To you 3.0 manual 6 speed owners

03z4 · Post by **03z4** » Sat Jun 24, 2017 12:40 pm

I wanted to know if you could post and confirm rpm at 75 mph...I'm thinking about putting in a 6 speed and wanted to know what the rpm are at 75 mph as I have a lot of commuting and set my cruise there every day but with the 5 speed I'm sitting at 3500 rpm for over an hour each way and hate it. Thanks!

defrinz4 · Post by **defrinz4** » Sat Jun 24, 2017 12:49 pm

The best I can do at this moment for you is at 60 mph it's 2,000 rpm.

RyanB88 · Post by **RyanB88** » Sat Jun 24, 2017 12:53 pm

In my si i could be wrong but I think 80mph is 3000rpm? Not 100% on that but it's around there

Chris_D · Post by **Chris_D** » Sat Jun 24, 2017 12:56 pm

+1 for 60mph commuting, around 2k rpm but more importantly 40+ mpg! Plus a more relaxed drive instead of fast slow fast slow driving...
Leave hooning for the weekend!

Rusky · Post by **Rusky** » Sat Jun 24, 2017 2:49 pm

I have smg which is a manual ish and 80mph is just under 3000rpm.

philbo909 · Post by **philbo909** » Sat Jun 24, 2017 4:45 pm

03z4 wrote: ↑Sat Jun 24, 2017 12:40 pm I wanted to know if you could post and confirm rpm at 75 mph...I'm thinking about putting in a 6 speed and wanted to know what the rpm are at 75 mph as I have a lot of commuting and set my cruise there every day but with the 5 speed I'm sitting at 3500 rpm for over an hour each way and hate it. Thanks!

on the si at 75 you're on about 2,8 /2,9 . much better just sticking to 70, won't add much on your commute, but saves plenty petrol

03z4 · Post by **03z4** » Sat Jun 24, 2017 4:53 pm

Ok so that's a decent rpm savings...I should easily be under 3k at 75...does anyone know if the rear ended is geared indentical between the 3.0si with 6 speed and 2.5 with 5 speed?

Mittens · Post by **Mittens** » Sat Jun 24, 2017 5:20 pm

03z4 wrote: ↑Sat Jun 24, 2017 4:53 pm Ok so that's a decent rpm savings...I should easily be under 3k at 75...does anyone know if the rear ended is geared indentical between the 3.0si with 6 speed and 2.5 with 5 speed?

I think this is the information you need.

Z4 E85 Z4 3.0i DIFFERENTIAL-DRIVE/OUTPUT
Part Number: 33107514129
Final drive: I=3,03
http://www.realoem.com/bmw/enUS/showpar ... Id=33_1142

Z4 E85 Z4 3.0si DIFFERENTIAL-DRIVE/OUTPUT
Part Number: 33107514150
Final drive: I=3,23
http://www.realoem.com/bmw/enUS/showpar ... Id=33_1142

Z4 E85 Z4 2.5i DIFFERENTIAL-DRIVE/OUTPUT
Part Number: 33107514150
Final drive: I=3,23
http://www.realoem.com/bmw/enUS/showpar ... Id=33_1142

Z4-forum.com

Z4-forum.com