they are certainly more susceptible to having them vs. a stock stroke mill.</p></blockquote><p></p>
[QUOTE="SlowSVT, post: 13363302, member: 20202"] The coyote motor design started from a clean sheet and takes into account the longer stroke. Pushing the 4.6 beyond the original design intent does not which puts the wrist pin into the oil ring, pulls .250" more of what precious little skirt is left in the cylinder and aggravates the rod/stroke ratio. To be honest even the Coyote motor is likely to have made compromises to maintain the same deck height with the 4.6. This motor is packaged very tight with the pistons just clearing the crank throws. As a design engineer I know when you're in that situation any change tends to have a ripple effect along a whole series of components and you end up "robbing Peter to pay Paul". There a compromises built into just about every motor ever made you just want to start with one which have the fewest. What I was getting at with the OP is a bigger bore is usually a better way to gain displacement which does not effect on the bottom end geometry. Lots of stroked 4.6 are running around without problems but they are certainly more susceptible to having them vs. a stock stroke mill. [/QUOTE]
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