12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

tq vs. hp

Old Jul 23, 2009 | 06:17 PM
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Default tq vs. hp

wat mods do wat? ive read that some mods are for horse power and others are for TQ.
 
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Old Jul 24, 2009 | 12:44 AM
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be honest im more worried about my tq numbers rather than my hp numbers
 
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Old Jul 24, 2009 | 12:49 AM
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i think they go hand and hand really...now when you add things that add fuel at the bottom end that would be more tq oriented i would say and then when you add fuel up top that would be hp more...maybe
 
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Old Jul 24, 2009 | 12:54 AM
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isnt tq just a measure of hp divided by RPm or something like that
 
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Old Jul 24, 2009 | 02:07 AM
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torque has alot to do with airflow
 
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Old Jul 24, 2009 | 02:15 AM
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Originally Posted by 94cummins12v
isnt tq just a measure of hp divided by RPm or something like that



Originally Posted by 12valvetater
torque has alot to do with airflow
i think you might have something there, if you can get the turbo to light faster then your gonna make more torque at the bottom...
 
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Old Jul 24, 2009 | 09:19 AM
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For a given torque, the equivalent power may be calculated. The standard equation relating torque in foot-pounds, rotational speed in RPM and horsepower is:

P(hp)=(T(ft-lb))(ω(r/min))/5252

Where P is power, τ is torque, and ω is rotations per minute.

As you guys said, feeding more fuel/air in the top end will gain you more horsepower, more fuel and air in low-end will gain more torque. Generally though if you increase one, the other will also go up, it's just a matter of what degree each is affected by the mod.
 
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Old Jul 24, 2009 | 11:37 AM
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Originally Posted by K50
For a given torque, the equivalent power may be calculated. The standard equation relating torque in foot-pounds, rotational speed in RPM and horsepower is:

P(hp)=(T(ft-lb))(ω(r/min))/5252

Where P is power, τ is torque, and ω is rotations per minute.
haha im not that good at math! and what deos the "r" stand for??
 
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Old Jul 24, 2009 | 11:46 AM
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[QUOTE=K50;369280]For a given torque, the equivalent power may be calculated. The standard equation relating torque in foot-pounds, rotational speed in RPM and horsepower is:

P(hp)=(T(ft-lb))(ω(r/min))/5252

Where P is power, τ is torque, and ω is rotations per minute.

Yes horsepower is derived from torque. From what I understand torque is what is used to move your vehicle, not hp. Makes sense.
 
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Old Jul 24, 2009 | 01:01 PM
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The r is for revolutions. And yes both are increased with mods tourqe is the initial power applied wher hp is the sustaining power more torque=more pulling power as well. You can have a million hp and not be able to pull a damn thing if you ain't got no tq so ya
 
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