2003 UK M3 CSL

[Mike RT4]

Just some more pictures showing pictures of the different screens - still in the process of building one with all three screens on display at once, because as previously mentioned, scrolling between screens is not ideal.

These temps were achieved after a short forray up to an indicated 140mph (rev limiter in 4th):






The diff and gearbox never get into the green (above 80°C / 176°F) unless on track.

For reference on the CSL, the last oil light on the rev counter goes out when the oil is at 65°C (149°F), which is a smidge above 75°C on the gauge (165°F on the US gauge)

I forgot to post the track temperature data (too busy enjoying the day to take photos):

Some interesting temperature data figures from the above track day.

27°C (81°F) ambients
Longest session: 20mins
Number plate removed for max airflow.

Aircon on max all the time.

On track peak water temps 89°C (192°F)

Air intake: 32°C (90F) (spiked at 78°C (172°F) queueing for the noise test).

Transmission: 118°C (244°F)
Engine: 116C (241°F) (dash gauge showing just over 3/4 - 125C(257°F))
Diff: 114C (237°F)

[Arlen4369]

Good thread. Ordered a pair of the same rear arms

[Gearhead55]

Mike RT4 I'm not seeing specific mention of it in this thread other than the little (x4 for track use) note when describing the wheel/tire set up, could you give a little more info about that? Are you running the 9.5 rears with a 265/30 squared tire set up on the track? And is that with only a 12mm rear spacer or 12mm spacers all around? TIA

[Mike RT4]

Mike RT4 I'm not seeing specific mention of it in this thread other than the little (x4 for track use) note when describing the wheel/tire set up, could you give a little more info about that? Are you running the 9.5 rears with a 265/30 squared tire set up on the track? And is that with only a 12mm rear spacer or 12mm spacers all around? TIA

Hi there, yes that is correct. However, with the offset of the rear wheels, you have to take the front spacers off when running the OEM 9.5s on the front (they would poke and hit the arches with spacers - in fact you need at least 3° of camber to run them even without spacers). I actually found that the 265/30 square set-up gave too much grip on the front end for the standard CSL seats and seat belts on slow corners, where I found I was being lifted out of the seat with the g-force that this set-up gave and trying to brace myself to prevent this was uncomfortable. As it's just for fun, I prefer to run the OEM staggered set-up, where I just reduce my entry speed accordingly. The square set-up really requires proper seats with harnesses (the CSL seats don't have the same kind of support, and despite being fixed back, have no provision for harnesses).

[Gearhead55]

Hi there, yes that is correct. However, with the offset of the rear wheels, you have to take the front spacers off when running the OEM 9.5s on the front (they would poke and hit the arches with spacers - in fact you need at least 3° of camber to run them even without spacers). I actually found that the 265/30 square set-up gave too much grip on the front end for the standard CSL seats and seat belts on slow corners, where I found I was being lifted out of the seat with the g-force that this set-up gave and trying to brace myself to prevent this was uncomfortable. As it's just for fun, I prefer to run the OEM staggered set-up, where I just reduce my entry speed accordingly. The square set-up really requires proper seats with harnesses (the CSL seats don't have the same kind of support, and despite being fixed back, have no provision for harnesses).

gotcha. They look great. I run a 265 or 275 square set up with more than -3* camber up front already, so I think a square 9.5 CSL wheel would work too.