Optimal Shift Points
Feb 10, 2005, 12:31 PM
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Optimal Shift Points
If one had a Dyno sheet and the gear ratios, it would seem possible to calculate the optimum rpm range to run each gear for best average torque/HP. Does anyone know the math to this, or do we just go by the seat of our pants? Mine seems to stop pulling around 6000rpm.
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2004 Evo VIII w 2400 miles
No mods yet, paying for daugters wedding!
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2004 Evo VIII w 2400 miles
No mods yet, paying for daugters wedding!
Feb 10, 2005, 12:35 PM
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Mine too at about the same rpm range, first you must consider what mods you have, my car is bone stock...
In my VR4, I improved from about 5500 to more than 7000rpm with a bunch of mods added to the engine...
In my VR4, I improved from about 5500 to more than 7000rpm with a bunch of mods added to the engine...
Feb 10, 2005, 03:34 PM
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Its fairly straightforward if you have a dynograph of your power output.. Figure out what RPM each shift drops and figure out where you have the most HP in that range..
Feb 10, 2005, 04:26 PM
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Originally Posted by justforfun
Is it simply HP or does where you are on the Torque curve play as well?
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Feb 10, 2005, 05:16 PM
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You're right, It's all about torque. Found a long post on the subject that seems to make sense. No formulas but I think I can figure it out from what was there. Seems like you have to not only use the torque but also factor in the mechanical advantage of each gear. So therefore. particularly in low gears, the torque would have to drop off badly before there would be any advantage to shifting. After all 2.98 in first vs 1.95 to second is a 35% advantage, so the torque would have to be down by that much over what it would be if the shift took place to make it worthwhile. Cool stuff.
Feb 10, 2005, 05:20 PM
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dude shift when the needle is about to hit seven. if you ride 1st gear out to seven from a launch you will hit like 7400rpms. even if you stop making power before seven if you shift early the next gear could be not high enough
Feb 11, 2005, 04:05 AM
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Originally Posted by evo_08
el boricua . tu conoces a chuco?el tiene un evo tanbien el vive en dorado
Feb 11, 2005, 04:08 AM
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Originally Posted by El Boricua
Siiiiii... conosco al hombre... a cada rato nos encontramos en la pista y en las reuniones de carrito.net .... el tipo brega super bien, ya me ha dicho par de trucos para el EVO, a modo de no gastar chavos de mas...