manual 135i driver's cheat sheet

[wnta135]

This chart is wrong. I posted a complete chart earlier somewhere on this site (and it's in mph).

[sndprssr]

Originally Posted by Dan203

I saw your conversion, I was just offering up the Google solution as an alternative because it's just as easy as doing the math yourself with a calculator.

Dan

My bad, I wasn't referring to you, you just got caught up in the cross fire. Google is a good alternative if you are already just playing around on the computer.

[fe1rx]

Originally Posted by professor

these are purely theoretical based on the feed values of the 135i final drive and gearing ratios as well as its redline and peak torque RPM. so it is not meant to replicate real world dynamics (especially at end point speeds as you so astutely note) but works well at reasonable speeds.

Not only are these numbers wrong, they are completely wrong. The error is not consistent from gear to gear so you must have multiple errors in your assumptions.

Gear ratios are 4.06, 2.40, 1.58, 1.19, 1.00, 0.87
Final drive is 3.08
revs per mile are 830 for a 245/35-18

This gives mph @1000 rpm of 5.8, 9.8, 14.9, 19.7, 23.5, 27.0
or km/h @1000 rpm of 9.3, 15.7, 23.8, 31.6, 37.6, 43.2

Not that any of this matters or is any way relevant to perfecting one's heel and toe ...

[Tom K.]

Originally Posted by fe1rx

Not only are these numbers wrong, they are completely wrong. The error is not consistent from gear to gear so you must have multiple errors in your assumptions.

Gear ratios are 4.06, 2.40, 1.58, 1.19, 1.00, 0.87
Final drive is 3.08
revs per mile are 830 for a 245/35-18

This gives mph @1000 rpm of 5.8, 9.8, 14.9, 19.7, 23.5, 27.0
or km/h @1000 rpm of 9.3, 15.7, 23.8, 31.6, 37.6, 43.2

Not that any of this matters or is any way relevant to perfecting one's heel and toe ...

But are your figures "purely theoretical based on the feed values of the 135i final drive" like Professor's??? (I wonder how much I'll have to feed the final drive on my 128i to get 240 mph.)
Tom

[fe1rx]

Originally Posted by Tom K.

I wonder how much I'll have to feed the final drive on my 128i to get 240 mph.
Tom

I have no idea what that question even means.

But to put it another way R&T reports in the May issue the following speeds vs rpm, which are within 1% of my "theory"

1st 7000 rpm 41 mph
2nd 7000 rpm 69 mph
3rd 7000 rpm 105 mph
4th 7000 rpm 140 mph
5th 6300 rpm 150 mph
6th 5500 rpm 150 mph (which implies 191 mph at 7000 rpm)

[Tom K.]

[quote=fe1rx;107510]I have no idea what that question even means.

My point exactly - a nonsense chart with gibberish for an explanation.
Your figures (and R&T's) are the correct ones.
Tom