Well what is done to your brothers car,mine has complete stock interior still and the added weight of a 6-point bar,running stock suspension and those 11.0's are through full exhaust,running a smaller cam and ONLY 10.9 to 1 compression,with a dual plane manifold..i'm sure if i upped the compression and put a bigger cam in it,i'd be well into the low 10's.by the way it 60' in the 1.40's...on STREET TIRES...oh and it only has 3.91's..