Stock Rev Limit

#1

What is the rev limit of the stock M20 with the stock chip? My G2X says around 6350. I thougth it was 6500. The tach says around 6500. What is it actually set at? Anyone know?

Michael O.

#2

ilateapex wrote:

[quote]What is the rev limit of the stock M20 with the stock chip? My G2X says around 6350. I thougth it was 6500. The tach says around 6500. What is it actually set at? Anyone know?

Michael O.[/quote]

If I recall correctly, it is 6500 in 1st and 2nd. It is 6250 in 3rd, 4th, and 5th.

All of the BMWs I have owned have those numbers as their rev limits.

-Steve

#3

stevekappy wrote:

[quote]ilateapex wrote:

[quote]What is the rev limit of the stock M20 with the stock chip? My G2X says around 6350. I thougth it was 6500. The tach says around 6500. What is it actually set at? Anyone know?

Michael O.[/quote]

If I recall correctly, it is 6500 in 1st and 2nd. It is 6250 in 3rd, 4th, and 5th.

All of the BMWs I have owned have those numbers as their rev limits.

-Steve[/quote]

I never knew that. No wonder when my shift light is set to 6300 I hit rev limiter in 3rd :silly:

#4

How does the car know what gear it is in??

#5

AFAIK, an E30 has no way of knowing (or even guessing) what gear it’s in. A mainstream magazine published that the 1995 M3 had a gear-variable revlimiter back when the car was introduced, but I never saw it confirmed in any of the technical literature published by BMW.

#6

30SpecE30 wrote:

wheel speed sensor.

#7

jonmca wrote:

[quote]30SpecE30 wrote:

wheel speed sensor.[/quote]Actually Iis the Diff speed sensor.
http://www.turnermotorsport.com/html/detail.asp?PRODUCT_ID=413/506%20d-SS

#8

nasaregistrar wrote:

[quote]jonmca wrote:

[quote]30SpecE30 wrote:

wheel speed sensor.[/quote]Actually Iis the Diff speed sensor.
http://www.turnermotorsport.com/html/detail.asp?PRODUCT_ID=413/506%20d-SS[/quote]

something that is spinning is telling the computer what gear you must be in.

How about that?

#9

mrussell wrote:

If you look at your tachometer closely, you will notice a smaller red bar from 6250 to 6500 then a larger red bar to indicate red line in all 5 gears. The smaller bar is to indicate that there is a difference in red lines between those two RPMs.

-Steve

#10

i don’t remember a vehicle speed signal being listed as one of the inputs to the DME. In which case it would be impossible for the DME to have a speed (or gear) sensitive redline. My recollection is that the DME only has one redline, but I can see overshoot occuring in the first two gears making it look like they have a higher redline.