look up john shep on youtube 7 second 4 cylinder dsm with no nitrous
well what about Tony "The Sarge" Schumacher who ran Schumacher broke the ET record at 4.428 seconds and still holds the NHRA National speed record for Top Fuel dragster of 336.15 mph from.
now i realize that this run was most likely done with nitro, but nitro in a 7 sec car isnt ganna make up 2.5 sec.