▁drag ▁rac ers ▁took ▁to ▁augment ing ▁delay ▁boxes , ▁or ▁paid ▁techn olog ists ▁for ▁circuit ry ▁to ▁do ▁so . ▁These ▁rac ers ▁conce aled ▁custom ized ▁hom em ade ▁electronic ▁circ uits ▁within ▁the ▁delay ▁box ▁en closure ▁in ▁a ▁ste alth y ▁manner ▁which ▁did ▁viol ate ▁some ▁drag ▁racing ▁rules . ▁The ▁modifications ▁involved ▁circuit ry ▁which ▁en hanced ▁the ▁race ▁car ' s ▁E lapse ▁Time ▁consist ency . ▁Ve h icle ▁E lapsed ▁Time ▁is ▁a ▁separate , ▁but ▁equally ▁critical , ▁variable ▁to ▁winning ▁a ▁bra cket ▁race . ▁The ▁un eth ical , ▁hidden ▁home ▁bre w ▁circ uits ▁performed ▁closed ▁loop ▁control ▁of ▁a ▁drag ▁race ▁car ' s ▁E lapsed ▁Time ▁( ▁E . T .). ▁This ▁type ▁of ▁electronic ▁vehicle ▁control ▁was ▁prohib ited ▁because ▁it ▁viol ates ▁rules ▁by ▁automatically ▁performing ▁on - board ▁tasks ▁not ▁triggered ▁by ▁the ▁driver . ▁This ▁circuit ry ▁became ▁inserted ▁into ▁a ▁commercial ▁delay ▁box ▁en closure ▁by ▁the ▁end ▁user ▁as ▁a ▁preferred ▁hiding ▁place . ▁Such ▁home ▁bre w ▁circuit ry ▁created ▁a ▁" f lare ▁up " ▁of ▁the ▁controvers y ▁related ▁to ▁electron ics ▁in ▁drag ▁racing , ▁addition ally , ▁and ▁unf air ly ▁t arn ishing ▁the ▁delay ▁box . ▁Had ▁these ▁un eth ical , ▁home ▁bre w ▁circ uits ▁been ▁hidden ▁elsewhere ▁( or ▁had ▁never ▁been ▁created ), ▁the ▁delay ▁box ▁most ▁likely ▁would ▁have ▁been ▁sp ared ▁regul atory ▁action . ▁ ▁Reg ulation