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2011-2014 Mustangs
Engine/Tuning
CJ intake +a6+first couple of passes
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<blockquote data-quote="86merc" data-source="post: 13892143" data-attributes="member: 82554"><p>My best ET and MPH came with lowering my shift points in each gear. Like 7500 on the 1-2, 7300 on the 2-3 and 7000 on the 3-4. Granted it is a mt82 car with 3.73 and 28" tires. But same day, same track and in worse DA the car picked up with less rpm. The trans gearing may have something to do with that. But I am just not sold just yet that the CJ (on a GT engine) will ET and MPH best with real high rpm in every gear.</p><p></p><p>I believe Shaun when he says it needs a higher stall and gearing. That makes sense to keep it in the power band more. But I am not 100% sold the CJ on a coyote need 7500+ rpm to get the most out of it. I have only seen a couple people test different RPM with the CJ on the same day and same track. </p><p></p><p>The CJ makes the same HP from 6800 to 7800. That is great. But look at the formula to calculate horse power, HP=(RPM * T) / 5252. The torque is falling off the higher the motor spins. The RPM in the equation is what keeps the HP number stay up there. So can the lack of torque up in the RPM slow the car? Remember, torque is a measurable force. Horse power is from a calculation based on torque. It gives you an idea of the torque production through out the rpm.</p></blockquote><p></p>
[QUOTE="86merc, post: 13892143, member: 82554"] My best ET and MPH came with lowering my shift points in each gear. Like 7500 on the 1-2, 7300 on the 2-3 and 7000 on the 3-4. Granted it is a mt82 car with 3.73 and 28" tires. But same day, same track and in worse DA the car picked up with less rpm. The trans gearing may have something to do with that. But I am just not sold just yet that the CJ (on a GT engine) will ET and MPH best with real high rpm in every gear. I believe Shaun when he says it needs a higher stall and gearing. That makes sense to keep it in the power band more. But I am not 100% sold the CJ on a coyote need 7500+ rpm to get the most out of it. I have only seen a couple people test different RPM with the CJ on the same day and same track. The CJ makes the same HP from 6800 to 7800. That is great. But look at the formula to calculate horse power, HP=(RPM * T) / 5252. The torque is falling off the higher the motor spins. The RPM in the equation is what keeps the HP number stay up there. So can the lack of torque up in the RPM slow the car? Remember, torque is a measurable force. Horse power is from a calculation based on torque. It gives you an idea of the torque production through out the rpm. [/QUOTE]
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Engine/Tuning
CJ intake +a6+first couple of passes
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