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BMW 3-Series (E90 E92) Forum
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Procede installed
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07-12-2009, 07:10 PM | #23 | |
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TIA
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07-13-2009, 01:38 AM | #24 |
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07-13-2009, 12:59 PM | #25 |
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I don't think so. I really doubt 317 km/h is achievable with stock gearing. 300-305 km/h - maybe. Here's my top speed run. 294 km/h and only ~200 rpm left. And a record should be GPS verified.
Still very impressive. Data logs aren't very accurate. 100-200 km/h: data logs - 10.03s, PerformanceBox (most accurate method) - 11.2-11.3s. My best results with PerformanceBox: 100-200 km/h - 10.02s 60-130mph (96.5-209.2 km/h) -11.71s I'll definitely improve the results in the near future. Sorry for the OT.
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07-13-2009, 03:07 PM | #26 |
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EDO, your statement is correct. but you must differ between at and mt.
you have an mt car. here you have the following gear ratio and axle gear I -4,06 gear II -2,40 gear III -1,58 gear IV -1,19 gear V -1,00 gear VI -0,87 axle - 3,08 for the at box i have the following numbers gear I -4,171 gear II -2,340 gear III -1,521 gear IV -1,143 gear V -0,867 gear VI -0,691 axle - 3,727 i dont know the dimension of your tires. so i use the dimension of my tires for the calculation (255-30 R19). for tire scope i presuppose new tires (1938,85mm). sorry for the metric units ![]() in fact of these numbers and requirements the mt car has a vmax at 7000rpm from 306,8km/h. in your thread you says that you have round about 200rpm left at your 294km/h run. according to my calculations with my numbers your speed at 6800rpm is 298,1km/h. the difference between your gps and my calculation can be simple the scope of tires. so you can see - the calculation on base the rpm is quite near to the gps. and now the numbers for the at car. at 7000rpm the speed is 319,3 km/h. now i have logged a max rpm from 6967. thats true - unless the canbus liar. and thats a speed of 317,7km/h. that you say now? okay, i must calculate a tollerance and measurement error. but i think the speed was clearly over 300km/h at this run. on my next high speed test i have defnitly a driftbox in my car for gps data. lars
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07-13-2009, 03:20 PM | #27 |
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Ah... I forgot your car was AT.
I was speaking about MT. My front tyres are 235/35 R19, rear - 275/30 R19. By the way, did you consider air resistance at such speeds? It's huge! Aren't your calculations theoretical?
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07-13-2009, 03:36 PM | #29 | |
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and it's true that the calculations is theoretical. but the reached rpm is true. i have recalculate your tires. the scope is 1975,18mm. then you have a profile of 5mm your speed at 6800rpm is exactly 294,0km/h. You see, this calculation based on the reached rpm is not so bad. i think a run with gps and canbus logging is the best mix ![]()
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07-13-2009, 03:49 PM | #30 | |
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in the video you can not see this correct. between 270 and top speed you have only 1000rpm with the at. in this video you can not perfect see the movement of the indicator. it's bad to driving with the cam in one hand ![]()
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07-13-2009, 04:51 PM | #31 |
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I am sorry, but I do not believe that at all... No way you get can close to redline in 6th gear with 360-380 Whp... The car is drag limited... I would be very surprised to see anything over 300 KPH
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07-31-2009, 05:03 AM | #32 |
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