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<blockquote data-quote="tt335ci03cobra" data-source="post: 16224123" data-attributes="member: 68944"><p>It mostly all applies to supercharged or na/nitrous too. In general, a very free flowing engine will have almost no torque down low but will sing and live nicely at higher rpm. </p><p></p><p>Thing is engine life at 8000rpm is laughable. You probably can realistically assume an engine will last from about 10,000,000 revolutions to maybe 100,000,000 revolutions. </p><p></p><p>Spinning at 8,000rpm very often will limit engine life dramatically. </p><p></p><p>Diesel truck engines can last a million plus miles with maintenance because they barely touch 3,000 rpm.</p><p></p><p>Wrist pins and rings will fail much quicker with high rpm. This is why bullet bike engines last like 15,000 miles, maybe 30.</p><p></p><p>For longevity, stage 1 and 2 head work is ideal with about 7500rpm redline, maybe 8000. </p><p></p><p>With my stage 3 head and cam, I have power to 8500 if I want to rev that high, but I honestly shift between 7000-8000 on the street. Most of the time I’m shifting by 5-6500 if I’m in a canyon or mountain driving semi aggressive.</p><p></p><p>Heat management is the number one concern after proper fluids etc. If your car isn’t setup to handle the heat of 800whp, don’t do back to back wot pulls until it is. You can blast off a mid 9 pass but give it cool down time and run the fans until the temps come down, engineer heat exchangers and coolers into the build as time allows.</p><p></p><p>I’ve got oil, trans, and a diff cooler built up for my 03, makes a HUGE difference.</p></blockquote><p></p>
[QUOTE="tt335ci03cobra, post: 16224123, member: 68944"] It mostly all applies to supercharged or na/nitrous too. In general, a very free flowing engine will have almost no torque down low but will sing and live nicely at higher rpm. Thing is engine life at 8000rpm is laughable. You probably can realistically assume an engine will last from about 10,000,000 revolutions to maybe 100,000,000 revolutions. Spinning at 8,000rpm very often will limit engine life dramatically. Diesel truck engines can last a million plus miles with maintenance because they barely touch 3,000 rpm. Wrist pins and rings will fail much quicker with high rpm. This is why bullet bike engines last like 15,000 miles, maybe 30. For longevity, stage 1 and 2 head work is ideal with about 7500rpm redline, maybe 8000. With my stage 3 head and cam, I have power to 8500 if I want to rev that high, but I honestly shift between 7000-8000 on the street. Most of the time I’m shifting by 5-6500 if I’m in a canyon or mountain driving semi aggressive. Heat management is the number one concern after proper fluids etc. If your car isn’t setup to handle the heat of 800whp, don’t do back to back wot pulls until it is. You can blast off a mid 9 pass but give it cool down time and run the fans until the temps come down, engineer heat exchangers and coolers into the build as time allows. I’ve got oil, trans, and a diff cooler built up for my 03, makes a HUGE difference. [/QUOTE]
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