A question about Z4 M's Nurburgring track time

[The HACK]

Originally Posted by superbow

The z4 M coupe also has same engine management as the csl, which is more upto date (processes info quicker I think) than what they use on the e46 m3.........

M3 CSL:

http://www.realoem.com/bmw/showparts...81&hg=12&fg=10

MSS54

MZ4:

http://www.realoem.com/bmw/showparts...86&hg=12&fg=10

MSS70

E46 M3:

http://www.realoem.com/bmw/showparts...81&hg=12&fg=10

MSS54

If I had to make an educated guess, the MZ4 ECU is a later generation ECU than the M3 CSL and E46 M3 ECU.

IF I had to guess.

And the R-Comps is EXACTLY why the CSL is faster than the MZ4R. The difference between R-Comps and Street tires on a 3 mile course can be as much as 5 seconds on the same car driven by the same driver. On a 14 mile long course, extrapolate that 5 seconds per 3 miles to 14 miles? About 23 seconds.

Hm...

[Burt Reynolds]

Originally Posted by The HACK

M3 CSL:

http://www.realoem.com/bmw/showparts...81&hg=12&fg=10

MSS54

MZ4:

http://www.realoem.com/bmw/showparts...86&hg=12&fg=10

MSS70

E46 M3:

http://www.realoem.com/bmw/showparts...81&hg=12&fg=10

MSS54

If I had to make an educated guess, the MZ4 ECU is a later generation ECU than the M3 CSL and E46 M3 ECU.

IF I had to guess.

And the R-Comps is EXACTLY why the CSL is faster than the MZ4R. The difference between R-Comps and Street tires on a 3 mile course can be as much as 5 seconds on the same car driven by the same driver. On a 14 mile long course, extrapolate that 5 seconds per 3 miles to 14 miles? About 23 seconds.

Hm...

[HenningH]

R-comps makes a huge difference.
Have not tried on a BMW, but on a couple of Caterham Super 7's.
R-comps of course needs the right temperature to work properly.