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Old 02-25-2010, 12:08 AM   #1
Scooby Guru
Member#: 64673
Join Date: Jun 2004
Chapter/Region: NWIC
Location: portland
1990 Legacy wagon
goes 12.387 @ 116.5

Default Help or Hurt... 205/55/16 to 205/50/15 tire size...

So I am currently trapping 117.xx @ 6900 rpm at the finish line with the 205/55/16 tires.

Calculations say if I change to 205/50/15, I would hit 108.5 @ 6900rpm. Slightly larger tire 225/50/15 I would hit a about 112.xx @ 6900 rpm.


Technically I get out of the hole a bit quicker, but will the fact I need to shift to 5th be benificial?

I am making about 400/400 power....
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