What’s your rpm at 90?

e30fanatic · 03-22-2023, 05:37 PM

Looking to buy an e82 and was curious what your rpm is while doing 90mph in 6th. More specifically wanted to know for the 128i but would also like to know for the 135.

Tuxedo · 03-22-2023, 05:58 PM

MT 3300 e88 128i

Houranimd49 · 03-22-2023, 08:32 PM

About 3300 for me too. 135 6MT

Piper1 · 03-22-2023, 08:58 PM

Quote:

Originally Posted by e30fanatic

Looking to buy an e82 and was curious what your rpm is while doing 90mph in 6th. More specifically wanted to know for the 128i but would also like to know for the 135.

This is a great site with a pretty darn good calculator.
https://web.archive.org/web/20200722...GearRatios.htm

The 1series is all the way at the bottom of the list and the link for the calculator to the left so you can plug in your specific ratios and let it compute everything. A very useful tool when I was swapping my diff in the e85 changing gearing. Set the cruise mph to 90 and it’ll give you what 6th should be for your ring/pin gearing to trans gear.

Tuxedo · 03-22-2023, 10:21 PM

3360 is about it, I was way off

Lester · 03-23-2023, 04:55 AM

Don't forget - the speedo reads 3-5% high. To get the actual rpm's at true 90 mph you'd have to use a GPS on the dash that will read the speed more accurately.

Except for Nevada, are there any States that allow 90 mph on the highway anymore?
In Canada, 110 km/h (69 mph) is considered a high speed limit.

We had recently a US driver who tried to argue his way out of a speeding ticket because he claimed he thought the sign that read 90 km/h was intended to be 90 mph!

90 mph = 145 km/h.

bobowar135 · 03-23-2023, 05:57 AM

My Aussie 135i 110kmh on my gps = 115kmh on my speedo
100kmh on my gps = 105kmh on my speedo

jdt10768 · 03-23-2023, 08:00 AM

148 mph in 4th gear? engine go boom

Piper1 · 03-23-2023, 08:21 AM

Is your redline 8000?

Piper1 · 03-23-2023, 08:47 AM

Quote:

Originally Posted by Tuxedo

3360 is about it, I was way off

Thats adjusted for gearing and redline from the first chart for 128 mt

Tuxedo · 03-23-2023, 09:33 AM

Quote:

Originally Posted by Tuxedo

MT 3300 e88 128i

Quote:

Originally Posted by Tuxedo

3360 is about it, I was way off

Quote:

Originally Posted by Piper1

Thats adjusted for gearing and redline from the first chart for 128 mt

I was being facetious about being off by 60rpm

Piper1 · 03-23-2023, 10:02 AM

Quote:

Originally Posted by Tuxedo

I was being facetious about being off by 60rpm

no I just plugged in for other gears besides 6th and just changed redline. I’m close to that when I changed to 4.10 final drive on the e85 going 75-80 cruising.

injim · 04-22-2023, 06:30 PM

Quote:

Originally Posted by e30fanatic

Looking to buy an e82 and was curious what your rpm is while doing 90mph in 6th. More specifically wanted to know for the 128i but would also like to know for the 135.

i WAS RUNNING 100 AT 3K RPM

03-22-2023, 05:37 PM	#1
e30fanatic New Member 2 Rep 6 Posts Drives: BMW 325i 1991 Join Date: Mar 2023 Location: Georgia iTrader: (0)	What’s your rpm at 90? Looking to buy an e82 and was curious what your rpm is while doing 90mph in 6th. More specifically wanted to know for the 128i but would also like to know for the 135.
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03-22-2023, 05:58 PM	#2
Tuxedo Bowties r cool ▶:◀ 1409 Rep 796 Posts Drives: 09' 128i MT e88, 24'G05 X5 50e Join Date: Apr 2014 Location: Chicago iTrader: (0) Garage List 2009 BMW 128i e88 [0.00]	MT 3300 e88 128i
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03-22-2023, 08:32 PM	#3
Houranimd49 First Lieutenant 252 Rep 332 Posts Drives: F10 535i xDrive, F25 xDrive35i Join Date: Apr 2019 Location: MI iTrader: (0) Garage List 2012 BMW X3 xDriv ... [9.25] 2011 BMW 535i xDrive [9.50]	About 3300 for me too. 135 6MT
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03-22-2023, 10:21 PM	#5
Tuxedo Bowties r cool ▶:◀ 1409 Rep 796 Posts Drives: 09' 128i MT e88, 24'G05 X5 50e Join Date: Apr 2014 Location: Chicago iTrader: (0) Garage List 2009 BMW 128i e88 [0.00]	3360 is about it, I was way off Attached Images
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03-23-2023, 04:55 AM	#6
Lester Brigadier General 295 Rep 3,350 Posts Drives: Join Date: Oct 2007 iTrader: (0)	Don't forget - the speedo reads 3-5% high. To get the actual rpm's at true 90 mph you'd have to use a GPS on the dash that will read the speed more accurately. Except for Nevada, are there any States that allow 90 mph on the highway anymore? In Canada, 110 km/h (69 mph) is considered a high speed limit. We had recently a US driver who tried to argue his way out of a speeding ticket because he claimed he thought the sign that read 90 km/h was intended to be 90 mph! 90 mph = 145 km/h. Last edited by Lester; 03-23-2023 at 05:04 AM.. Reason: Typo
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03-23-2023, 05:57 AM	#7
bobowar135 Second Lieutenant 3479 Rep 208 Posts Drives: 08' Sedona Red 135i Join Date: Jun 2019 Location: Broken down again iTrader: (0)	My Aussie 135i 110kmh on my gps = 115kmh on my speedo 100kmh on my gps = 105kmh on my speedo
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03-23-2023, 08:00 AM	#8
jdt10768 Lieutenant 330 Rep 529 Posts Drives: 2013 128i MSport 6MT Join Date: Sep 2018 Location: Columbia, SC iTrader: (0)	148 mph in 4th gear? engine go boom
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03-23-2023, 08:21 AM	#9
Piper1 Lieutenant 570 Rep 561 Posts Drives: E85 Join Date: Mar 2018 Location: Here and there iTrader: (1)	Is your redline 8000?
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