Markski tuning Runs 9.69 sec 1/4 mile @154.40 mph in a 996TTadmin2017-04-23T17:29:10-05:00 Markski’s 996TT runs a blistering 9.69 at 154.4 mph on a stock ecu and a 123.83 mpg 1/8th mile. Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail