yes this is true today i ran 14.04 in my r32 with out major engine changes compared to my 15.09 last time at the track.
what was different
my tyres were advan 032r's ( semi comps) and I fitted drift pineapples tuned for traction. my 60' time was 2.1 and I could have run faster than 14 . boost was .95 and I"m using an r33 turbo cooler etc. I also retained the firm bilstien suspension
see my site under my car for more info
meggala