Quote:
Originally Posted by CSG Mike
How were the ambient temps on each of those days? Looks like the 255 tire day may have also had (by far) the best conditions between surface temps and ambient.
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The 255 day was in January, with air temps in the 60's. The other videos had almost identical temps in the 80's.
With higher temps and lows grippy Falken Azenis 615k+ in 255 I've been able to consistently dip into the 1:25's.
The 255 video was the best conditions and I really only added it because it was the only time I've run the 255 RE71r and it is my PB (I ruined the passenger side tires over those 6 sessions, they started the day as stickers).
The wider tires didn't seem to cost me any speed in the straights, and I could maintain an extra couple of mph in the long sweepers. This isn't the most scientific data and I didn't intend those track days as tire width tests (I picked up the 225s cheap after the pro solo as used take-offs specifically for non- competitive sessions).
The scca time trial program I run with uses modified autox classes and only one of the tracks we run at has long enough straights to favor a narrower tire, so I default to the 255's.
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