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Kirkland M5, I don't plan on turning my M5 into an all out race car, and yes there are other more appropriate platforms to build a dedicated track car, but since this is an M5 forum, I thought it might be an interesting discussion to see what the possibilites are without giving up the luxury side. Of course speed costs big $$$$, but if I were to spent the $s on my M5 that some on this board have spent, I would devote a good portion to weight reduction vs simply adding more HP, since my interests are towards tracking the car. Also, my garage space is limited, so I can't add a dedicated track car. This leads me to looking at the possibilities given what I have, an M5. Since you seem to have a dedicated track car, great, count yourself lucky.
CF brakes, doesn't Porsche offer these as an option on the TT? Don't you think a street compound pad is possible with CF rotors?
CF drive shaft, several $K.
Yes the $ on the above are very high.
Weight of the seats? I don't know exactly. I changed out the seats in my last car (C4S Porsche) and they were about 60lbs each. The M5 luxury seats look to me like they would be much heavier, so I was guessing about 100 lbs/ea which could be replaced with a 15 lb racing seat.
Having said all of the above, since you seem concerned about pointing out price/performance factors, the best investment of all is in the nut behind the wheel (instruction + track time), do you agree on that point?
Doug
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