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Originally Posted by 1slow370 6MT at 1500rpm in 4th = 319.66 wheel rpm 7AT at 1500rpm in 4th = 316.45 wheel rpm 370z purist, your thinking about final drives and
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02-23-2011, 03:51 AM
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#13 (permalink) | |
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A True Z Fanatic
Join Date: May 2010
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Quote:
 If we divide not mulitply to get those values, then... AT @1500 in 5th = 446.83 MT @ 1500 in 5th = 406.28 But... the same conclusion holds -- in 4th, both transmissions have about the same mechanical advantage, but if we dyno the MT in 5th and the AT in 4th it will be an apples-oranges comparison due to a greater mechanical advantage for the MT. So then do you agree everyone should just dyno in 4th? That seems to be the most commonly selected gear anyway... I see very few runs done in 5th, but when I do, those always show higher (i.e., outlier) torque values as I had noted above. EDIT: Actually, the 1% better wheel RPM due to gearing for the MT over the AT in 4th corroborates with the occasional evidence I see of about 1% more peak torque for the MT over the AT too... hmm.
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Enjoy it. Destroy it. Last edited by Jordo!; 02-23-2011 at 03:57 AM. |
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