Top end in manual vs. auto E36 M3's - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 05-28-2006, 11:40 PM
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Top end in manual vs. auto E36 M3's

Got this info off of bmwmregistry.com:

"The North American-spec 3.2-liter E36 M3 retains the ZF Type C five-speed manual gearbox of the 3.0-liter version, with the same internal ratios: 4.20 (1), 2.49 (2), 1.66 (3), 1.24 (4), 1.00 (5). Starting with the 1997 model year, the ZF 5HP18 five-speed automatic returned as an option with the same internal ratios used on the 3.0-liter model: 3.67 (1), 2.00 (2), 1.41 (3), 1.00 (4), .74 (5).

All 3.2-liter M3s equipped with a manual gearbox (including SMG) use a shorter 3.23:1 final drive and limited slip differential. North American-spec M3s with the ZF five-speed automatic transmission have an even shorter 3.38:1 rear end, also with limited slip."

Doing some back of the envelope calculations, this would seem to indicate that my automatic is geared for a higher top end than the manuals. Never would have thought that would be true. Any guesses on why? What am I missing here?



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#2 (permalink) Old 05-29-2006, 12:17 AM
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maybe that autos are tuned more towards luxury and so they are tuned down to be more economical? where as a 5 speed is performance tuned?? just a guess...
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#3 (permalink) Old 05-29-2006, 12:22 AM
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My peak torque comes about 1200 rpms lower than manuals too.



1999 E39 540i/6-VF Stage 1 S/C, Dinan exhaust, Dinan strut+shock braces, Dinan ltwt flywheel + clutch, Dinan Brembo BBK, Dinan monoball, H&R Springs, Koni Yellows, M5 sways, Dinan forged 18" wheels, &c.

1995 E38 740i. Highly modded. Faster than you.

Sold 2-28-07: 1997 E36 M3/4, 8-30-05 RIP 1997 528i


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#4 (permalink) Old 05-29-2006, 12:31 AM
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thats strange as hell... not a clue why....
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