I tried replying to whoever asked this question but the thread was locked. Generally every 100 lbs removed will lower your time by a tenth of a second. It will only be noticable if you are consistent with your times

 

my friends JDM RHD prelude with intake ran 15.0, he stripped it fully...seats, sunroof, dash, interior exhuast....he ran a 14.5

lol had a piece of plastic duct taped for his sunroof haha

 

so make another thread..great idea..