shogun32
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from article
Doesn't defend going to 8300 but then again it's 2020 now, not 2010 so perhaps the spring's goal posts have been moved considerably since then, especially since they had to do so vis a vis Voodoo.We should specify that for a valvetrain specialist such as John, Boss engine speeds do not end at the production car's 7,500 rpm. "We have a design guide so that if the fuel shut off is 7,500, we want the valvetrain to be stable to 400-rpm over that in case of over-speed events, missed shift on a downshift, or whatever. [This is to] make sure that if there is a momentary over-speed, the valvetrain doesn't come apart. If you throw a rocker arm or bend a valve--and it doesn't take long to do that under the wrong conditions--then you can lose your whole engine." Told that one of the Grand Am racers had managed to wing a RoadRunner to 9,000 rpm on a missed downshift with no apparent damage, Mark's commented, "I can only warranty it to 7,900, but I'm glad it worked!"
So, when Ford says redline is 7,500 rpm, their valvetrain engineers are really aiming closer to 8,000 rpm.
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