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| 08-18-2011, 09:45 PM | #1 |
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Private First Class
 
6
Rep 109
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Auto trans gear ratios
Does anyone out there know the gear ratios of the Automatic tranny? If so could you share? I need to do some calculations for shift points.
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09 135i
Cobb e30 tune, VRSF DP's, 7"intercooler, Chargepipe w/ Tial BOV, RB PVC, Wavetrac LSD, KN air filter, More suspension upgrades than I can remember. Alpina tranny flash. I am putting the mods here in case I DO forget. Coming soon to a 135i near you, a one off exhaust and a one off oil cooler. |
| 08-18-2011, 10:13 PM | #2 |
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Resident Kerbalnaut
477
Rep 10,703
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I'll save you the trouble (6200 rpm)
It's also printed on bmwusa's website under the "specifications" heading I'm feeling lazy now so you can do the rest yourself
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| 08-18-2011, 11:22 PM | #3 | |
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UNC FTW
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Rep 741
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Quote:
The 135 seems to die around 7k so shift a bit earlier and you should be golden. |
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| 08-19-2011, 04:38 PM | #4 |
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Private First Class
6
Rep 109
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Thanks for the responses. On the BMW site I see there is what appears to be 2 ratios for 4th gear. It goes
l/ll/lll/lV 4.78/3.06/2.15/1.68 lV/V/Vl 1.39/1.20.1.00 I understand what you are saying but, consider torque multiplication of each gear coupled with the torque curve and there is a sweet spot for each gear when calculated out from a dyno sheet. Usually higher RPM as you go up gears. Part of this is academic, as I doubt anyone here myself included hits each gear perfectly each time but it is something to strive for. Thanks
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09 135i
Cobb e30 tune, VRSF DP's, 7"intercooler, Chargepipe w/ Tial BOV, RB PVC, Wavetrac LSD, KN air filter, More suspension upgrades than I can remember. Alpina tranny flash. I am putting the mods here in case I DO forget. Coming soon to a 135i near you, a one off exhaust and a one off oil cooler. |
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