Assuming you are running 17.5 (In OffRoad mod, you rarely, if ever, increase motor timing) then hypothetically, yes, but it's something you have to experiment with firsthand. Also, if/when you do, judge your success off your total laptime not just - "Wow, I'm faster on the straight" - I've seen so many people make themselves noncompetitive in a 17.5 class by taking a motor out of the package, cranking the endbell all the way up and winding up with a car totally bogged down in the infield part of the track. It's then always amusing to try to explain to someone who has the fastest car in the building for the last ten feet of straightaway why they're 1.1 a lap off the actual fast guy in the class.