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New Edge Cobras
'03 Cobra Break-In Recommendations
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<blockquote data-quote="Cobra'03" data-source="post: 93730" data-attributes="member: 3013"><p>There are some engineering realities to both opinions int his thread:</p><p></p><p>1) Varying the engine speed will help the rings seat well and given better oil control later in engine life. I would recommend normal highway speeds and rowing the shifter now and then - run in 4th for a while, then 6, then 5, even 3rd. Mix it up.</p><p></p><p>2) Brakes definitely need break-in. They "out gas" volatiles in the first few hundred miles, and if you heat 'em up too fast, these gases will condense on the rotors, leaving a slippery film. I recommend suburban stop and go - cruise a mile, then a moderate stop, let em cool at the light, then repeat. Within 50-100 miles, they will be perfectly good to go.</p><p></p><p>3) The run it like you plan to drive it means the engine will losen up faster, but may affect long-term reliability. Racers want the car to be loose, as they need every bit of power, and re-build frequently. Modern cars have many disimilar metals - chrome on the rings, soft metals below, iron and aluminum blocks, aluminum heads. Each metal expands at a different rate, and early on, even with the improved machining of today's engine builds, there is still a lot of non-blueprinted "seating" of metal parts, as they engines "get friendly".</p><p></p><p>I for one plan to defer instant gratification for long-term stability (but hell, I did not screw the prom queen either).;-)</p></blockquote><p></p>
[QUOTE="Cobra'03, post: 93730, member: 3013"] There are some engineering realities to both opinions int his thread: 1) Varying the engine speed will help the rings seat well and given better oil control later in engine life. I would recommend normal highway speeds and rowing the shifter now and then - run in 4th for a while, then 6, then 5, even 3rd. Mix it up. 2) Brakes definitely need break-in. They "out gas" volatiles in the first few hundred miles, and if you heat 'em up too fast, these gases will condense on the rotors, leaving a slippery film. I recommend suburban stop and go - cruise a mile, then a moderate stop, let em cool at the light, then repeat. Within 50-100 miles, they will be perfectly good to go. 3) The run it like you plan to drive it means the engine will losen up faster, but may affect long-term reliability. Racers want the car to be loose, as they need every bit of power, and re-build frequently. Modern cars have many disimilar metals - chrome on the rings, soft metals below, iron and aluminum blocks, aluminum heads. Each metal expands at a different rate, and early on, even with the improved machining of today's engine builds, there is still a lot of non-blueprinted "seating" of metal parts, as they engines "get friendly". I for one plan to defer instant gratification for long-term stability (but hell, I did not screw the prom queen either).;-) [/QUOTE]
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