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SN-95 and New Edge Mustangs
Question regarding max power on stock bottom end
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<blockquote data-quote="5rand0n7" data-source="post: 16149390" data-attributes="member: 175870"><p>I have a stock longblock 4.6 2v that makes 404whp/397wtq on a dynojet. It has a vortech v3si with a 3.33" pulley and is air-to-air intercooled. Mine makes 10psi at 6k rpm and just shy of 12psi if I rev it out to 6500rpm. Timing is at 16 degrees and I run 92 e10 in the gas tank. I've had it this way for at least 3 summers now and drive it a mixture of all types of driving (slow/easy & fast/hard). It's been to the drag strip once with the blower setup on it and ran a 12.7 @ 113mph in the 1/4 mile. By the way, this was full weight on street tires with a terrible 60' in my defense. </p><p></p><p>I'm a firm believer it's more dependent on the amount of boost and how it comes on for reliability of the bottom end. Also, the tune is obviously the most important part. I'd say around 10-12psi is the best range for power and reliability (if we're talking stock longblock - i.e. bottom end, stock cams, etc.). The power it makes on that amount of boost is what it is - usually around 400whp. I've read and agree that revving it past 6k rpm is riskier too. I've been shifting mine at 6500rpm for 3 Summers now and it's been fine though. If I wanted to make more power, I would do a set of blower cams and install my fuel system. That could potentially get me to 450-500whp. I'd be okay with that. If the tune looked good and it ran good, send it if you can afford a new engine. </p><p></p><p>As for the hp/tq numbers on which dyno... I think it's more common to find a dynojet than a Mustang dyno. I'd say the 400-450whp safe limit is referring to a dynojet. Also, keep in mind that shops with dynos will sometimes skew their numbers or be different depending on factors such as temperature, elevation, etc. You'll hear that the track times determine how fast you are, not the dyno.</p></blockquote><p></p>
[QUOTE="5rand0n7, post: 16149390, member: 175870"] I have a stock longblock 4.6 2v that makes 404whp/397wtq on a dynojet. It has a vortech v3si with a 3.33" pulley and is air-to-air intercooled. Mine makes 10psi at 6k rpm and just shy of 12psi if I rev it out to 6500rpm. Timing is at 16 degrees and I run 92 e10 in the gas tank. I've had it this way for at least 3 summers now and drive it a mixture of all types of driving (slow/easy & fast/hard). It's been to the drag strip once with the blower setup on it and ran a 12.7 @ 113mph in the 1/4 mile. By the way, this was full weight on street tires with a terrible 60' in my defense. I'm a firm believer it's more dependent on the amount of boost and how it comes on for reliability of the bottom end. Also, the tune is obviously the most important part. I'd say around 10-12psi is the best range for power and reliability (if we're talking stock longblock - i.e. bottom end, stock cams, etc.). The power it makes on that amount of boost is what it is - usually around 400whp. I've read and agree that revving it past 6k rpm is riskier too. I've been shifting mine at 6500rpm for 3 Summers now and it's been fine though. If I wanted to make more power, I would do a set of blower cams and install my fuel system. That could potentially get me to 450-500whp. I'd be okay with that. If the tune looked good and it ran good, send it if you can afford a new engine. As for the hp/tq numbers on which dyno... I think it's more common to find a dynojet than a Mustang dyno. I'd say the 400-450whp safe limit is referring to a dynojet. Also, keep in mind that shops with dynos will sometimes skew their numbers or be different depending on factors such as temperature, elevation, etc. You'll hear that the track times determine how fast you are, not the dyno. [/QUOTE]
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Question regarding max power on stock bottom end
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