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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Jun-05-2019, 03:03:03 PM   #1
TheDoogan
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Default The 'Smart' Tach

Ahoy, me au'lads! Tis the Doogan-oh once again.

Something has be gnawing at me, and I'm wondering if any of you can weigh in.

It seems so natural... so common sense... to program a tachometer with three needles, one main and two shorter and much thinner ones: ones that indicate the rotational speed the engine would be operating at, compared to the road vehicle speed, in both the next lower gear and the next higher gear.

But in the days of electronic gauges, these could be much more sophisticated still. In both cases, they could be re calibrated manually (had this existed 30 years ago) or electronically, if transmissions and gearing were ever changed in the car.

Wouldn't this be so handy? Or is there a blatant series of cons that I - never having actually raced a car in an official setting - am unaware of? Or is this idea simply an affront to those who actually develop an intuitive notion of engine speeds per gear, and wear this fact in their minds and on their results as something of a badge of honor - defensively reacting against any notion of making cars easier to drive?

It's not that I find myself mis-judging the RPMs in my power down shifts. It is only my love for efficiency and smooth shifting that makes me crave the information, which is there for the visualizing. (And I am almost never perfectly, perfectly exact in my shifts - perfection might only happen a few times per drive in the lower three gears). Perhaps that fact alone makes it an un-wise idea: putting driver attention anywhere other than the windshield for any longer than it needs to be...

In any case, I'll be curious to hear your thoughts. And as always: I hope you're all doing very well.

-DG VonN, IV
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Old Wed, Jun-05-2019, 03:08:31 PM   #2
CrookedCommie
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Default Re: The 'Smart' Tach

You forget to take your pills this morning?
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Old Wed, Jun-05-2019, 03:47:01 PM   #3
Obioban
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Default Re: The 'Smart' Tach

I think it would add a lot of complexity to a gauge that you should be able to understand at the briefest glance-- downgrade, imo.

I would enjoy something similar to what Mercedes did in the 80s:

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Old Wed, Jun-05-2019, 03:49:27 PM   #4
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Default Re: The 'Smart' Tach

The car has shift lights - be grateful that BMW gave you everything you really need. Once you learn to drive in a performance setting, it's extremely easy - especially since most situations need either 3rd or 4th gear.

As has been suggested to you before.. go do HPDE.

Other cars will blink or ding at you to suggest what gear the computer thinks you should be in for optimal efficiency.. and it's just annoying.
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Old Wed, Jun-05-2019, 03:58:44 PM   #5
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Default Re: The 'Smart' Tach

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Originally Posted by Drewster View Post
Other cars will blink or ding at you to suggest what gear the computer thinks you should be in for optimal efficiency.. and it's just annoying.
Don't get me started on the BS Corvette 1->4 efficiency shift thing (too late). It would lock out gears 2 and 3 until you put the shifter into 4, and only then could you put the tranny into 2 or 3 before releasing the clutch.

I like the Mercedes dots thing. I don't need help during acceleration...having done a few HPDEs, you learn pretty fast what your car sounds like getting to multiple redline shifts and then you just start doing it by ear. On the downshifts...well...the dots would be nice for not having to think about "am I slow enough for # gear" and what that speed is...since you have the dots to remind you!
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Old Thu, Jun-06-2019, 01:25:24 AM   #6
///M Dream
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Default Re: The 'Smart' Tach

The Dooooooooog
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Old Thu, Jun-06-2019, 06:41:50 PM   #7
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Default Re: The 'Smart' Tach

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Originally Posted by JamesSJ1 View Post
Don't get me started on the BS Corvette 1->4 efficiency shift thing (too late). It would lock out gears 2 and 3 until you put the shifter into 4, and only then could you put the tranny into 2 or 3 before releasing the clutch.
Oh god! I think it was called "Skip Shift" and it was the WORST.
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Old Fri, Jun-07-2019, 08:12:11 PM   #8
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Default Re: The 'Smart' Tach

Doog posts are better than black coffee in the morning.
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Old Fri, Jun-07-2019, 08:21:17 PM   #9
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Default Re: The 'Smart' Tach

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Originally Posted by E36Sport View Post
Oh god! I think it was called "Skip Shift" and it was the WORST.
It was called CAGS and yes it sucked. Immediately coded out on any LS powered vehicle I've ever owned. Computer aided gear selection.
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Old Fri, Jun-07-2019, 08:38:22 PM   #10
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Default Re: The 'Smart' Tach

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Originally Posted by angelr View Post
It was called CAGS and yes it sucked. Immediately coded out on any LS powered vehicle I've ever owned. Computer aided gear selection.
At least they make it easy to disable. Probably would rather have that situation than have to pay the gas guzzler tax.
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Discussing The 'Smart' Tach in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)