Thread: my M3 CSL
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Old 13-04-2015, 08:37 PM   #84
alexk
Driving it like I nicked it
 
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Lightbulb Weight saving bla-bla

I am very happy with my CSL but when you meet cars at the track with more horsepower, it is annoying to see them being faster on the straights.
BHP increase in the CSL is a painful road so I started running out of ideas.
Then Mr Gorilla reminded me about the importance of weight saving.

I think I can relative easy remove another 50kgs from my CSL, but what would this mean ?

I did some tests and now I will bore you with numbers.
The tests happened in a controlled environment, with exact same conditions and on the same test track.
I did two runs with less weight and then I added 32kgs to the car and repeated the same runs.
All runs were done with 3rd gear so as I don't shift gear.

Run with 32kgs less
70 -> 145 km/h
time: 6.3 secs
distance: 0.19km

60 -> 150 km/h
time: 8.0 secs
distance: 0.23km

Run with 32kgs more
70->145 km/h
time: 6.5 secs
distance: 0.20 km

60 -> 150 km/h
time: 8.1 secs
distance: 0.24 km

So we see here that when the car has 32kg added, it's consistently ~200ms slower in this type of acceleration and that in a virtual race it would be 100m behind compared to the lighter car.
That is a shocking difference.
Reducing 50-60kg from the weight of the already light CSL would have a significant difference.

I decided to start a CSL diet.

And here is a photo of the CSL yesterday, after I cleaned and polished it

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