But in the end...air temp, sunshine, overcast, track temp, track rubber, wind direction, set up, etc make it really hard to compare times from different days...let alone different tires!!
Barber is a handling track and it is all about grip.
In August 2013, running Hoosier SM6's I set the SCCA SM lap record at Barber at 1:46.735. The SM6's were the hero tire with the most grip we have ever had.
Then in February 2015 on a really cold day, running Toyos, I was able to get into the mid 1:44's in qualifying, and set the new NASA SM lap record 1:45.719 (almost a full second faster than on the stickiest Hoosiers)
And then yesterday, in temperatures over 100 degrees, running on Hoosier SM7's I was able to almost equal my SCCA lap record, and ran 1:46.798.
So while on the same day, Hoosiers will generally be faster than Toyos, as Ron said, comparing lap times from different days is often going to be misleading unless you know all the conditions
Danny Steyn Racing | DSR YouTube Channel
Danny Steyn Photography | Adept Studios | OPM Autosports | Rossini Racing Engines | G-Loc | Traqmate | Traqgear
2016 June Sprints WInner, ARRC Winner, NASA Eastern States Championships Podium
2015 Eastern Conference Majors Champ, June Sprints Winner, ARRC Winner
2014 NASA Eastern States Championship Runner Up.
2013 SEDiv Driver of the Year, Eastern Conference Majors Champ, SEDiv National Champ, ARRC Winner, Runoffs Podium
2011 SEDiv Driver of the Year, SEDiv National Champ, ARRC Winner, Palm Tree Quad National Champ, SEDiv ECR Champ
2010 June Sprints Winner, ARRC Winner
2009 SARRC Champ, SEDiv ECR Champ, FES Champ
2008 SEDiv ECR Champ