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      05-05-2012, 06:52 PM   #1
Rekrul
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Those who have rev limit increase... quick question?

So does the rev limit increase on the tachometer IE the red and yellow indicators do they change?
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      05-05-2012, 07:41 PM   #2
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I have the Dinan D900-40M software.

http://www.dinancars.com/shop/D900-4...re.aspx#page=1

Redline on my tach (start of red region) is normally around 8,250 sitting at idle, which I find curious as their site says its raised to 8,600.
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      05-05-2012, 07:48 PM   #3
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I don't think it changes. The rev limiter is higher, however.
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      05-06-2012, 06:22 AM   #4
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Quote:
Originally Posted by FongSYM3 View Post
I don't think it changes. The rev limiter is higher, however.
The tach will not show a higher redline with the Dinan software for a current (v8) M3, but the max revs are raised to 8600.
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      05-06-2012, 09:33 AM   #5
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The tach on the M3 does not indicate actual revs. The M3 cluster was taken straight out of the E60 M5. This is why we see a red line at 8250RPM (the M5 red line). The engines revs are corrected so that when the needle hits an indicated 8250 the engine is actualy spinning at 8400RPM (the M3 red line). You can actually see this by accessing the hidden menu and look at actual revs.

So the OP question is very pertinent. With an increased cut off to 8600RPM, does the needle on the tacho go past 8250 or does an indicated 8250 now correlate to an actual 8600RPM?
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      05-06-2012, 11:08 AM   #6
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Quote:
Originally Posted by CanAutM3 View Post
The tach on the M3 does not indicate actual revs. The M3 cluster was taken straight out of the E60 M5. This is why we see a red line at 8250RPM (the M5 red line). The engines revs are corrected so that when the needle hits an indicated 8250 the engine is actualy spinning at 8400RPM (the M3 red line). You can actually see this by accessing the hidden menu and look at actual revs.

So the OP question is very pertinent. With an increased cut off to 8600RPM, does the needle on the tacho go past 8250 or does an indicated 8250 now correlate to an actual 8600RPM?
Exactly. Good info here.
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      05-06-2012, 11:34 AM   #7
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Great thread
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      05-06-2012, 12:19 PM   #8
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Quote:
Originally Posted by CanAutM3 View Post
The tach on the M3 does not indicate actual revs. The M3 cluster was taken straight out of the E60 M5. This is why we see a red line at 8250RPM (the M5 red line). The engines revs are corrected so that when the needle hits an indicated 8250 the engine is actualy spinning at 8400RPM (the M3 red line). You can actually see this by accessing the hidden menu and look at actual revs.

So the OP question is very pertinent. With an increased cut off to 8600RPM, does the needle on the tacho go past 8250 or does an indicated 8250 now correlate to an actual 8600RPM?
Really?So that means that my speed vs rpm calculations are off then!Interesting.
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      05-06-2012, 01:02 PM   #9
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Quote:
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Really?So that means that my speed vs rpm calculations are off then!Interesting.
That would be a 1.8% error, nothing dramatic...
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      05-06-2012, 05:12 PM   #10
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As further affirmation, my redline is raised and yes it still exceeds "redline" on a regular basis
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      05-06-2012, 05:54 PM   #11
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That would be a 1.8% error, nothing dramatic...
Yes not a big deal!
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      05-06-2012, 05:55 PM   #12
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Quote:
Originally Posted by klammer View Post
As further affirmation, my redline is raised and yes it still exceeds "redline" on a regular basis
I mean does the needle visibly go past the 8500 mark? Thats quite a bit of red lol. I mean when I shift at 8400 it appears as if the needle dips slightly past that mark as the car is shifting.
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      05-06-2012, 05:57 PM   #13
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i asked evolve this question before my tune and sal said if i really wanted him to they could do some programing to raise the indicated red line as well as the limit. didnt do this but my rev limit is 8600.
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      05-06-2012, 09:45 PM   #14
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I don't think it changes
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      05-06-2012, 10:22 PM   #15
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So if I've seen my needle at 8600 on the gauge cluster does that mean my motor is actually spinning at over 9000rpm?
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      05-07-2012, 12:23 AM   #16
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Quote:
Originally Posted by chriszeh View Post
i asked evolve this question before my tune and sal said if i really wanted him to they could do some programing to raise the indicated red line as well as the limit. didnt do this but my rev limit is 8600.
I don't understand how the indicated red line could be changed without physically opening the cluster and modifying it. From what I gather, it's actually a painted extension of the cluster unlike the yellow line.

On a side note, when I asked Sal to increase my limit to 8600 he told me 8500 was more than enough That being said, I am head over heels with my tune and have never hit the limiter so it was a moot point
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      05-07-2012, 08:50 AM   #17
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You could be right. All I know is I can pass the original red line if I want but rarely do even while on track. I usually shift at around 8000 and often short shift even further on certain sections of the track so I'm not executing a shift while mid corner and unsettle the car.
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      05-07-2012, 10:22 AM   #18
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Quote:
Originally Posted by THE-FN-MAN View Post
So if I've seen my needle at 8600 on the gauge cluster does that mean my motor is actually spinning at over 9000rpm?
Assuming that your tune does not change the tacho correction factor:

8600 indicated RPM x 1.018 = 8750 actual RPM
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      05-07-2012, 10:24 AM   #19
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Quote:
Originally Posted by DJDeez View Post
I don't understand how the indicated red line could be changed without physically opening the cluster and modifying it. From what I gather, it's actually a painted extension of the cluster unlike the yellow line.
This is correct. The ultimate 8250RPM red line on tacho is fixed and is not part of the variable red line mechanism.
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      05-07-2012, 10:45 AM   #20
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Why do people increase their redline? Is it really worth it? Any dyno graphs to support it? Sorry to derail; just curious.

Quote:
Originally Posted by CanAutM3 View Post
The tach on the M3 does not indicate actual revs. The M3 cluster was taken straight out of the E60 M5. This is why we see a red line at 8250RPM (the M5 red line). The engines revs are corrected so that when the needle hits an indicated 8250 the engine is actualy spinning at 8400RPM (the M3 red line). You can actually see this by accessing the hidden menu and look at actual revs.

So the OP question is very pertinent. With an increased cut off to 8600RPM, does the needle on the tacho go past 8250 or does an indicated 8250 now correlate to an actual 8600RPM?
Great info! Thanks!
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      06-12-2012, 08:50 PM   #21
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Quote:
Originally Posted by stefan View Post
Why do people increase their redline? Is it really worth it? Any dyno graphs to support it? Sorry to derail; just curious.



Great info! Thanks!
For me, it came with the car when I bought it.
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      06-13-2012, 07:54 AM   #22
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Quote:
Originally Posted by stefan View Post
Why do people increase their redline? Is it really worth it? Any dyno graphs to support it? Sorry to derail; just curious.
a) the M3 revs so eagerly that it feels strange to already shift up before the stock red line

b) the higher resulting rev in the next gear when you shift up will likely give you better acceleration due to more power being available.
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