as far as REAL 1/4 mile numbers my 1988 iroc with fresh .040 over 5.7, slp headers, no cats and flowmaster 3" exhaust would run VERY consistent 14.80's at 89-91mph. thats it. car ran perfectly. always thought the TPI motor would have made a great truck engine. all torque off idle but runs out of steam at 4500 rpm.