not sure if you will want a 11 tooth front, you may want like a 13-14 tooth front we run 1/4 mile tracks here and i know every 1/4 mile is different due to banking or shape of track but we run 14 front and 49-51 rear in 2nd gear.... the 49 at a bulling type track and a 50 or 51 at a long straight tight turn paper clip type track.... looking at a gear chart you should prob start with a baseline some where around the 11.0-11.6 final ratio. you can acheive this many ways according to the chart like a 14-52 and 13-48 will yield nearly the same ratios in 2nd gear.... from what ive seen usually we and everyone else tries to run second maybe 3rd gear, looks like with your current combo you would have to run 4th to acheive something close to 11.0-11.6 never tried dont know how well that would work for ya but i know a 11 tooth front sprocket may be tough on a chain

http://speedpartz.com/images/r1_0411.pdf