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      04-03-2009, 10:41 AM   #27
adonf92
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France
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Drives: BMW 335i E92
Join Date: Mar 2009
Location: France - Paris

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Quote:
Originally Posted by oddjob2021 View Post
Quote:
Originally Posted by adonf92 View Post
The final drive for the manual (mine) is 2.68 (for wheels 17")

But we are limited in top Speed with some parameters like Scx, vehicle mass, ...
I did the calculation and the top speed for some powers and the result is :
306 HP -> 286.6 km/h
360 HP -> 303.5 km/h
380 HP -> 309.3 km/h
The last final power is closer to reality.

So we can do even a little better with this MRC ...

The latest report on the auto box is very long (2.39) ...
all of your information looks very good and real, its just that ive seen a similar graph with the auto having a thoretical top speed of 17x and the manual at 199.

in our manuals, we shift at 40, 70, 110, 140 and so on...
We agree.
The gears for the manual are 4.06 / 2.40 / 1.58 / 1.19 / 1.00 / 0.87 and the axle ratio is 3.08

If you see the graph, the shifts for a manual (@7150, with wheels 17") are :
1 : 9.6 * 7.15 = 68.6 km/h = 42.7 mph <----
2 : 16.23 * 7.15 = 116.0 km/h = 72.1 mph <----
3 : 24.66 * 7.15 = 176.3 km/h = 109.6 mph <----
4 : 32.74 * 7.15 = 234.1 km/h = 145.5 mph
5 : 38.96 * 7.15 = 278.6 km/h = 173.1 mph
6 : 44.78 * 7.15 = 320.2 km/h = 199.0 mph <----
But in 6 the speed of 199 mph is impossible to achieve with only 306 HP.
The calculation shows that power should be of 419 HP (with SCx 0.68 and mass 1720 Kg) !

Warning ! I stress that these calculations were made with the wheels of origin (8Jx17).

Quote:
my freind has an automatic, he shifts his 3rd at 100, so his 4th is less than 140 and every gear is the same, less than the manual's shift point. If the auto had a 7th gear I would say you're right...
Again we agree.
With the automatic, the gears are the same as the 335d :
4.17 / 2.34 / 1.52 / 1.14 / 0.87 / 0.69
but the axle ratio is different : 3.46 (2.81 with the 335d)

So we have :
1 : 8.32 * 7.15 = 59.5 km/h = 37.0 mph
2 : 14.82 * 7.15 = 106.0 km/h = 65.8 mph
3 : 22.82 * 7.15 = 163.2 km/h = 101.4 mph <----
4 : 30.42 * 7.15 = 217.5 km/h = 135.2 mph
5 : 39.86 * 7.15 = 285.0 km/h = 177.1 mph
6 : 50.26 * 7.15 = 359.4 km/h = 223.3 mph
Again, it is not possible to achieve this speed of 223 !!

Quote:
[I'm not sure where you're getting this info, but no offense to you sir, I believe it is not correct.
See the attached JPEG and PDF files that provides some features for the E92 in Europe
The only missing information is the axle ratio of 3.46 for the automatic. I can not find the source of this particular information.

Quote:
BUT again, awesome job filming it, we all enjoyed it the speed reguardless.
Thanks
Attached Images
 
Attached Images
File Type: pdf extrait.pdf (144.4 KB, 75 views)
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BMW 335i MRC