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!
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
To you 3.0 manual 6 speed owners
- Thread starter 03z4
- Start date
03z4 said: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 said: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.
Part Number: 33107514129
Final drive: I=3,03
http://www.realoem.com/bmw/enUS/showparts?id=BT52-EUR-01-2003-E85-BMW-Z4_30i&diagId=33_1142
Z4 E85 Z4 3.0si DIFFERENTIAL-DRIVE/OUTPUT
Part Number: 33107514150
Final drive: I=3,23
http://www.realoem.com/bmw/enUS/showparts?id=BU53-USA-04-2005-E85-BMW-Z4_30si&diagId=33_1142
Z4 E85 Z4 2.5i DIFFERENTIAL-DRIVE/OUTPUT
Part Number: 33107514150
Final drive: I=3,23
http://www.realoem.com/bmw/enUS/showparts?id=BT31-EUR-01-2003-E85-BMW-Z4_25i&diagId=33_1142