Quote:
Originally Posted by Want.FR-S
Another note: does anyone knows why the top speed is at 145 mph? Was that government limited or simply not enough power to go higher? Based on the spreadsheet, with 3.727 final drive ratio, one could reach 300 KM/hr at 7200 RPM. This could be a contender in the Tokyo Midnight Wangan run.
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No way would it hit 300 km/hr. Most of my tables don't reflect top speed, which is reportedly drag limited.
Quote:
Originally Posted by Want.FR-S
Being in Canada I am more used to KM/H rather than inch/feet/mile. I also use spreadsheet to do these calculation, and my results are closed to what Deslock provide.
Some points;
1. Tire diameter for 215/45/17 is 625.30 mm / 24.62 inch *without* considering the deformation. I do not know how that is determined but a 0.7" deformation could be significant.
2. The default tire selection is 205/55/16 with diameter 631.90 mm / 24.88 inch. So if you swap this tire with the 17" one from OEM you could reach 60 mph in 2nd gear with larger circumference.
3. Based on its gear ratio, the automatic should be able to hit 60 mph in second gear. That could mean a faster 0-60 time.
4. According to the Subaru website in Japan, if the care comes with 16 in wheel, its final drive ratio is *different*. I wonder if they have to use a different final drive ratio to compensate the difference of circumference between the 16" and 17" wheels.
That's it for now.
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There's got to be some tire deformation, but 0.7" is higher than I'd expect for 215/45R-17 (maybe I'm wrong).
You brought up a good point regarding the 16" rims... if those are standard on the cars with a 3.727 DR, then (ignoring deformation):
6MT, DR 3.727, Dia 24.88" (205/55R-16):
Code:
RPM 1st 2nd 3rd 4th 5th 6th
7450 40.8 67.6 96.0 122.0 - -
I had intended to clean up my spreadsheet and post it on google docs, but never got around to it.